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PID control
1
PLC FUNCTION
1.12 PID control
With PLC function, PID set point/PID deviation value, PID process value can be set by
setting Pr. 128.
Performing the PID operation using the value of D9248 and D9249 as PID set point/
PID deviation value, PID process value, manipulated variable is stored to D9250.
When performing PID control with PLC function, "1" is set on D9255 instead of X14
signal.
Parameter Name
Initial
Value
Setting
Range
Description
128
PID action
selection
10
10 PID reverse action Deviation value
signal input
(terminal 1)
11 PID forward action
20 PID reverse action Measured value
(terminal 4)
Set point (terminal
2 or Pr. 133)
21 PID forward action
50 PID reverse action Deviation value
signal input
(L
ON
W
ORKS
,
CC-Link
communication)
51 PID forward action
60 PID reverse action Measured value,
set point input
(L
ON
W
ORKS
,
CC-Link
communication)
61 PID forward action
70 PID reverse action Deviation value
signal input
(PLC function)
71 PID forward action
80 PID reverse action Measured value,
Set point
(PLC function)
81 PID forward action
90 PID reverse action Deviation value
signal input
(
PLC function
)
91 PID forward action
100 PID reverse action Measured value,
Set point input
(
PLC function
)
101 PID forward action
D9248
D9249
PID set point /
PID deviation
PID manipulated variable D9250
or
Inverter frequency setting
PID measurement
value
PID control