Micromod MOD: Modcell 2050R MODBUS Communications - Manual (Page 35)

IB-23C650M
BASIC OPERATION WITH A HOST DEVICE
Diagnostic Messages
The controller provides diagnostic messages which alert the user to
communication problems . The Diagnostic messages are displayed on
the TAG line. When one or more unacknowledged messages exist, the
red LED on the ALARM key flashes, the message alternates with the
TAG on the top display, and the beeper sounds if configured to do so.
This activity continues until all diagnostic conditions are either
acknowledged or no longer active. When only acknowledged diagnostic
messages exist, the red LED is steady and the tag display shows only
the tag.
Press the alarm key to view messages and acknowledge any
unacknowledged conditions using the UP key.
Communication problems are indicated by the following diagnostic
messages:
• [CMP INHB]
RS-485 bus write messages have been locked out by the operator.
• [CMP ERR]
One or more framing, parity, crc, etc. errors has occurred on RS-
485 bus.
• [OVERCFGD]
Instrument is unable to complete all configured tasks in less than
250 msec. (operation will continue, but time based activities will be
in error).
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