I-7530A-MR Modbus RTU to CAN
Converter User’s Manual (Version 1.08, 07/2019) ------------- 89
6.3
Modbus Exception Codes
The following table lists the Modbus Exception codes that the I-7530A-MR
supports.
Table 6-6: Error code table
code
Description
Possible causes & solutions
1
Illegal function
The function code is not an allowable action
for the I-7530A-MR.
2
Illegal Data Address
The data address is not allowed for the I-
7530A-MR.
3
Illegal Data Value
The number of register or byte count is not
an allowed or no any CAN message is stored
in the
“Normal CAN Message” field for the I-
7530A-MR.
6
Slave Device Busy
The transmission buffer
overrun is
happened, users should retransmit the
message later when this module is normal.
