ICP DAS USA I-7530 User Manual page 35

3 Invalid checksum
5 Timeout
If the I-7530 CAN baud rate is not the same as the CAN baud rate on
the CAN network, the data flow LED on the I-7530 will be flash with a
constant frequency because the I-7530 cannot send any CAN messages
to the CAN network. Therefore, users will need to read the I-7530 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.
I-7530 RS-232/CAN Converter User's Manual (Version 2.0, Sep/2007) ------------- 35
The checksum from the RS-232 command string
does not matched with the checksum calculated by
the I-7530. For example:
Error: t0012112209<CR>
Right: t00121122FD<CR>
The ASCII command strings are sent incomplete.
For example:
Error: T0018
Right: T0018<CR>