Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) System, I/O and Communications Functions - Manual (Page 249)

Logic Functions - Book 1
APPENDIX B - MODBUS MASTER CONFIGURATION
B-5
Message STATUS INFO values and descriptions:
Value Description
0 Valid response message received.
* 1 Illegal MFC
* 2 Illegal Data Addr
* 3 Illegal Data Value
* 4 Failure in associated device
* 5 Acknowledge
* 6 Busy, rejected message
* 7 Nak-Negative Acknowledgment
* 8 Memory parity error
241 At least one of the attributes that was read was out of it’s data type range.
For instance a value of 300 was read and the data type is long state
which allows 0 through 255. The input value will be set to it’s minimum
value or maximum value or left unchanged per CFG item OUT OF
RANGE VALUE READ.
242 Response message invalid; it was not the expected response to the
message that was sent.
243 Response message CRC error..
244 Response message communication error; such as: parity, framing,
overrun or break.
245 No response message from slave.
246 SLAVE ADDR or STARTING REGISTER NUMBER invalid. The message
was not sent.
247 This modbus master function of the EX block has just initialized.
248 Modbus Master Configuration error in this block, therefore this block will
not execute as a MASTER.
249 Out of RAM memory, therefore this block will not execute as a MASTER.
250 There is no Modbus Master EX block configured as CFG,MM,PORTz for
this port, therefore this block will not execute as a MASTER.
* These are standard Modbus protocol exception codes.