Emerson ROC827 - Manual (Page 119)

ROC827 Instruction Manual
Issued Mar-06 Troubleshooting 6-7
9. Remove the test equipment.
6.3.4 Troubleshooting Analog Output Modules
Equipment Required:
ƒ Multimeter.
ƒ PC running ROCLINK 800 software.
Caution
Failure to exercise proper electrostatic discharge precautions, such as
wearing a grounded wrist strap may reset the processor or damage
electronic components, resulting in interrupted operations.
To calibrate the module:
1. Connect a multimeter between the + and – channel terminals of the
module and set the multimeter to measure current in milliamps.
2. Connect to ROCLINK 800 software.
3. Select Configuration > I/O > AO Points.
4. Select the correct Analog Output Point Number.
5. Select Scanning Manual and click Apply.
6. Set the output to the High Reading EU value.
7. Verify a 20 mA reading on the multimeter.
8. Set the output to the Low Reading EU value and click Apply.
9. Verify a 4 mA reading on the multimeter.
10. Calibrate the Low Reading EU value by increasing or decreasing the
Adjusted D/A 0% units value.
11. Select Scanning Enabled and click Apply.
12. Remove the test equipment, and reconnect the field device.
13. If possible, verify the correct operation of the AO module by setting
the High Reading EU and Low Reading EU values as before
(Scanning Disabled) and observing the field device.
6.3.5 Troubleshooting Discrete Input Modules
Equipment Required :
ƒ Jumper wire
ƒ PC running ROCLINK 800 software
Caution
Failure to exercise proper electrostatic discharge precautions, such as
wearing a grounded wrist strap may reset the processor or damage
electronic components, resulting in interrupted operations.
1. Disconnect the field wiring at the DI module terminations.