Mitsubishi Electronics FX5 ユーザーズマニュアル

9 PID CONTROL FUNCTION
9.8 Examples of Program

Program example 4

This is an example of the sample program for auto tuning (limit cycle method) + PID control.

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)

(s1)

D500

5000 (50.0)

Measured value (PV)

(s2)

SD6022

According to input value

Parameter

Sampling time (TS)

(s3)

D510

500 (500 ms)

Operation setting
(ACT)

Operation direction

(s3)+1 b0

D511.0

1 (Backward operation)

Input variation alarm

(s3)+1 b1

D511.1

0 (Alarm is not provided)

Output variation alarm

(s3)+1 b2

D511.2

0 (Alarm is not provided)

Auto-tuning

(s3)+1 b4

D511.4

1 (AT is provided)

Upper and lower limits of
output value

(s3)+1 b5

D511.5

0 (Setting is not provided)

1 (Setting is provided)

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)

0 (Input filter is not provided)

Proportional gain (KP)

(s3)+3

D513

According to auto-tuning
result

Integral time (TI)

(s3)+4

D514

According to auto-tuning
result

Differential gain (KD)

(s3)+5

D515

0 (Differential gain is not
provided)

Differential time (TD)

(s3)+6

D516

According to auto-tuning
result

Input variation (incremental) alarm set value

(s3)+20

D530

Not used

Input variation (decremental) alarm set value

(s3)+21

D531

Not used

Output variation (incremental) alarm set value
Output upper limit set value

(s3)+22

D532

Not used

2000 (2 second)

Output variation (decremental) alarm set value
Output lower limit set value

(s3)+23

D533

Not used

0 (0 second)

Alarm output

Input variation (incremental) is
exceeded

(s3)+24 b0

D534.0

Not used

Input variation (decremental)
is exceeded

(s3)+24 b1

D534.1

Not used

Output variation (incremental)
is exceeded

(s3)+24 b2

D534.2

Not used

Output variation (decremental)
is exceeded

(s3)+24 b3

D534.3

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)

(s3)+28

D538

-50 (Wait is not provided)

Not used

Output value (MV)

(d)

D502

According to operation