Chapter 15 The PID function
15.1 Introductions............................................................................. 15-1
15.2 PID control ................................................................................. 15-2
15.2.1 Control actions ..................................................................................................15-2
15.2.2 Realization of PID control on th e PLC........................................................15-13
15.3 Function blocks ...................................................................... 15-15
15.3.1 The function block for PID operation (PID6CAL) ......................................15-16
15.3.2 The error code of PID6CAL F/B...................................................................15-18
15.3.3 Auto tuning function block (PID6AT) ...........................................................15-19
15.3.4 Error codes of auto-tuning function block (PID6AT) .................................15-21
15.4 Programming........................................................................... 15-22
15.4.1 System configurat ion .....................................................................................15-22
15.4.2 Initial setting .................................................................................................... 15-22
15.4.3 Program description.......................................................................................15-23