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I'm trying to communicate with a Socomec Diris Ap with Jbus/Modbus comms interface. When I try to read any register with command 3, I get an exception response, with error code 3.
Hardware: Easysync USB-RS485 convertor with Linux program
Software, Custom C program
I think the problem is at the application level since I can send command 8, sub cmd 00, and it will echo data back to me, indicating that physical interface is working. If I send
05 03 07 2B 00 02 B4F3 (an example command in the manual that comes with it, my unit is set to address 5) the the response I get is
05 83 03 (+CRC). I get the same response for command 6 and 16 also.
Any ideas?
Hardware: Easysync USB-RS485 convertor with Linux program
Software, Custom C program
I think the problem is at the application level since I can send command 8, sub cmd 00, and it will echo data back to me, indicating that physical interface is working. If I send
05 03 07 2B 00 02 B4F3 (an example command in the manual that comes with it, my unit is set to address 5) the the response I get is
05 83 03 (+CRC). I get the same response for command 6 and 16 also.
Any ideas?