Delta AH500 Programming Manual page 339

Explanation:
1. The instruction is used to implement the PID algorithm. After the sampling time is reached, the
PID algorithm is implemented. PID stands for Proportional, Integral, Derivative. The PID
control is widely applied to mechanical equipments, pneumatic equipments, and electronic
equipments.
2. The setting of the parameters is as follows.
Device number
PID_RUN
SV
PV
PID_MODE
：
MV_MAX
：
MV_MIN
： Manual output value (MOUT)
MOUT
：
I_MV
： Output value (MV)
MV
Data
Function
type
Enabling the PID algorithm
BOOL
SV
REAL
PV
REAL
Double
PID control mode
word/DINT
Ch a pt er 6 Ap p l i ed I ns t r uc t i ons
Maximum output value
(MV_MAX)
Minimum output value
(MV_MIN)
Accumulated integral value
(I_MV)
Setting
range
True: The PID algorithm is
implemented.
False: The output value
Range of
single-
precision
floating-
point
numbers
Range of
single-
precision
floating-
point
numbers
0: Automatic control
When PID_MAN is
switched from ON to OFF,
the output value (MV)
then is involved in the
automatic algorithm.
1: The parameters are tuned
automatically for the
temperature control.
When the tuning of the
parameters is complete,
the device is
automatically set to 0,
and is filled in with
appropriate parameters
K
P
2: Automatic control
When PID_MAN is
Double word
Double word
Double word
Double word
Double word
Description
(MV) is reset to 0,
and the PID
algorithm is not
implemented.
Target value
Process value
, K , and K .
I D
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