SERIES P8822-001-R - Elektro-Trading sp. z oo

SERIES P8822-001-R
Two Axis Position Controller
− 2 or 3 switched speed operation
− 99 Line programme
− Manual Operation
− Single Operation
P8822
NR.
mm
ELGO
ELECTRIC
> > >
Hand
Single
Hand
Single
7
8 9 NR
Prog
Prog
P-End
4
5 6 >
Start
1
2 3 E
Stop
C 0 T R
Preliminary manual !
ELEKTRO-TRADING sp. z o.o.
44-109 Gliwice, ul. Mechaników 9, tel. (032) 734-55-72, fax. (032) 734-55-70
e-mail: et@elektro-trading.com.pl www.elektro-trading.com.pl
P8822-001-SV002V0-7 41/99
1

INDEX
Page
1. General 3
1.1 Principles of operation 3
1.2 Method of operation 4
2.0 Features & Functions 5
2.1 Bi-directional control 5
2.2 Backlash compensation 6
2.3 Stop offset and positioning accuracy 6
2.4 Automatic stop-offset calculation 7
2.5 Tolerance window (error blanking) 8
2.6 Automatic retract 8
2.7 Datum function 9
2.8 Manual datum 9
2.9 Tool offset compensation 9
2.10 Incremental error compensation 9
2.11 Double start input 10
2.12 Inch/metric selection 10
2.13 Decimal point 10
2.14 Encoder multiplication factor 10
2.15 Software limits 11
2.16 Two axis position comparator 11
2.17 Encoder pulse monitoring 11
2.18 Fault Monitoring 12
3 Controller in Operation 13
3.1 Programming 14
3.2 Programme memory 14
3.3 Checking of programme 14
3.4 Editing in operation 14
3.5 Programme in operation 15
3.6 Operating with "fixed" programmes 15
3.7 Single operation 15
3.8 Manual operation 16
3.9 Memory on power down 16
3.10 Locking out Keypad 16
4. Testing, Monitoring & Setting up 17
4.1 Setting of Registers 17
4.2 Default values for Registers 18
5. Parameter list 19
6. Description of Parameters 20-26
7. Terminal layout 27-28
8. Technical Data 29
9. Setting and commissioning 30
2

THE P8822-001-R CONTROLLER
1. GENERAL
The P8822 controller has been supplied for a number of years and during this time many features
have been added to suit particular customers. Most of these features are advantageous to most
customers, consequently Elgo Electric has now incorporated all the features in one standard
software.
All units with this software have the following designation on the outside of the enclosure and also
on the surface of the EPROM.
P8822-001SV002V0-7
1.1 Principles of Operation
update number
The P8822 Controller is designed to Operate with 2 or 3 speed reversing drives, on the basis of
fast/slow/stop. There is also optional module for analogue output for servo-motor available.
The controller outputs can be selected to operate
Forward and Reverse contactors
Run and Reverse for Inverter systems
Independent fast & slow, forward & reverse contactors for 2 and 3 speed motors.
Position is monitored by means of an incremental Encoder. The outputs are transistors or relays.
(R- Version) Inputs are NPN or PNP. The power supply unit is integrated. The controller can be
used to position machinery to any desired absolute position.
In this manual, the Registers are designated e.g. R1 to R99.In the X Axis display the parameters of
the X Axis are displayed. In the Y- Axis display the parameters of Y- Axis are displayed. If the
function of the register is commune for X and Y Axis only X- Axis window is used.
3

1.2 Method of Operation
The P8822 controller has the following features:
Absolute positioning mode
Incremental positioning in forward an backward direction
Tool offset compensation in incremental mode
Operation in programme mode
Operation in manual mode
Operation in single positioning mode
Position reached output
Inch/metric selection
Flexible multiplier for encoder calibration
Datum pre-set
Automatic retract
Tolerance window blanking
Unidirectional approach to position for backlash elimination
Encoder and drive failure detection
Maximum Encoder frequency 20 kHz
Memory on power down of actual Position and programme
The P8822 controller is very flexible and can be used in many applications. Depending on the
application, the controller can be set to operate in a different way. To enable the customer to
choose the features he requires, we clearly describe all the features individually and how to select
them. All the features are selected by means of Registers. The Registers are locked by means of a
security code.
Having set the registers, the operator uses the Keypad to programme length data only.
4

2. FEATURES & FUNCTIONS
Two speed operation
The positioning is effected using a two speed drive.
Fast (and slow)
creep
demand position
stop offset
slow point
R 3X/Y
R 1X/Y
Three speed operation
fast
slow
creep
demand position
stop offset
creep point
slow point
R 3
R 2
R 1
The actual position of the axis is displayed at all times and the demanded position is entered in the
bottom display. When start is pressed, the controller calculates the difference between the two
dimensions and sets the outputs to give the desired direction and speed, to move towards the
desired position.
If the distance is greater than the value set in Register R1 X/Y) the drive will first set off at high
speed. As it reaches a distance from its destination equal to R1 X/Y it will drop out the high speed
signal and the drive will drop to its low speed.
It is essential that (R1/2 X/Y ) is set such that the slow speed is steady, before the stop signal is
given. This is set during commissioning and is not a critical value. The controller will never operate
correctly, if the slow down distance is too short.
It will now run at the slow speed until it reaches a distance away from the destination, equal to
value R3 X/Y. It will now drop out in its run signal and the drive stops.
The setting of R3 X/Y is such that it is equal to a consistent overrun distance and hence the
machine should stop exactly in position, within +/- 1 bit (normally +/- 0.1mm).
2.1 Bi-directional control
This controller operates outputs that select direction of rotation of the motor. There are a number of
ways to configure the outputs to suit the type of motor being used. These outputs are tied in with
the two speed selection. Register R8/5 is used to set the appropriate output. Ten modes are
programmable.
NB For General use, the terms "forward" and "reverse" have the following meaning.
Forward - Machine moves away from zero in a positive direction ”count up”
Reverse - Machine moves towards zero from a positive dimension “count down”
These terms should not be confused on site with machinery nomenclature e.g.. a Backgauge
moves towards operator and this is termed "forwards".
5

