Emerson Micro Motion 2700 Configuration And Use Manual page 223

Table 12-2: Status alarms and recommended actions
Alarm code Description
A026 Sensor/Transmitter Communi-
cations Failure
A027 Security Breach
A028 Core Processor Write Failure
A029 PIC/Daughterboard Communi-
cations Failure
A030 Incorrect Board Type
Configuration and Use Manual
(continued)
Recommended actions
The transmitter has lost communication with the core processor
on the sensor. This alarm can be an indication of a problem with
the core or the transmitter requiring the replacement of one or
both parts.
1. Check the wiring between the sensor and the transmitter.
a. Using the installation manual for your transmitter, verify
that the transmitter is connected to the sensor according
to the instructions. Obey all safety messages when open-
ing wiring compartments.
b. Verify that the wires are making good contact with the
terminals.
c. Perform RTD resistance checks and check for shorts to
case (see Section 12.28.1).
d. Check the continuity of all wires from the transmitter to
the sensor.
2. Check the core processor LED.
3. If no definite correctable cause was found, replace the core
processor.
a. If the problem persists, put back the original core pro-
cessor and replace the transmitter.
b. If the problem still persists, replace both the transmitter
and core processor.
1. Check the HART device ID.
2. The transmitter has a weights and measures security feature
that is currently set to "unsecure." Set the transmitter to "se-
cure" to clear the alarm. An authorized procedure may be re-
quired to resecure the transmitter.
There has been a failure in the transmitter electronics. Try cy-
cling power to the meter to see if the alarm clears. If the alarm
persists, replace the core processor.
This can be an indication that there has been a loss of communi-
cation between the transmitter and the display module. Try cy-
cling power to the meter to see if the alarm clears. If possible, re-
place the display module.
The firmware or configuration loaded in the transmitter is in-
compatible with the board type. If this alarm occurred in con-
junction with an effort to load a configuration into the transmit-
ter, confirm that the transmitter is of the same model as the one
the configuration came from.
Try cycling power to the meter to see if the alarm clears. If the
problem persists, contact Micro Motion for additional assis-
tance.
Troubleshooting
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