Table of Contents
Advertisement
Device
Data item
Set the variation limit
between the previous
MV and the present MV.
When the MV variation is
greater than the limit
MV change rate
value, bit 1 (b1) of the
limit
alarm device is set to '1'.
+8
S
(
MVL)
MV variation is not
limited. (Even if the MV
variation exceeds the
limit value, the actual MV
variation is used as it is
for calculating the MV.)
Set the variation limit
between the previous PV
and the present PV.
When the PV variation is
greater than the limit
value, bit 1 (b1) of the
PV change rate
alarm device is set to '1'.
limit
+9
S
PV variation is not
(
PVL)
limited. (Even if the PV
variation exceeds the
limit value, the actual PV
variation is used as it is
for performing the PID
operation.)
(Fixed value)
+10
S
Set a duration (delay in
action) for derivative
action.
As the setting value
Derivative gain
increases, the duration
+11
S
(K
)
D
becomes smaller and
action becomes closer to
exact
Ideal value K
(Fixed value)
+12
S
(Fixed value)
+13
S
Setting range
Description
With PID limits
0 to 2000
0 to 2000
0
–
0 to 32767
(unit: 0.01)
If setting value >
30000
K
= Infinite
D
differential
.
(
)
= 8.00
D
0
–
0
–
5.5 PID Control Instruction (Inexact Differential)
Setting
setting data are outside the
Without PID
side
limits
In the case of "With PID
limits", the PID operation is
performed after values are
replaced as follows:
-32768 to
• If the
User
32767
• If the
In the case of "With PID
limits", the PID operation is
performed after values are
replaced as follows:
-32768 to
• If the
User
32767
• If the
0
User
0 to 32767
(unit: 0.01)
An error occurs and the PID
If setting value >
operation for the
User
30000
corresponding loop is not
performed.
K
= Infinite
D
(
)
0
User
0
User
5.5.4 PIDPRMW instruction
S_PIDPRMW
Processing when the
setting range
MVL value is
less than 0,
the value is
0.
clipped to
MVL value is
greater than 2000,
the
2000.
value is clipped to
PVL value is
less than 0,
the value is
clipped to
0.
PVL value is
greater than 2000,
the
2000.
value is clipped to
–
–
–
5-171
5
Advertisement
Table of Contents