2.2 Backlash Compensation
The P8822 controller is quite suitable for operation with mechanics having backlash, e.g. backlash
in screw. To ensure that correct positioning is achieved, when backlash is present, unidirectional
approach to position can be selected, by means of Register R8/6 X/Y.
The distance of overrun is set in Register R4 X/Y. This must be far enough to ensure full take up of
backlash and not too long to make positioning ponderous. It is essential that the value in this
register is greater than the stop offset register R3 X/Y. When the machine stops at the end of its
overrun, it is usually desirable to have a short delay. The time is set in Register R10 X/Y. The
time would normally be set to a value to ensure that motor has come to rest, before opposite
direction start is again made, e.g. to avoid plugging of an ac motor. Backlash Compensation is
never used in incremental mode.
Value 0
Value 1
Value 2
No backlash compensation
Machine goes directly to position from either direction
Negative backlash
When positioning, the last move is in direction away from zero, i.e. if a "smaller"
dimension is selected, controller overruns in direction of zero, before reversing
and making final move to position.
Positive backlash
When positioning, the last move is in direction towards zero, i.e. if a larger
dimension is selected, controller overruns in direction away from zero, before
reversing and making final move to position.
2.3 Stop Offset and Positioning Accuracy
When a stop signal is issued by the controller, the machine does not stop instantly. It overruns a
certain distance depending on friction and inertia and whether a brake is used or not. Providing a
speed low enough is used, this overrun will be consistent at all positions. It is therefore possible to
issue the stop signal that distance before demanded position. If this is done, stopping accuracy of
+/- 0.1 mm can be achieved. In the first instance, when starting commissioning, the register R3 X/Y
is set to zero and overrun noted at various positions. The average value is then set into R3 X/Y
and the machine will now stop within +/- 0.1 mm of demanded position.
6

2.4 Automatic Stop Offset Calculation and Positioning Retry
The automatic stop offset calculation and positioning retry function provides a consistently better
accuracy. If a fixed stop offset is set in the controller, it gives the desired accuracy at the time of
setting. It has however, been found that four things upset the settings
Loosening up of the machine, from its new state, i.e. the overrun increases.
Friction being different at different points in a slideway.
Wear of brakes where fitted.
Too high low speeds cause inconsistent accuracy.
This results in machine going out of tolerance after delivery to site. Elgo Electric have incorporated
automatic calculation of the stop offset. This works in conjunction with the tolerance window. When
the machine reaches position, the controller checks whether the position is within tolerance. If
it is not, it will recalculate the stop offset required to make it stop within tolerance on the next move.
e.g. Desired position 200.0 mm
Stop Offset (R3)
0.2 mm
Tolerance Window (R12) 0.1 mm
Actual Position Reached 200.2 mm
This means that the Stop Offset should be 0.4 mm. The controller notes that the actual
position is outside the tolerance (199.9 to 200.1) and changes the value of the Register R3 X/Y to
0.4. If the machine should now position with the new stop offset. This would mean that the final
position would be within +/- 0.1 mm. Here Elgo has added the feature of automatic retry
positioning. This is set by register R73 X/Y. If the value of R73 X/Y is set to zero, the controller will
operate without recalculation and without retry. If the value of R73 X/Y is set to "1" this means that
should the position reached be outside the tolerance window, the controller will recalculate the new
stop offset. Then the machine will automatically move back a distance (the pre-set Backlash value)
and reposition using the new value in R3 X/Y. It should then position spot on or at worst within 0.1
mm once more. The number of retrys may be set higher but it is not really practical to work with a
value higher than 3 (i.e. 2 retrys). If the machine cannot make its desired position within tolerance
in three goes (first and two retrys ) then there is something wrong. The value of stop offset, R3 X/Y,
should only need a limited range under normal operating conditions.
It is also possible to use single (high) speed motors and with one retry get accuracy of +/- 0.1 mm,
where previously a two speed system would have been required. This could mean the saving in
cost of an inverter for instance. When using the automatic retry system, it is necessary to set the
tolerance window at least 0.1 mm
For automatic recalculation of stop offset, it is essential that the machine is at complete standstill,
when the calculation takes place. The timer R9 X/Y (normally width of in-position pulse) has a dual
role. The time delay after stop is initiated, before calculation takes place is also equal to value set
in R9 X/Y. Therefore ensure that R9 X/Y is set long enough.
The retry sequence is inoperative on incremental moves.
7

