12LS Controller Installation and Operation Manual, Rev 3 ... - Watlow

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3.3 ANALOG INPUTSConnecting analog signals to the ANAFAZE 12LS is normally straightforward. Most thermocouples can be directlyconnected and mixed in any order. Other types of analog signals such as mAdc or Vdc require scaling resistorsinstalled on the 12LS inputs. However, some problems may occur that could reduce accuracy and possibly damage theunit. Sections 3.1 through 3.4 indicate some of the potential areas for concern. [See typical input DIAGRAM insection 3.13].3.3.1COMMON MODE VOLTAGECommon mode voltage is the voltage between the ground at the sensor and the ground at the ANAFAZE 12LS. It canbe an AC or DC voltage and appears equally at the high and low input terminals. Frequently it is caused by largecurrents flowing in the ground path between the 12LS and the sensors. The effects are minimized by using isolatedsensors or ungrounded thermocouples. Since the 12LS uses common ground inputs, if grounded sensors are used, anycommon mode voltage will cause current flow in the sensor leads and reading errors.3.3.2NORMAL MODE VOLTAGENormal mode voltage appears across the terminals of the input and is the signal from the sensor plus any undesirablenoise. The major cause of this noise is AC power line pick-up. The effects are reduced by the ANAFAZE 12LScapacity to integrate the signal over a multiple of the power line frequency. Further reduction can be achieved bylocating the 12LS near the sensors and by using twisted and shielded sensor wires. To ensure accurate readings, themaximum of normal mode plus signal should not exceed -10mv to +60mv.3.3.3GROUNDINGFor best accuracy, observe the grounding recommendations for connecting each input and output signal. The analogsignal grounds should be connected to the analog ground terminals. The communication and control outputs shouldbe connected to their respective grounds. Do not mix the grounds or connect them together. If possible, route theanalog signal cables separately from the communication, control and power cables.3.3.4 SOURCE IMPEDANCEEach sensor has a certain output impedance which is effectively connected across the ANAFAZE 12LS input amplifierwhen a measurement is made. To reach the rated accuracy, the maximum source impedance should not exceed 500ohms. Consult ANAFAZE for operation with higher source impedance.3-10
3.3.5 INPUT SCALINGThe ANAFAZE 12LS contains an area that can be used to install resistors to scale input voltages and convert milliampinputs to match the -10 to 60mv (-16.7% to 100%) input range. The input circuit is designed to enable connection ofcurrent inputs (such as 4 to 20ma), and voltage inputs. ANAFAZE will supply input scaling as needed -- order option12LS-SI-XX. The input circuit is shown below:The location of RA and RB for each input is shown on the following table:is shorted by a jumper on the PC board, remove this jumper to install RA.RAResistors should be 0.1% metal film, 1/4 watt. Note that the resistors must be stood on end due to the compact size ofthe unit. Other components such as capacitors can be installed for signal conditioning. Please consult ANAFAZE.The PC board silk screen shows the resistor locations.3-11
Page 1 and 2: ANAFAZE 12LSInstallation And Operat
Page 3 and 4: WARNINGANAFAZE HAS MADE EFFORTS TO
Page 5 and 6: 4.4 OPERATIONAL MENUS..............
Page 7 and 8: vii
Page 9 and 10: The ANAFAZE 12LS front panel provid
Page 11 and 12: Digital Inputs and Outputs Expand V
Page 13 and 14: 2.2 Control CapabilityNumber of Loo
Page 15 and 16: 3.0 INSTALLATIONThere are some prec
Page 17 and 18: 1/8th DIN HOUSING3-3
Page 19 and 20: 4. Use Thermocouple Extension Wire
Page 21 and 22: 3. Separate the 120 vac power leads
Page 23: REMOTE TERMINAL BLOCK CONNECTIONSTh
Page 27 and 28: WARNINGUse of the grounded T/C, mea
Page 29 and 30: 3.4.1 PID CONTROL AND ALARM OUTPUTS
Page 31 and 32: 3.5.3 RS-485 DESCRIPTIONThe EIA Sta
Page 33 and 34: ANAFAZE 12LS connections for a sing
Page 35 and 36: |- - - - - - - - - - - - - -|Back|-
Page 37 and 38: 4.2 DISPLAYSOn power-up the control
Page 39 and 40: |----------------------------------
Page 41 and 42: 4.3 GENERAL PROGRAMMING AND EDITING
Page 43 and 44: 4.4.2 SET LOOP TO MANUAL/AUTOTo tog
Page 45 and 46: LOOP SETUP DATA|-------------------
Page 47 and 48: The menu appears as:|--------------
Page 49 and 50: 4.5.1.6 POWER UP OUTPUT STATUSThis
Page 51 and 52: Press YES to select the menu or NO
Page 53 and 54: The display appears as :|----------
Page 55 and 56: The low input reading is referenced
Page 57 and 58: 4.5.3.1 PROPORTIONAL BANDThe first
Page 59 and 60: |----------------------------------
Page 61 and 62: Press UP and DOWN to set the maximu
Page 63 and 64: 4.5.5.4 DEVIATION BAND ALARMThis me
Page 65 and 66: Press ENTER to store the status or
Page 67 and 68: 4.6 RAMP AND SOAK OPTIONThe ramp an
Page 69 and 70: +----------------------------------
Page 71 and 72: 4.6.3 PROFILE STATUS DISPLAYWhether
Page 73 and 74: An example display follows:|-------
Page 75 and 76:
|----------------------------------
Page 77 and 78:
PROFILE SETUP GUIDE4-44
Page 79 and 80:
UP/DOWNSelect a profile designator
Page 81 and 82:
When any segment is out of toleranc
Page 83 and 84:
4.7.6 EDIT EXTERNAL RESETFrom this
Page 85 and 86:
YESChange current setpoint setting.
Page 87 and 88:
4.7.13 EDIT SEGMENT TRIGGERSUse thi
Page 89 and 90:
4.7.16 EDIT TRIGGER LATCH STATUSDis
Page 91 and 92:
4.7.19 EDIT PROFILE CYCLESThis menu
Page 93 and 94:
5.1.5 DISTRIBUTED ZERO CROSSINGDist
Page 95 and 96:
There is no tuning step for the Out
Page 97 and 98:
5.2.6 GENERAL PID CONSTANTS BY APPL
Page 99 and 100:
7.0 TROUBLE SHOOTING INFORMATION7.1
Page 101 and 102:
If ANASOFT runs then the next step
Page 103 and 104:
Data Boundary ErrorThis Error Code
Page 105 and 106:
The following examples show the out
Page 107 and 108:
Cycle TimeDeviationAlarmThe time ba
Page 110:
Congratulations! You have obtained
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12LS Controller Installation and Operation Manual, Rev 3 ... - Watlow

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