Mitsubishi MELSEC-L series Programming Manual page 309

(1) PID control data
Device Data item
Common setting data (device: +0 to
s
Number of loops
+0
s
Number of loops
+1
s
in one scan
Setting data for No. 1 loop (device:
Operational
expression
+2
s
selection
Sampling cycle
+3
s
(T )
S
Proportional
constant
+4
s
(K )
P
Integral
constant
+5
s
(TI)
Derivative
constant
+6
s
(T )
D
Filter coefficient
+7
s
( )
*1 : For the PID operational expressions set for Operational expression selection, refer to the MELSEC-Q/L/QnA
Programming Manual (PID Control Instructions).
Description
With PID limits
+1)
s
Set the number of loops
for PID operation.
Set the number of loops
for PID operation in one
scan if multiple loops
have reached the
sampling cycle time.
+2 to +11)
s s
0: Forward
Select the PID
operation
operational expression.
1: Reverse
*1
operation
1 to 6000
Set the PID operation
(unit: 10ms)
cycle.
Proportional gain of PID 1 to 10000
operation (unit: 0.01)
1 to 32767
Constant that expresses
(unit: 100ms)
the magnitude of the
integral action (I action)
effect. If setting value
> 30000
Increasing the integral
constant slows down the
T1 = Infinite
manipulated value
change.
Constant that expresses
the magnitude of the
derivative action (D
action) effect.
Increasing the derivative 0 to 30000
(unit: 10ms)
constant causes a
significant changes in the
manipulated value even
with a slight change of
the control target.
Set the degree of filtering
to be applied to the
process value.
0 to 100
The filtering effect
decreases as the value
gets closer to 0.
Setting range
Without PID
limits
1 to 32
1 to 32
0: Forward
operation
1: Reverse
operation
1 to 6000
(unit: 10ms)
1 to 10000
(unit: 0.01)
1 to 32767
(unit: 100ms)
If setting value
> 30000
T1 = Infinite
( ) ( )
0 to 30000
(unit: 10ms)
0 to 100
6.2 PID Control Instruction (Exact Differential)
6.2.1 PIDINIT instruction
PIDINIT
Processing when the
Setting
setting data are outside the
side
setting range
User
An error occurs and the PID
operation for all loops is not
User performed.
User
User
User
User
An error occurs and the PID
operation for the
corresponding loop is not
performed.
User
User
6
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