2.5 Tolerance Window (Error blanking)
Despite the lact that accuracy of +/- 0.1 mm is achievable, the actual value display shows the error
e.g. demanded position 200.0 actual position 199.9. This sometimes worries the operator. It is
possible to enter a value into Register R12 X/Y which represents an acceptable tolerance e.g. 0.1
mm. When the actual position is within the tolerance window, the actual position displayed is
made equal to the demanded position. The actual error is not lost, as the controller knows the true
position. This is a useful feature, where errors of greater than 0.1 mm are acceptable e.g.. +/-
0.1mm. By setting R12 X/Y to 0.5 mm, the actual display may be manipulated to read 200.0 when
the actual position is between 199.5 to 200.5. This means that a "high" low speed or even a single
"high" speed motor can be used, saving money, if accuracy is not critical. Tolerance window should
only be used for absolute positioning, as only then it is meaningful to operator.
2.6 Automatic Retract and Positioning to fixed value
Some processes require the machine to move to a different position temporarily, whilst another part
of the process is taking place. This would be used for example an a sheet metal Bender, where the
Backstop has to Retract (move to a higher count value) whilst the bend is taking place.
There are three modes selectable by Register R18/2 X/Y
Value 0 : The machine retracts the distance as set in Register R5 X/Y
Value 1 : The Machine moves to an absolute position set in register R5 X/Y
Value 2 : The machine retracts for a time set on R10 X/Y whilst input is activated.
Select Value = 0 in register R18/2 X/Y. Closing contact ST.3/6 (ST.8/6), causes the axis to retract
the value set in R5 X/Y. Closing this contact again, returns axis to the original position.
Select value = 1 in register R18/2 X/Y and "0" in Register R5 X/Y. Each time ST.3/6(ST.8/6) is
activated, the axis will now go to zero position. R5 X/Y can be set to any desired value.
Select value = 2 in register R18/2. When ST.3/6 (ST8/6) is activated, the machine retracts at slow
speed for a time as set in Register R10 X/Y, on release of input, machine returns to original
position.
8

2.7 Datum Function
The setting of datum needs in principle only to be carried out once during commissioning, since the
actual positions are always remembered on power down.
The P8822 controller provides the possibility of setting the datum when operating in Absolute mode
in four distinct ways. The selection of method to be used is made in Register R8/3 X/Y.
Setting a value 0, 1, 2 or 3 gives the mode. Setting 0/1 and 3 applies to manual and value 2 to
automatic.
2.8 Manual Datum
Select Value = 0 in register R8/3 X/Y
Datum is achieved by closing the relevant input ST.3/4 (ST8/4). This should normally be an
external keys-witch, which can only be operated by an authorised person. Closing the input,
transfers the value of R7 X/Y into the actual display. This would normally be used with an axis
which can be run into a fixed stop, whose absolute position is known.
Select Value = 1 in register R8/3 X/Y
Putting each axis in turn into position, measuring that position and entering the value into actual
value display. Closing the input transfers the value in the "demand" window ("Single" mode must be
selected) into the actual value display. This is useful in applications when a random position
measurement can be readily made. Select axis required with ">" button.
Select Value = 3 in register R8/3 X/Y
This mode does not require any external Key-switch. Access Register R7 X/Y. Type in actual
position. Press E. Value is transferred to actual value display and controller automatically resets to
operation mode.
2.9 Tool Offset Compensation
When moving in incremental, it is often the case that the subsequent function is a cut that removes
part of the material e.g. Saw Blade. The finished product ends up the other side of the blade.
Thus to cut the pre-set lengths, it is necessary to move the demanded distance plus the " Tool
offset". The tool offset, or Saw blade width is set in register R6 X/Y. This is used in all forms of
incremental operation.
2.10 Incremental Error compensation
The basic accuracy of the control system is +/- 0.1 mm. This applies to each move. In absolute
positioning mode, each position will only ever be 0.1 mm out from the absolute position. In
increment-mode however, each move could be +/- 0.1 mm out. This means that relative absolute
position can be cumulatively out. When feeding material though a process this is not a problem,
since it is the cut product that is important and each part can only be +/- 0.1 mm out. No
compensation is desirable. However, if say a series of bends is being made in a sheet of metal, it is
important to hold the absolute position to +/0.1 mm. To do so " incremental error compensation"
must be selected by means of register R88/6
Value 0: off ( No Compensation)
Value 1: on ( compensation effective )
9

2.11 Double Start Input
In certain applications, it may be desirable for the P8822 not to restart the cycle at the end of the
programme. A second start input is required before movement takes place. This feature is
activated by setting R88/3 ).
Value 0 : function disabled
Value 1 : with double start.
2.12 Inch / Metric selection
The usual operating system is metric. Encoder resolution is normally chosen to match the metric
resolution required. The configuration is available by means of Register R97.
The actual position and registers are converted from "MM to Inch". A resolution of 0.1 mm is
displayed as 0.004 inch
NB. This does not change the dimensions stored in a programme
2.13 Decimal Point
The decimal point is placed in a fixed position and its optical only. It does NOT change the
resolution of the system. The selected position is achieved by use of register R20 Y/Y.
Value 0: No decimal place.
Value 1: 1 place of decimal
Value 2: 2 places of decimal
Value 3: 3 places of decimal
2.14 Encoder Multiplication factor
In general, the encoder resolution is chosen so that 1 pulse equals 0.1 mm, 0.01 mm or 1 mm. It is
not strictly necessary to do this, as a flexible multiplier is available in register R96 X/Y, to multiply
encoder pulses by any value in the range from 0.00001 to 9.99999
This multiplication factor also acts on the register values so that all dimensions are "real" values.
One point to note is that if a value greater that 1 is set, then the minimum increments in the display
go up. e.g. if the multiplier is set to "2", then the position counting will be 0,2,4,6 etc. To avoid this, it
is possible to utilise the encoder pulse edge counting multiplier of X2 or X4 set by setting
parameter R56 X/Y NB. It is essential that the encoder does not exceed 20kHz.
10

