Emerson Micro Motion 5700 Configuration And Use Manual page 197

Configuration and Use Manual
MMI-20029769
Recommended actions
1. Verify the wiring between the Discrete Output and the valve. The ON signal must open the valve.
Perform a loop test.
2. Change the setting of Discrete Output Polarity.
17.4.3 Valve does not operate
Cause
• Discrete Output wiring is incorrect
• Discrete Output channel is set up for internal power
Recommended actions
1. Verify the wiring between the Discrete Output and the valve. The ON signal must open the valve.
Perform a loop test.
2. Ensure that the channel is wired and configured for external power.
3. Ensure that the valve and channel are powered.
17.4.4 Batch totals are inaccurate
Cause
• Batch target is incorrect
• AOC is inaccurate
• Flow measurement needs adjustment
Recommended actions
1. Verify that the correct batch preset is active.
2. Verify that the batch target is set correctly.
3. If you have recently changed the batch target, run a few batches and wait for the AOC value to adjust.
4. Repeat AOC calibration.
5. Adjust the fixed AOC value.
6. Compare the batch total to a scale reading.
17.4.5 ts BatchRepeatNotSatis
Cause
• AOC is inaccurate
• Inconsistent or leaking valve
• Process is unstable
Recommended actions
1. Inspect the valve and replace if necessary.
2. Repeat AOC calibration.
Configuration and Use Manual
Troubleshooting
March 2019
197