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TruePort Utility 224
API I/O Access Over TruePort
Error Codes
Code Name Description
01 Illegal Function The function code received in the query is not an allowable action for
the server (or slave).
02 Illegal Data
Address
The data address received in the query is not an allowable address for
the server (or slave).
03 Illegal Data Value A value contained in the query data field is not an allowable value for
server (or slave).
04 Slave Device
Failure
An unrecoverable error occurred while the server (or slave) was
attempting to perform the requested action.