2.15 Software Limits
When working in absolute mode, there are limits of movement at both ends. It is always essential
to have mechanical end limit switches on a machine, for safety purposes. When such switches
operate, they can cause problems in resetting the machine, and should operate only when
something has seriously gone wrong with the machine. It is desirable to ensure that the operator
does not try to move to position that will operate these switches. For this purpose, software limits
are available and programmed in register R13 X/Y) ( minimum ) and R14 X/Y ( maximum ) Should
programmed values exceed these values, pressing start will not allow movement to take place
2.16 Two axis position comparator
When the P8822 is used in some applications, it is essential to monitor the relative positions of the
2 axes. Two modes are required.
Anti collision control
If two Heads are on the same slide-way, it is essential that they do not reach. > Hence it is
necessary to set a minimum dimension between them.
Balance control
If two screws are lifting a Beam, it is essential that both ends are at same height. If there is a
difference between them, both must stop. This control is effected with Register R80 and R81.
Setting R80: Value 0 : Checking mode inoperative
Value 1 : Anti-collision operation: Controller checks both positions whilst running and if distance
is less than value set in R81, stop is activated and ERROR09 info is activated.
Value 2 : Skew Detection : Controller checks both positions whilst running and if difference is
more than value set in R81, stop is activated and ERROR10 info is activated
Setting of R81: This is the value used to compare positions of the 2 axes, in accordance with
configuration of R80.
2.17 Encoder Pulse monitoring
There are a number of faults on a machine that can stop the operation i.e.
Stalled motor, Controller failure, Cable failure, Encoder failure
Should pulses fail to reach the controller after start has been given and before in position is
reached, then one of the above faults must be present. The controller monitors the pulses at
intervals set in Register R19 X/Y. If the Register R19 X/Y is set to "0", the monitoring features will
be disabled. Should a failure occur, the ERROR01 is displayed in demand position window .
11

2.19 Fault Monitoring
When a fault occurs, it’s number flashes in the demand Position Display
Fault number 01 = Encoder failure detection
04 = Demand Position < min software limit (R13)
05 = Demand Position > max software limit (R14)
08 = difference between X&Y bigger (R81)
09 = difference between X&Y bigger (R81)
11 = Eeprom storage error
13 = Program-Rom full
14 = Program steps full
Number of Programme lines greater than 99
The fault message is cleared by pressing STOP button.
12

3. CONTROLLER IN OPERATION
Front Panel
P8822
NR.
mm
Actual position
Demand position
ELGO
ELECTRIC
> > >
Hand
Single
Hand
Single
7
8 9 NR
Prog
Prog
P-End
4
5 6 >
Start
1
2 3 E
Stop
C 0 T R
Pushbuttons
Prog
T
NR
Resets the Controller. Also selects programme run mode
Resets the programme to beginning. Also used to finish editing.
Steps the programme through, line by line
> Steps through field by field (rolls over from line to line as well)
Single
Hand
E
C
Selects single run mode
Select manual mode
Ends programming (cursor light must be in "last" window)
Cancels existing value
13

3.1 Programming of the Controller
3.2 Programme Memory
There are a total of 400 address lines, which can be programmed. The number of steps in a
program is up to 99. A new programme can be selected by means of Register R40.
The values of digits in register R40 are 0 to 99 i.e. value "0" is the number 1 programme.
NB: Register R40 is accessible without Security code.
Normally, each line of programme comprises
Address number
Dimension X,Y
retract on/off information
A running programme is made up of a number of lines (or addresses). To programme, proceed as
follows
Press PROG
Press NR 01 is displayed in Address
Cursor LED below dimension X is displayed Press C
Enter dimensional data
Press > cursor LED moves to dimension Y
Press C Clears value
enter dimensional data
Press > cursor LED moves to retract on/off
enter retract on/off 0= off 1= on
Clears value
Pressing cursor again, moves the programming to the next line, i.e. Address number will increment
to 02 and the second line can be programmed. When the desired number of lines have been
programmed and the cursor LED is in the retract on/off field, Press E (for end).
3.3 Checking a Programme
Pressing T will reset programme to zero. By now repeatedly pressing "NR", the programme is
displayed line by line and can be checked. Once the last line has been reached, pressing NR again
resets programme to beginning.
3.4 Editing a Programme
If any line is to be edited, select this line by using NR. Use cursor button to select required axis.
Press C to delete value
Enter new value
Press >
The new value is now stored
Press T to reset program to beginning
14

3.5 Programme in Operation
To start at beginning, press T (or Prog). All zeros are displayed
Press Start
Address Line switching
The programme steps on to next line according the setting of Parameter R88/3. When the last line
has been executed, display resets to all zeros and programme end signal is given. Pressing Start
again repeats the process. The customer should use the end of programme signal to prevent
continuous cycling, if he so desires. Programme can also be interrupted by use of the double start
feature (Parameter R88/4). It is possible to start the cycle at any address line in a programme.
Simply step through programme using NR to the line required, and press start. It is possible
however, by using external individual axis start inputs to make individual moves of both axes.
Value 0 = at position reached
Value 1 = at start
3.6 Operating with "Fixed" programmes
Some applications are such that all 99 addresses are programmed just once and thereafter the
operator simply selects the address he requires and presses start. This configuration is selected in
register R8 value 4. The 99 lines of memory can be programmed by means of the Keypad.
The operator now operates as follows
Press NR
NR display flashes
Enter address required
Press >
Corresponding dimensions appear in demand windows
Press Start
3.7 Single Operation
It is sometimes required to position to a desired position, outside the programme. Pressing "Single"
selects this mode. Cursor LED illuminates in dimension display. The operator can now enter any
desired dimension and press start. The single move can be either absolute or incremental Positive
or Negative. (Parameter R18/3) Using the front start button, the axis selected, whose demand
value has been changed will move alone. If both changed, both will move.
15

