User`s manual

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MELSEC-Q
1 OVERVIEW
1 OVERVIEW
This manual describes the process control instructions equipped for the QnPHCPU.
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 3
(2-degree-of-freedom PID
control instruction)
Use name instruction common table.
T0
M0PLS
R0D0
FLT
R1000R200R100R0S.IN
R20R100EMOV
R1000R220R120R20
S.PHPL
R40R120EMOV
R300R1000R240R140S.2PID R40
R60R140EMOV
P1
K1
Execution command
P1CALL
T0RST
FEND
T0
M0
Normal execution
R1000R260R160R60S.OUT1
D1R160
INT
Operation constant setting
RET
Microblock
S.IN instruction
Microblock
S.PHPL instruction
Microblock
S.2PID instruction
Microblock
S.OUT1 instruction
Process control instruction 2
(Upper/lower limit alarm instruction)
Process control instruction 1
(Input instruction)
Set value (SV)
Process value (PV)
Loop tag memory setting
Process control instruction 4
(Output instruction)
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