6.1.4 Pidprmw Instruction - Mitsubishi MELSEC-L series Programming Manual

Device Data item
Proportional
Proportional gain of PID
constant
+2
s
operation
(K )
P
Constant that expresses
the magnitude of the
integral action (I action)
Integral
effect.
constant
+3
s
Increasing the integral
(TI)
constant slows down the
manipulated value
change.
Constant that expresses
the magnitude of the
derivative action (D
action) effect.
Derivative
Increasing the derivative
constant
+4
s
constant causes
(T )
D
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
Filter coefficient process value.
+5
s
The filtering effect
decreases as the value
gets closer to 0.
Set the lower limit for the
manipulated value (MV)
calculated in PID
operation in automatic
MV lower limit
mode.
+6
s
(MVLL)
If the MV is less than the
set lower limit value
(MVLL), the value is
clipped to the MVLL.
Set the upper limit for the
manipulated value
calculated in PID
operation in automatic
MV upper limit
mode.
+7
s
(MVHL)
If the MV is greater than
the set upper limit value
(MVHL), the value is
clipped to the MVHL.
Setting range
Description
With PID limits
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
-50 to 2050
-50 to 2050
6.1 PID Control Instruction (Inexact Differential)
Setting
setting data are outside the
Without PID
side
limits
1 to 10000
User
(unit: 0.01)
1 to 32767
(unit: 100ms)
If setting value
User
> 30000
T1 = Infinite
( )
An error occurs and the PID
operation for the
corresponding loop is not
performed.
0 to 30000
User
(unit: 10ms)
0 to 100 User
-32768 to
User In the case of "With PID
32767
limits", the PID operation is
performed after values are
replaced as follows:
• If MVLL or MVHL value is
• If MVLL or MVHL value is
-32768 to
User
32767

6.1.4 PIDPRMW instruction

S_PIDPRMW
Processing when the
setting range
less than -50,
the value is
-50.
clipped to
greater than 2050, the
2050.
value is clipped to
6-13
6