Additional Instructions For Process Cpus - Mitsubishi MELSEC System Q Manual

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