Справочник Пользователя для Mitsubishi Electronics FX5

9  PID CONTROL FUNCTION

9.6  Details of Parameters

When the upper and lower limit settings of the output value are valid, the output value is as shown in the chart. The upper limit 
and lower limit of the output value can moderate the increase of the integral item in the PID control.
When using the upper limit and lower limit of the output value, make sure to set (s3)+1, b2 to OFF.

The input filter (

) is a software filter to reduce the fluctuation of the measured value (PV) caused by noise. By setting this time 

constant of the filter according to the control target characteristics and noise level, the effect of noise can be reduced. If the 
input filter value is too small, the filter effect is small. If the input filter value is too large, the input response is bad. Setting 
range: 0 to 99 (%).
Because the input filter (

) acts on the target value (SV), all of the proportional operation, integral operation and differential 

operation are affected.

Operation setting

(s3)+1: b2

Output variation alarm

Make sure to set it to OFF

(s3)+1: b5

Output value upper/lower limit setting

ON: Used
OFF: Not used

Output value upper limit

Output value lower limit

Time

(s3)+22

Output value (MV)

(s3)+23

These values are not output

These values are not output

When the upper limit and 
lower limit of output value are set

When the upper limit and 

lower limit of output value are not set

Measured value (PV) processed 
by input filter

Input amplitude

Pulse input by noise

Actual measured value (PV)

Time

Time

Time

Time

Input amplitude processed 
by input filter