ICP DAS USA tGW-700 Series User Manual page 86

Tiny Modbus/TCP to RTU/ASCII Gateway
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Defined Exception Codes for tGW-700:
Code Name and Description
GATEWAYTARGETDEVICEFAILEDTORESPOND
0x0B
Timeout. The slave device does not respond within the timeout value, the tGW-700 will return this code.
GATEWAYTARGETDATAFAILEDTORESPOND
0x4B
Timeout. The slave device is still sending data when timed out, the tGW-700 will return this code. Please use
larger Slave Timeout value for the serial port of the tGW-700 module.
MODBUS PROTOCOL FORMAT ERROR
0x41
The tGW-700 will return this code when slave response is invalid Modbus message.
WRONG DATA LENGTH
0x42
The tGW-700 will return this code when tGW-700 received wrong data length.
Please use larger Slave Timeout value for the serial port of the tGW-700 module.
0x43
CRCERROR
0x52
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