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S_PIDINIT
Device
Data item
(Fixed value)
+12
S
Derivative gain
+13
S
(K
)
D
(Fixed value)
+14
S
(Fixed value)
+15
S
Setting data for No. 2 loop (device:
Operational
expression
+16
S
selection
Sampling cycle
+17
S
(TS)
Proportional
constant
+18
S
(KP)
Integral
constant
+19
S
(TI)
Derivative
constant
+20
S
(T
)
D
Filter coefficient
+21
S
(
)
MV lower limit
+22
S
(MVLL)
MV upper limit
+23
S
(MVHL)
MV change rate
limit
+24
S
(
MVL)
PV change rate
limit
+25
S
(
PVL)
(Fixed value)
+26
S
Derivative gain
+27
S
(K
)
D
(Fixed value)
+28
S
(Fixed value)
+29
S
5.5 PID Control Instruction (Inexact Differential)
5-162
5.5.1 PIDINIT instruction
Description
With PID limits
–
Set a duration (delay in
0 to 32767
action) for derivative
(unit: 0.01)
action.
As the setting value
If setting value
increases, the duration
> 30000
becomes smaller and
action becomes closer to
K
D
exact differential.
Ideal value K
= 8.00
D
–
–
+16 to
+29)
○
○
S
S
Setting data for No. 1 loop
Setting range
Without PID
limits
0
0
0 to 32767
(unit: 0.01)
If setting value
> 30000
= Infinite
K
= Infinite
D
(
)
(
)
0
0
0
0
Processing when the
Setting
setting data are outside the
side
setting range
User
–
An error occurs and the PID
operation for the
User
corresponding loop is not
performed.
User
–
User
–
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