Hello, I'm student from Malaysian and currently doing a final year project about PID controller design for servo motor by using PLC. If you dont mind, I'm just wanna asking and need your advice about why my PID block always error and it describe that it 'not mapped' in my program??? I'm very sure that the destination of my PID block (input data word, 1st parameter word & output data word) are set rightly based on my PLC. For your info, I'm using PLC OMRON SYSMAC CPM2A and CX-Programmer...Here I attach my programme..tq