Program Example 3 - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Program example 3

This is an example of the sample program for auto tuning (step response method).
Use device
The content of the devices used for the program is as follows.
Item
*1
Target value (SV)
*1
Measured value (PV)
Parameter Sampling time (TS)
Operation setting
(ACT)
Input filter constant ()
Proportional gain (KP)
Integral time (TI)
Differential gain (KD)
Differential time (TD)
Input variation (incremental) alarm set value
Input variation (decremental) alarm set value
Output variation (incremental) alarm set value
Output upper limit set value
Output variation (decremental) alarm set value
Output lower limit set value
Alarm output
PV value threshold (hysteresis) width (SHPV)
Output value upper limit (ULV)
Output value lower limit (LLV)
Wait setting from end of tuning cycle to start of PID
control (KW)
*1
Output value (MV)
: This is an item not occupied.
*1 The setting is always necessary.
*2 When CH1 is used.
9 PID CONTROL FUNCTION
78
9.8 Examples of Program
*1
*1
Operation direction
Input variation alarm
Output variation alarm
Auto-tuning
Upper and lower limits of
output value
Select auto-tuning mode
*1
*1
*1
Input variation (incremental) is
exceeded
Input variation (decremental)
is exceeded
Output variation (incremental)
is exceeded
Output variation (decremental)
is exceeded
Device Setting value
During auto-tuning
(s1) D500 5000 (50.0)
*2
(s2) SD6022 According to input value
(s3) D510 1000 (1000ms)
(s3)+1 b0 D511.0 According to auto-tuning
result
(s3)+1 b1 D511.1 0 (Alarm is not provided)
(s3)+1 b2 D511.2 0 (Alarm is not provided)
(s3)+1 b4 D511.4 1 (AT is provided)
(s3)+1 b5 D511.5 0 (Setting is not provided)
(s3)+1 b6 D511.6 0 (Step response method)
(s3)+2 D512 0 (Input filter is not
provided)
(s3)+3 D513 According to auto-tuning
result
(s3)+4 D514 According to auto-tuning
result
(s3)+5 D515 0 (Differential gain is not
provided)
(s3)+6 D516 According to auto-tuning
result
(s3)+20 D530 Not used
(s3)+21 D531 Not used
(s3)+22 D532 Not used
(s3)+23 D533 Not used
(s3)+24 b0 D534.0 Not used
(s3)+24 b1 D534.1 Not used
(s3)+24 b2 D534.2 Not used
(s3)+24 b3 D534.3 Not used

(s3)+25 D535

(s3)+26 D536

(s3)+27 D537
(s3)+28 D538 
(d) D502 1800 (1.8 second)
During PID control
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used