Mitsubishi Electronics FX5 ユーザーズマニュアル
76
9 PID CONTROL FUNCTION
9.8 Examples of Program
9.8 Examples of Program
Program example 2
This is an example of the sample program for auto tuning (limit cycle method).
Use device
The content of the devices used for the program is as follows.
: This is an item not occupied.
*1 The setting is always necessary.
*2 When CH1 is used.
*2 When CH1 is used.
Item
Device
Setting value
During auto-tuning
During PID control
Target value (SV)
(s1)
D500
5000 (50.0)
Not used
Measured value (PV)
(s2)
SD6022
According to input value
Not used
Parameter
Sampling time (TS)
(s3)
D510
500 (500 ms)
Not used
Operation setting
(ACT)
(ACT)
Operation direction
(s3)+1 b0
D511.0
1 (Backward operation)
Not used
Input variation alarm
(s3)+1 b1
D511.1
0 (Alarm is not provided)
Not used
Output variation alarm
(s3)+1 b2
D511.2
0 (Alarm is not provided)
Not used
Auto-tuning
(s3)+1 b4
D511.4
1 (AT is provided)
Not used
Upper and lower limits of
output value
output value
(s3)+1 b5
D511.5
0 (Setting is not provided)
Not used
Select auto-tuning mode
(s3)+1 b6
D511.6
1 (Limit cycle method)
Not used
Input filter constant (
)
(s3)+2
D512
0 (Input filter is not
provided)
provided)
Not used
Proportional gain (KP)
(s3)+3
D513
According to auto-tuning
result
result
Not used
Integral time (TI)
(s3)+4
D514
According to auto-tuning
result
result
Not used
Differential gain (KD)
(s3)+5
D515
0 (Differential gain is not
provided)
provided)
Not used
Differential time (TD)
(s3)+6
D516
According to auto-tuning
result
result
Not used
Input variation (incremental) alarm set value
(s3)+20
D530
Not used
Not used
Input variation (decremental) alarm set value
(s3)+21
D531
Not used
Not used
Output variation (incremental) alarm set value
Output upper limit set value
Output upper limit set value
(s3)+22
D532
Not used
Not used
Output variation (decremental) alarm set value
Output lower limit set value
Output lower limit set value
(s3)+23
D533
Not used
Not used
Alarm output
Input variation (incremental) is
exceeded
exceeded
(s3)+24 b0
D534.0
Not used
Not used
Input variation (decremental)
is exceeded
is exceeded
(s3)+24 b1
D534.1
Not used
Not used
Output variation (incremental)
is exceeded
is exceeded
(s3)+24 b2
D534.2
Not used
Not used
Output variation (decremental)
is exceeded
is exceeded
(s3)+24 b3
D534.3
Not used
Not used
PV value threshold (hysteresis) width (SHPV)
(s3)+25
D535
500 (5.0)
Not used
Output value upper limit (ULV)
(s3)+26
D536
2000 (2 second)
Not used
Output value lower limit (LLV)
(s3)+27
D537
0 (0 second)
Not used
Wait setting from end of tuning cycle to start of PID
control (KW)
control (KW)
(s3)+28
D538
-50 (Wait is not provided)
Not used
Output value (MV)
(d)
D502
According to operation
Not used