3.8 Manual Operation
The "manual operation" is very helpful fore initial commissioning. However, it is sometimes required
to have "manual" positioning, readily accessible for operator. In such a case, in manual mode the
buttons 7, 8, 9 and NR are for jogging purposes. To select manual mode press Key Single/Hand
two times. To select the axis press > key.
3.9 Controller testing
To set up the test routines, select Register R90.
Value = 1
Set default parameter
Default values are loaded into memory.
Value = 2
Memory Clear
NB: It is essential that all Register values previously in use are noted so that they can be reentered
after the test. The memory test takes approximately four and a half minutes to run.
3.10 Memory on Power down
The programme is always memorised. On switch on it resets to beginning. The actual value display
is also memorised. The demand value in single is also memorised.
3.11 Locking out Keypad
It is often undesirable for the operator to change the programme. This can be prevented by locking
out the programming function from the keypad. This is done by Register R8/5.
Value 0 : Normal Keypad operation
Value 1 : Programming function is disabled. Closing external input ST.3/8 enabled.
Value 2 : All keypad functions disabled. Closing external input to ST.3/8 enabled.
Value 3 : As value 0, but start/stop buttons disabled.
Values 1 & 2 would normally be used in conjunction with the keys-witch.
16

4. SETTING UP OF THE CONTROLLER
4.1 Setting of Registers
The Registers are protected by means of a security code. This ensures that the operator does not
inadvertently change anything critical. In the X Axis window the Parameter of the X axis are
displayed. Equivalent in the Y Axis display the value for the Y Axis. For common parameters only
X axis display is used.
To access Registers, proceed as follows
Press PROG (i.e. reset)
Press R (Address display flashes)
Press C
Enter 98 (98 appears in address field)
Press >
Enter security code 250565 (into demand X field)
Press E
The Registers are now unlocked and can be altered.
To set Registers, proceed as follows
Press PROG
Press R (address display flashes)
Press C
Enter demand Register e.g. 10
Press >
Enter required value e.g. 20 (in demand X field)
Press >
Enter required value e.g. 25 (in demand Y field)
Press E
Any Register can be selected and changed in the above manner. If sequential Registers are to be
set, Press NR instead of E and continue editing Register by Register Press E on completion.
It is possible to run the Controller with Registers unlocked, eg having set the Stop offset Register
R03, you may now execute a “Single” move and then go back to edit R03.
To relock Registers, proceed as follows
Press PROG
Press R (address display flashes)
Press C
Enter 98
Press >
Press C
Press E
On completion they must be locked up to prevent inadvertent changes by operator. The
Registers are automatically locked on power down.
When registers are selected, the decimal point is set to the correct position for each parameter.
Distance dimension Registers are programmed in "1 display bit" i.e. if one place of decimal is
being used 1 bit = 0.1 mm. Time Registers are programmed in resolution 1 bit = 0.1 sec.
17

Register R96 X/Y has a resolution of x . x x x x x
Display 0.50000 = multiply by 0.5
Display 2.30500 = multiply by 2.305
Leading zeros are blanked when required and displayed where necessary.
Viewing Registers
It is not necessary to use the security code to check any value, simply
Press Prog
Press R
Enter demand Register e.g. 6
Press NR or >
Value of Register is displayed
Press E to exit.
Registers without Security Code
Register R6/R40/R46/R47/R98 is always accessible without security code.
4.2 Default values for Registers.
Due to customer inexperience, it is very easy to set Registers to values that will prevent complete
operation of the P8822 controller.
In parameter R88/4 different default-tables can be selected.
Value 0 = Elgo standard configuration
Value 1 = Customer 1 setting DR
Value 2 = Customer 2 setting LD
Value 3 = Customer 3 setting AD
To give a starting base for set up purposes, default values have been incorporated. If these values
are used, it will be possible to run the machine and then move on to optimise the Registers to
settings that suit the application. The selection of default Registers is done by selecting Register
R90 and entering a value of "1" then pressing "E“
18

5. Parameter List
Register Value X Axis Value Y Axis Meaning
1 Slow down 1
2 Slow down 2
3 Stop offset
4 Backlash overrun
5 Retract distance
6 Saw width/ tool offset
7 Datum value
8 System Parameter 1
8/1 Positioning mode
8/2 Option
8/3 Datum mode
8/4 Memory mode
8/5 Output configuration
8/6 Backlash compensation mode
9 In position signal 0,1sec
10 Backlash dwell 0.1 sec
12 Tolerance window
13 Min software limit
14 Max. software limit
15 Software limit inhibit
18 System Parameter 2
18/1 Serial communication port on/off
18/2 Retract mode
18/3 Positioning in single mode
18/4 Positioning in programme mode
18/5 Keypad enabled
18/6 no function
19 encoder monitoring interval
20 Decimal point
28 System Parameter 3
28/1 Front Start key mode
29 Time delay for drive inhibit
30 Time of programme end
40 Programme block selected
41 Number of lines in Prog Block 1-99
46 Programme cycle pre-selection
47 Programme cycle counter
56 Encoder Edge Multiplication
73 Stop offset calculation
80 Comparator mode
81 Comparator distance
88/1 No function
88/2 Default select
88/3 Address line switching
88/4 Double start at prog end
88/5 Output / input version
88/6 Incremental error comp.
88 System parameter 3
90 Service register
92 Display brightness
96 Multiplication set at 1.00000
97 Inch/mm selection
98 250565 Security code
19

