Mitsubishi Electric MELSEC iQ-R Series, Programming Manual

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APPX
Appendix 5 PID Control Program Examples
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Appendix 5
PID Control Program Examples
This section provides examples of PID control programs where PID control instructions are used.
The following system configuration is used.
I/O number of the R60AD4: X/Y80 to X/Y8F, I/O number of the R60DA4: X/YA0 to X/YAF
Program examples for PID control in automatic mode
The program performs PID operation using the digital value input from the R60AD4 as a process value (PV), and outputs the
obtained manipulated value (MV) from the R60DA4.
The program conditions are as follows:
Item Inexact differential Exact differential
Number of loops that performs PID operation 2
Sampling period 1 second
Device where PID control data are set Common data D500, D501
Loop 1 data D502 to D515 D502 to D511
Loop 2 data D516 to D529 D512 to D521
Device where I/O data are set Common data D600 to D609
Loop 1 data D610 to D632 D610 to D627
Loop 2 data D633 to D655 D628 to D645
Set value (SV) Loop 1 600
Loop 2 1000
Device used to start/stop PID control PID control start command X0
PID control stop command X1
Digital value of the R60AD4 and R60DA4 0 to 2000
R60AD4
MV
PV
PV
MV
R60DA4
CH.1 CH.1
CH.2 CH.2
CPU module
PID operation
PID operation
Loop 1
Loop 2
External device
External device