Emerson AMS Trex Device Communicator User Manual page 156

Fieldbus Diagnostics application
September 2021
156
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Status
CHECK
INACTIVE
Default status labels for the DC voltage measurement
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Description
The measurement is greater than the maximum value or less than
the minimum value defined the measurement criteria.
The CHECK status is used for the noise and signal measurements
because the measurements may be GOOD or BAD depending on the
location of where the measurement is taken and on the fieldbus
segment's tolerance to noise.
For example, if the device's signal measurement is 400 mV (peak-to-
peak) and the Trex unit was connected near the device, the
measurement is low and may be considered BAD. However, if the
Trex unit was connected to the fieldbus segment far away from the
device, the lower signal measurement is expected due to the length
of the cable and it can be considered GOOD.
The Trex unit is detecting no fieldbus communication. Tap Go
Online to communicate with the device.
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