Pid Processing Method - Mitsubishi Electric MELSEC-Q series Programming Manual

1.1

PID Processing Method

This section describes the processing method for PID control using PID control instructions. ( Page 25 FUNCTIONS OF
PID CONTROL)
Overview of PID Control Processing
Execute PID control with PID control instructions by loading an A/D converter module and a D/A converter module, as shown
below.
In the PID control processing method, as shown above, the PID operation is executed using the set value (SV) and the
process value (PV) read from the A/D converter module, and the manipulated value (MV) is then calculated.
The calculated MV (manipulated value) is output to the D/A converter module.
Operation when PID Operation Instruction Executed
When a PID operation instruction
is performed.
PID operation in accordance with the PID operation instruction is executed in preset sampling cycles.
*1 There are the following PID operation instructions.
S.PIDCONT (incomplete derivative)
PIDCONT (complete derivative)
*1
is executed in a sequence program, the sampling cycle is measured and a PID operation
1 GENERAL DESCRIPTION
1.1 PID Processing Method
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