485 communication cannot be connected
- The parameter confirmation function is selected for the 485 functions refers to the manual
- The default address of the instrument is 001, baud rate 9600, n without parity, 8 bits of data, 1 bit of stop
- Is the instrument wired correctly, connect 24V COM 485A 485B, battery power supply and two-wire system do not support 485 functions, confirm 24V power supply is normal
- The instrument communication is based on the MODBUS RTU protocol.
- Communication register address needs to be offset by 1 bit if using a software device such as a PLC, e.g. 0004, then use 0005