Mitsubishi Electric MELSEC iQ-F FX5 - Page 622

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35 CPU MODULE BUILT-IN ANALOG FUNCTION
35.5 Function (PID Control Via Instruction)
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.
Item Device Setting value
During auto-tuning During PID control
Target value (SV)
*1
(s1) D500 500 (50.0) Not used
Measured value (PV)
*1
(s2) SD6300
*2
According to input value Not used
Parameter Sampling time (TS)
*1
(s3) D510 500 (500 ms) Not used
Operation setting
(ACT)
Operation direction
*1
(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
(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
Overshoot suppression
setting
(s3)+1 b7 D511.7 Not used Not used
Hunting suppression
setting
(s3)+1 b8 D511.8 Not used Not used
Input filter constant () (s3)+2 D512 0 (Input filter is not provided) Not used
Proportional gain (KP)
*1
(s3)+3 D513 According to auto-tuning
result
Not used
Integral time (TI)
*1
(s3)+4 D514 According to auto-tuning
result
Not used
Differential gain (KD) (s3)+5 D515 0 (Differential gain is not
provided)
Not used
Differential time (TD)
*1
(s3)+6 D516 According to auto-tuning
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
(s3)+22 D532 Not used Not used
Output variation (decremental) alarm set value
Output lower limit set value
(s3)+23 D533 Not used Not used
Alarm output Input variation
(incremental) is exceeded
(s3)+24 b0 D534.0 Not used Not used
Input variation
(decremental) is exceeded
(s3)+24 b1 D534.1 Not used Not used
Output variation
(incremental) is exceeded
(s3)+24 b2 D534.2 Not used Not used
Output variation
(decremental) is exceeded
(s3)+24 b3 D534.3 Not used Not used
PV value threshold (hysteresis) width (SHPV) (s3)+25 D535 50 (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)
(s3)+28 D538 -50 (Wait is not provided) Not used
Output value (MV)
*1
(d) D502 According to operation Not used