I-7530A RS-232/485/422 to CAN Converter User’s Manual (Version 1.2, Sep/2011) ------------- 39
5. Troubleshooting
If the Error response function on the I-7530A module is set to be
“Yes”(that means enable) via the I-7530A Utility during the configuration
period, the I-7530A will send the error code to the RS-232/485/422 device
or the host PC through the RS-232/485/422 media when the I-7530A
produces an error message automatically during the operation mode. The
meanings of these error codes are given below:
Table 12: Error code table
Error
code
Description
Possible causes & solutions
1 Invalid
header
The RS-232/485/422 command string header is not
“t”,”T”,”e”,”E”,”S”,”C”,”P0”, ”P1” nor “RA”.
2 Invalid
length
The data byte of the CAN Message does not match
the data length of the CAN Message. For example:
Error: t001512345<CR>
Right: t00150102030405<CR>
3 Invalid
checksum
The checksum from the RS-232/485/422 command
string does not matched with the checksum
calculated by the I-7530A. For example:
Error: t0012112209<CR>
Right: t00121122FD<CR>
5 Timeout
The ASCII command strings are sent incomplete.
For example:
Error: T0018
Right: T0018<CR>
If the I-7530A CAN baud rate is not the same as the CAN baud rate
on the CAN network, the ON LED on the I-7530A will flash with a constant
frequency because the I-7530A cannot send any CAN messages to the
CAN network. Therefore, users will need to read the I-7530A status by
using the command “S[CHK]<CR>”(in the section 4.5) to help users
understand what is going in the module. In general, the following errors
could occur: CAN media connection problem, terminal resistor problem,
different baud rate configuration with CAN network and the like.
