Omron SX inverter manual

Default settings of the Run/Stop/
Enable/Reset functions
The default settings are shown in Fig. 28. In this example
the VSD is started and stopped with DigIn 2 and a
reset after trip can be given with DigIn 8.
STOP
(STOP=DECEL)
OUTPUT
SPEED
t
RunR
Reset
+24 V
X1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
ENABLE
OUTPUT
SPEED
t
(06-F104_NG)
(or if Spinstart is selected)
Fig. 28 Default setting Run/Reset commands
The inputs are default set for level-control. The rotation
is determined by the setting of the digital inputs.
Enable and Stop functions
Both functions can be used separately or simultaneously.
The choice of which function is to be used
depends on the application and the control mode of
the inputs (Level/Edge [21A]).
NOTE: In Edge mode, at least one digital input must be
programmed to “stop”, because the Run commands are
otherwise only able to start the VSD.
Enable
Input must be active (HI) to allow any Run signal. If the
input is made LOW, the output of the VSD is immediately
disabled and the motor will coast.
!
CAUTION: If the Enable function is not
programmed to a digital input, it is considered
to be active internally.
Stop
If the input is low then the VSD will stop according to
the selected stop mode set in menu [33B] Stop Mode.
Fig. 29 shows the function of the Enable and the Stop
input and the Stop Mode=Decel [33B].
To run the input must be high.
NOTE: Stop Mode=Coast [33B] will give the same
behaviour as the Enable input.
X
Fig. 29 Functionality of the Stop and Enable input
Reset and Autoreset operation
If the VSD is in Stop Mode due to a trip condition, the
VSD can be remotely reset by a pulse (“low” to “high”
transition) on the Reset input, default on DigIn 8.
Depending on the selected control method, a restart
takes place as follows:
Level-control
If the Run inputs remain in their position the VSD will
start immediately after the Reset command is given.
Edge-control
After the Reset command is given a new Run command
must be applied to start the VSD again.
Autoreset is enabled if the Reset input is continuously
active. The Autoreset functions are programmed in
menu Autoreset [250].
NOTE: If the control commands are programmed for
Keyboard control or Com, Autoreset is not possible.
Run Inputs Level-controlled.
The inputs are set as default for level-control. This
means that an input is activated by making the input
continuously “High”. This method is commonly used if,
for example, PLCs are used to operate the VSD.
!
CAUTION: Level-controlled inputs DO NOT
comply with the Machine Directive, if the inputs
are directly used to start and stop the machine.
The examples given in this and the following paragraphs
follow the input selection shown in Fig. 30.
38 Main Features Omron SX inverter manual