Chapter 1 Overview; Features - Mitsubishi MELSEC-Q series Programming Manual

CHAPTER 1
This manual describes the process control instructions equipped for the CPU module.
1.1

Features

The process control instructions have the following features.
(1) Use of floating-point data
Capable of handling floating-point type real number data, the instructions can perform wide-range and accurate
operations.
(2) Increased efficiency of system adjustment
Micro-blocked process control instructions are combined to perform PID control.
This enables actions to be confirmed on a process control instruction basis, ensuring efficient system adjustment.
Example) Process control instructions used to carry out 2-degree-of-freedom PID control
Process control instruction 1
(Input instruction)
Process control instruction 2
(Upper lower limit alarm instruction)
Set value (SV)
Process control instruction 3
(2-degree-of-freedom PID
control instruction)
Process control instruction 4
(Output instruction)
10
OVERVIEW
Microblock
S.IN instruction
Microblock
S.PHPL instruction
Process value (PV)
Microblock
S.2PID instruction
Microblock
S.OUT1 instruction
Use each instruction common table.
Loop tag memory setting
Operation constant setting
Execution command
T0
M0
Always executed
P1
S.IN
S.PHPL
S.2PID R40
S.OUT1
K1
T0
PLS M0
CALL P1
RST T0
FEND
FLT D0 R0
R0 R100 R200 R1000
EMOV R100 R20
R20 R120 R220 R1000
EMOV R120 R40
R140 R240 R1000 R300
EMOV R140 R60
R60 R160 R260 R1000
INT R160 D1
RET