6. Description of Registers
R01
Slow speed distance
Distance at which the controller switches from high speed to slow speed. The output high
speed will be switched off.
R02
Creep speed distance
Distance to demand position at which the controller switches from slow to creep speed
R03
Stop offset distance
The overrun distance can be programmed to compensate for distance from the switch-off
point of the motor to standstill. For exact positioning, the overrun distance should be very
small (0.0 to 0.5 mm). Therefore the mechanical friction should be steady and the creep
speed should be very slow.
During commissioning, first set R12 to zero (to eliminate Tolerance window blanking), then
set the value of R03 to 0.0 and execute a number of moves in both directions. Note the
average overrun distance and then set R03 to that value. Then set R12 to suit.
R04
Backlash overrun
To correct for screw or pinion backlash, the Demand position should be approached from
one direction only. In positive direction therefore, the Demand position will be overrun by the
value of R4 and driven back at creep speed after a time delay of R10, to the Demand
position.
R05
Retract distance
There are different modes available in the P8822, selectable by Register R18/2.
If R18/2 = 0
If R18/2 = 1
If R18/2 = 3
Retract Position = Actual + R5
Retract Position = Value of R5
Retract whilst input activate, return on deactivation
When input St3/6 ST8/6 is activated, the slide moves to position as set in R5 but will not
return to original position on release of input. (Value 1)
Whilst the input St3/6 ST8/6 is held on, the slide will move to the “Retract” position. On
release of input, slide will return to the original position. (Value 3)
R06
Tool offset compensation
This Register can be accessed without Security Code. When moving in incremental, it is
often the case that the subsequent function is a cut that removes part of the material. Thus
to cut the correct pre-set lengths, it is necessary to move the demanded distance plus the
“Tool Offset”. This feature is active in incremental mode.
20

R07
Datum
This Register can be accessed without Security Code. The Datum value is stored in this
Register. The value is used in different ways, in accordance with setting of P8/3 X/Y. Input
St3/4 and St8/4 initiates loading.
R08 System Register 1
This Register sets the basic operating functions of the unit.
Demand Window
1 2 3 4 5 6
Backlash
0 = no backlash compensation
1 = negative backlash comp
2 = positive backlash comp
Output Relay Config
3 = 3 speed operation Elgo Standard mode
7 = 2 speed operation independent output (LD)
8 = 2 speed operation independent (AD)
9 = 2 speed Run/reverse slow/fast (DR)
Programme Memory
0 = Sequential Programme
1 = Table selection
Datum
0 = Datum to R7
1 = Datum to Demand
3 = Datum to R7 by keypad
Option
Type of positioning
0 = Analogue positioning (Option)
1 = Fast/slow/stop
21

Relay Configurations 8/5
These depend on setting of Register R8/5
Value 3
3 speed operation (Elgo standard)
speeds selected by relays 3/8,4/9 Relay 5/10 sets direction reverse
RELAY 2/7 3/8 4/9 5/10
Creep forwards
X
Slow forwards X X
Fast forwards X X X
Creep reverse X X
Slow reverse X X X
Fast reverse X X X X
R2/7 = Run. R3/8 = Slow & R4/9 = Fast combined with Run.
Value = 7
2 speed operation, Independent outputs for direction and speed
RELAY 2/7 3/8 4/9 5/10
Creep forwards
X
Slow forwards
Fast forwards
X
Creep reverse
X
Slow reverse
Fast reverse
X
Value 8
2 speed operation Independent outputs forward and reverse
Independent outputs fast and slow
RELAY 2/7 3/8 4/9 5/10
Creep forwards X X
Slow forwards
Fast forwards X X
Creep reverse X X
Slow reverse
Fast reverse X X
R2/7 = Forwards, R3/8 = Reverse R4/9 = Creep, R5/10 = Fast, combined with forward and reverse
(but independent)
Value 9 2 speed operation Speed set by Relays 3/8 & 4/9 Direction set by Relay 5/10
RELAY 2/7 3/8 4/9 5/10
Creep forwards X X
Slow forwards
Fast forwards X X
Creep reverse X X X
Slow reverse
Fast reverse X X X
R4/9 = Creep, R 5/10 = Fast (both independent)
22

R09
Time position reached
At the end of each move, the controller gives an output, to signal “in position”. The length of
this pulse is set in R9. Setting 0.0 gives a maintained output.
R10
Backlash dwell time
When the machine stops at the end of the overrun, it is usually desirable to have a short
delay. The time is set in this Register.
R12
Tolerance window
It is possible to enter a value in Register R12 that represents an acceptable tolerance e.g.
0.1 mm. When the Actual Position is within the Tolerance window, the Actual position
displayed is made equal to the Demand position. The actual error is not lost, as the
controller knows the true position.
Example: R12 = 0.2
Therefore tolerance window is +/- 0.2mm
Display without Tolerance set
Display with Tolerance set
Aktual Display
Demand Display
R13/ R14 Min/Max software limits
Demand < Limit R13 =
Demand > Limit R14 =
ERR04 Fault Message
ERR05 Fault Message
Single Operation
Immediately after start signal, the controller checks the software limits. If the Demand
position is greater or smaller than the corresponding limit, the controller will stop and show
the error message on the display. The backlash distance in R4 is considered at the check of
the Max software limit, if the backlash is activated in R8/6 X/Y.
Hand Operation
The movement will stop when software limits are reached. If moving at high speed, the drive
will drop to creep speed at a distance set in R1 from this limit. This prevents running into the
ends of the machine. The end limit values are modified by backlash value as set in R4, if
R8/6 X/Y is selected.
R15
Software Limit Selection
Software limits (R13 & R14) are active in accordance with the setting of R15/6
xxxxx0
xxxxx1
xxxxx2
xxxxx3
Both software limits active
Min software limit (R13) inhibited
Max software limit (R14) inhibited
Both software limits (R13&R14) inhibited
23

