Transmitter Does Not Communicate; Api Referral Problems - Emerson Micro Motion 4200 Configuration And Use Manual

Troubleshooting
April 2019
15.2.52 Watchdog Error
Alert
Electronics Failed
Cause
The watchdog timer has expired.
Recommended actions
1. Reboot or power-cycle the transmitter to see if the alert clears.
2. If the alert persists, replace the transmitter.
3. Contact customer support.

15.3 Transmitter does not communicate

If the transmitter does not appear to be communicating, the wiring may be faulty or the communications
device may be incompatible.
• For HART network communications, perform the procedures in later topic to be linked.
• For communication using a communication device, check the wiring and the communication device. Refer
to either Using ProLink III with the transmitter
If you can read data from the transmitter but cannot write data (that is, you cannot start, stop or reset
totalizers or change transmitter configuration), check to see if the transmitter is write-protected, and disable
write-protection if required.

15.4 API referral problems

15.4.1 Extrapolation alert is active
Cause
Line pressure, line temperature, or line density is outside the range of the configured API table.
Recommended actions
1. Check your process conditions against the values reported by the device.
2. Verify the configuration of the API referral application and related parameters.
15.4.2 Inaccurate referred density reading
Cause
• Inaccurate density measurement
• Inaccurate temperature measurement
• Incorrect reference conditions
• Incorrect API table selection
174
or Using a Field Communicator with the
Configuration and Use Manual
MMI-20048166
transmitter.
Micro Motion 4200 Transmitters