Mitsubishi MELSEC System Q User Manual

6.1.1 Additional Instructions for Process CPUs
For the efficient programming of PID controls the following instructions are available for the
Q12PHCPU and Q25PHCPU Process CPUs.
6–10 MITSUBISHI ELECTRIC
Applied Instructions Reference More Advanced Programming
Category Instruction Function
I/O control
instructions
Input
IN
Analog input processing (actual value)
Output
OUT1
Output processing
OUT2
Manual output
MOUT
Output processing in manual mode of the PID control
PWM
DUTY
Output of a pulse width modulated signal (0 to 100 %)
Compare
BC
Compare an input value with up to two set values and
output of the result as bit data.
Pulse retentive
PSUM
Integrate input value with limit detection and output the
result.
Control
operation
instructions
PID control
PID
Basic PID control
2PID
2-degree-of-freedom PID
PIDP
Position type PID
PI control
SPI
Sample PI
I-PD control
IPD
I-PD control
PI control
BPI
PI control
2-position ON/OFF
ONF2
2-position ON/OFF
3-position ON/OFF
ONF3
3-position ON/OFF
Signal
processing
Rate operation
R
Limits the change rate of the output signal
Limit alarms
PHPL
Checks an input value and issues alarms when upper or
lower limits are reached
Lead/lag
LLAG
The output of the LLAG instruction either follows the input
delayed or leads the input.
Integration
I
Performs integral operation of an input signal
Differentiation
D
Performs derivative operation of an input signal
Dead time
DED
Output of the input value with a delay of dead time.
Output of maximum
/intermediate/mini
-
mum value
HS
Outputs the maximum value from up to 16 input values.
LS
Outputs the minimum value from up to 16 input values.
MID
Outputs the intermediate value from up to 16 input
values.
Average value
AVE
Calculates the average value of up to 16 input values.
Upper/lower limiter
LIMT
Limits an input value to an area defined by an upper and
a lower limit.
Change rate
VLMT1
Limits the varying speed of the output value
VLMT2
Dead zone
DBND
An input value which is within the dead zone, is not out
-
put.
Program setting
device
PGS
Provides a control output according to a pattern
Loop selector
SEL
In automatic mode either one of two input signals is out
-
put. In manual mode the manipulated value is output.
Bump-less transfer
BUMP
Provides a bump-less transfer when switching from man
-
ual to automatic mode.
Analog memory
AMR
Increases or decreases the output value at a fixed rate.

Mitsubishi MELSEC System Q Specifications

General

Brand	Mitsubishi
Model	MELSEC System Q
Category	Controller
Language	English