R18 System Register 2
This Register also sets the functions of the controller.
Demand Window
1 2 3 4 5 6
Option
Keyboard protection
0 = Enabled
1 = Programming disabled
2 = All keyboard function disabled
3 = Memory and start/stop disabled
Positioning in Prog
0 = Absolute
1 = Incremental +ve
2 = Incremental -ve
Positioning in single
0 = Absolute
1 = Incremental + ve
2 = Incremental – ve
Retract mode
0 = retract to Actual + P5 setting value
1 = retract to absolute position in P5
2 = retract whilst input active Return on deactivation
Serial link
0 = none
R19
Encoder monitoring
If after positioning is initiated, no Encoder pulses are sensed after a time set in R19,
positioning will be aborted and Fault ERROR01 will be displayed. Setting R19 to 0.0,
disables Encoder pulse monitoring.
R20
Decimal Point
The decimal point is placed in a fixed position and is optical only. It does not change the
resolution of the system..
R20 = xxxxx0 = without
R20 = xxxxx1 = 1/10
R20 = xxxxx2 = 1/100
R20 = xxxxx3 = 1/1000
24

R28 System Register 3
This Register also sets the functions of the controller.
Demand Window
1 2 3 4 5 6
Option
0 = Front-panel Start X and Y axis
1 = Front panel Start only axes selected with courser
R29
Time Delay for Drive inhibit (Positioning)
On activating start, output Positioning is activated. On arriving in position, after a time delay
of R29 this output deactivates.
R30
Time of Program end signal
If last step of program is completed, the signal program-end is activated for the time
programmed in this register.
R40
Programme Block selection
This Register can be accessed without opening Security Code in R98. The Programme
Block required for operation should be entered. (0-99)
R41
Number of Lines in each Programme Block
Enter the number of lines required per Programme Block (1 – 99). The number of Blocks
will be calculated automatically.
Example : Total number of Lines = 200, Number of Lines required per Block = 25
(enter 25 into R41). Therefore number of Programme blocks = 8
R46
Program Cycle-pre selection
To limit the execution of the programme the cycle counter can be set. If the Register R47
(Cycle counter) is equal the pre selection the signal ready will drop off. To Disable the
counter set R46 to zero.
R47
Program Cycle counter
When the cycle counter is complete. i.e. R46 equal to R47 the output ready drop of and
cycle count is displayed in actual position window. The external and front panel Start are
disabled. To clear the output to allow positioning again R47 must be set to zero. For
temporary unlock press Stop. The one more programme cycle can be done. After
completing this programme new counter value is displayed and ready drop of again.
R56
Encoder Edge Multiplication
1 = x1 2 = x2 4 = x4
Entry of any other value will automatically select 1
25

R73
Automatic Stop Offset Calculation and Positioning Retry
If the value of R73 X/Y is set to zero, the controller will operate without recalculation and
without retry. If the value of R73 X/Y is set to "1" this means that should the position
reached be outside the tolerance window, the controller will recalculate the new stop offset
but no retry. If R73 is set to any value bigger than “1” the controller will also retry.
R80
Two axis position comparator
Two modes are required. Anti collision control and Balance control
Setting R80: Value 0 : Checking mode inoperative
Value 1 : Anti-collision operation.
Value 2 : Skew Detection
R81
Comparator distance
Controller checks both positions whilst running and if difference is bigger than value set in
R81, stop is activated and ERROR09/ERROR10 info is activated.
R88 System Register 4
This Register sets further basic functions of the controller.
Demand Window
1 2 3 4 5 6
Incremental error comp
0 = not active
1 = active
Output / Input Version
0 = D-Sub connector
1 = Relays output / Ria type input
Double start at Prog end
0 = without
1 = with
Address Line switching
0 = at position reached
1 = at start
2 = at position reached (Reset to Line 1 at prog end)
Default selection
0 = Elgo standard (EL)
1 = Customer 1 (DR)
2 = Customer 2 (LD)
3 = Customer 3 (AD)
Option
26

R90 Service register
Only active when P98 is unlocked. Select button as shown below:
Button 1 - Pressing this button loads default values into all Parameters
Button 2 – Clear memory
R92 Display brightness
With the setting of this Parameter, the brightness of the display can be altered.
0.0 = dark, 9.9 = max brightness.
R96
Encoder Pulse Multiplier
A factor (0.00001 to 9.9999) can be entered in this Register. The incoming pulses will be
multiplied by this factor, to manipulate the display to required dimensions. If no
multiplication is required, this Register must be set to 1.00000.
R97
Inch/ MM selection
This Register sets the metric ore inch mode. The register setting has priority to the external
selection of the input. Active in AD and LD default.
Demand Window
1 2 3 4 5 6
Option
0 = mm mode
1 = Inch mode 0,001 inch resolution
R98
Security Code
Enter 250565 to unlock and change Parameters
27

