American Magnetics 187 Self-Compensating Liquid Level Controller - Manual (Page 60)

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Remote Interface Reference
Error Messages
4.6.2 Query Errors
-201,"Unrecognized query"
The query string sent (identified as a query by a ? ) was not identified as
valid. Check the query string for invalid characters or separators, syntax
errors, or for errors in the mnemonics. Spaces are not allowed before or
after colon separators.
-202,"Query interrupted"
A new query was processed before the return string of a previous query
had been completely transmitted to the host. The new query clears the
remaining data and replaces it with the new return string.
-203,"Query for length in percent"
The operator attempted to query for the zero offset or measured span in
remote units of percent. The remote units must be inches or centimeters.
4.6.3 Execution Errors
-301,"Input overflow"
The four input buffers are all occupied with unprocessed commands or
queries. The command or query is lost. Review the handshaking section on
page 36 for directions for avoiding input overflow errors.
-302,"Error buffer overflow"
More than 10 errors have occurred. For further errors to be recorded in the
internal buffer, at least one error must be cleared.
4.6.4 Device Errors
-401,"Checksum failed"
The non-volatile memory which stores the calibration data for the Model
187 is corrupted. Contact an Authorized AMI Technical Representative for
further instructions. Do not continue to use the Model 187 for level
measurements.
-402,"Serial framing error"
The baud rate of the Model 187 and host device are not identical. Both the
Model 187 and host device must be set to the identical baud rate.
-403,"Serial parity error"
The number of data bits and/or the parity of the Model 187 and the host
device are not identical.