PM867 read modbus protocol data fail,can someone hlep me?Answer this question Follow
You get a bunch of results, but the important one ( and the only hit for minus 19) is "General Status codes" ....
An attempt was made to carry out an unauthorised operation.
This is a general error - not a MODBUS specific error - so something is wrong with your setup somewhere. The MBRead and MBWrite blocks are failing to execute properly.