7. Terminal layout P8822-001-R
ST9
1
2
3
FUSE 0,4A
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
ST4 ST6
ST1
1
6
9
5
ST2
1
6
9
5
ST3
1
2
3
4
5
6
7
8
ST8
1
2
3
4
5
6
7
8
ST 4 Output Relays 1-5 X
PIN Configure 3 (EL) Configure 7 (LD) Configure 8 (AD) Configure 9 (DR) Relays
1 - 2 Axes in position Axes in position Axes in position Axes in position R1
3 – 4 Run X Creep reverse X Forward X Run X R2
5 – 6 Slow X Creep forward X Reverse X Reverse X R3
7 – 8 Fast X Fast reverse X Slow X Slow X R4
9 - 10 Reverse X Fast forward X Fast X Fast X R5
ST 6 Output Relays 6-10 Y
PIN Configure 3 (EL) Configure 7 (LD) Configure 8 (AD) Configure 9 (DR) Relays
1 - 2 Ready X+Y Positioning Ready X+Y Ready X+Y R6
3 – 4 Run Y Creep reverse Y Forward Y Run Y R7
5 – 6 Slow Y Creep forward Y Reverse Y Reverse Y R8
7 – 8 Fast Y Fast reverse Y Slow Y Slow Y R9
9 - 10 Reverse Y Fast forward Y Fast Y Fast Y R10
ST 3 Input signals
PIN Standard 0 (EL) Customer 2 (LD) Customer 3 (AD) Customer 1 (DR)
1 0 Volt 0 Volt 0 Volt 0 Volt
2 Start X/Y NC Start X/Y Start X/Y
3 Stop X/Y Stop X/Y Stop X/Y Stop X/Y
4 Datum X Datum X Datum X Datum X
5 Inch/mm X/Y NC Inch/mm X/Y Inch/mm X/Y
6 Retract X Retract X Retract X Retract X
7 Cycle counter Sequential start Cycle counter NC
8 Write enable Write enable Write enable Write enable
28

ST 8 Input signal
PIN Standard 0 (EL) Customer 2 (LD) Customer 3 (AD) Customer 1 (DR)
1 0 Volt 0 Volt 0 Volt 0 Volt
2 NC NC NC NC
3 NC NC NC NC
4 Datum Y Datum Y Datum Y Datum Y
5 Start X NC Start X Start X
6 Retract Y Retract Y Retract Y Retract Y
7 NC NC NC NC
8 Start Y NC Start Y Start Y
ST 1/2 Encoder Input
PIN
FUNCTION
1 0 V
2 +24 VDC
3 A Channel
4 B Channel
5 Screen
8 Maker pulse
ST 9 Power supply
PIN
FUNCTION
1 115VAC/230 VAC
2 115VAC/230 VAC
3 Earth PE
29

8. Technical Data
Power Supply 230/115 VAC +/-15%
Consumption
Encoder supply
Input Signals
Outputs
Memory
Connectors
Display
Hardware
System accuracy
Count Frequency
Enclosure
20VA
+24v dc 130 mA max
NPN negative logic : connect inputs to common 0v
(option PNP – if specified at order stage only)
minimum time of input signal : 300 ms
input current : 10 mA max
relay contact 250v 0.3A – suppress external coils
Eeprom no Lifetime limit
D-Sub
7 segment LED 10 mm high
16 bit microprocessor with 32K E-Prom and 16K RAM
+/- 1 increment
20 kHz (higher on request at order stage)
ie with 0.1 mm resolution it gives 60 m/min
Black metal, for fitting into control panels
144W x 144H x 60D plus 30mm for connectors
Cut-out 138 x 138
Ambient temperature
0 to +50 deg C
WARNING
NB All relays, contactors, solenoids, brakes etc. must be suppressed with either diodes (for dc) or
RC networks (for ac). If this is not done, Elgo cannot guarantee correct operation.
30

9. SETTING UP AND COMMISSIONING
9.1 Installation Hints
Elgo electric controllers are constructed to the latest standards of technology and protected against
electrical “noise”.
To enable the controller to operate successfully, the following instructions must be carried out.
Location
Power Supply:
Cable:
Screening:
The unit must not be mounted in vicinity of high inductive or
capacitive powers or static electricity.
For 230v single phase supply, avoid using the same feed as to motors or
contactors. Otherwise fit a Filter.
All low voltage cables must be run separately from power cables.
All external signal cables must be screened
1.Encoder cable
2.Input signal cable
3.Output signal cables
4.Power Supply dc cables
5.Analogue signal cables
All screens must be connected to a common earth point,. Only at one side. (Controller side)
NB: Do not connect zero line to earth
Suppression:
To avoid electronic noise. Suppress all coils in the cabinet and on
Machine.
1. RC network for ac coils (e.g. 0.1 micro F+ 100 ohms)
2. Freewheel diode for dc coils
3. RC or similar suppresser for motor power lines and Brakes.
31

10. Ordering Codes
P 88 2 2 – 000- 230 –XY – R-EN-XXX
P = Position Controller
Series
P8822 with Programme memory
Programme Memory
1 = none
2 = with
Number of Axes
Construction
000 = standard
001 = 1 st special version
etc
Supply voltage
024 = 24 V DC
115 = 115 V AC
230 = 230 V AC
Encoder input
0 = A/B 24V/24V 20KHz PNP
1 = A/B/0 24V24V 20KHz PNP
* 2 = 5 V line receiver
* 3 = 5V line receiver with index input
8 = A/B 24V /24 neg. logic NPN
Special Features
* P = Analogue closed loop for X axes
R = Relay output
EN = input NPN
* S= Serial communication link RS232
*under construction
32