Rockwell Automation AADvance Controller Troubleshooting and Maintenance Manual - Manual (Page 18)

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2-4 Document: 553634
(ICSTT-RM406F_EN_P) Issue: 089:
Troubleshooting and Maintenance Manual (AADvance
Controller)
Check Ground Connection
To check the controller ground connection, do the following:
 Measure the resistance of the connection to the ground stud on the 9100
processor base unit. It should be less than 0.2
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Check Analogue Input Module Calibration
The AADvance controller detects possible calibration drift by continually checking its measured input
values. The controller uses diverse hardware to compare two measurements. It is recommended that
you carry-out this calibration drift check every two years. You can verify that an analogue input is
within the stated accuracy (±0.05mA) without taking a module out of service.
To check the analogue input module calibration, do the following:
1) Use the AADvance Workbench to lock the input channel.
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The present input value freezes, allowing the process to continue operating.
2) Disconnect the field device at the termination assembly and connect a calibrated
current simulation instrument in its place.
3) Set the current simulation instrument to provide 4mA, verify that the input value is
in the range 3.95 to 4.05mA.
4) Set the current simulation instrument to provide 12mA, verify that the input value
is in the range 11.95 to 12.05mA.
5) Set the current simulation instrument to provide 20mA, verify that the input value
is in the range 19.95 to 20.05mA.
6) Disconnect the current simulation instrument and reconnect the field device.
Note: Apply a minimum tightening torque of 0.5 Nm (0.37 ft lb) to the terminal
screws.
7) Verify that the field device is reading an acceptable value.
8) Unlock the input channel.
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The input is back in service.