I'm currently trying to use the inepro PRO1-Mod.
When sending a Read Device Identification, I supposedly receive no response according to the custom library I'm using. When examining the data received on the RX line of the master a response is can be captured using an oscilloscope. This response consists of only two bytes [0xAB, 0x01], the bytes in this response look exactly like a exception response for the data I'm sending.
I expect any response from a Modbus device to be at least 4 bytes, which are [address, function, crc_high, crc_low].
Is the response I get a valid Modbus response? Or is the device sending an invalid response?
When sending a Read Device Identification, I supposedly receive no response according to the custom library I'm using. When examining the data received on the RX line of the master a response is can be captured using an oscilloscope. This response consists of only two bytes [0xAB, 0x01], the bytes in this response look exactly like a exception response for the data I'm sending.
I expect any response from a Modbus device to be at least 4 bytes, which are [address, function, crc_high, crc_low].
Is the response I get a valid Modbus response? Or is the device sending an invalid response?