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User Manual
GFK-1503F
Words
12 (Address +
11)
PID Built-in Function Block
Parameter/Description
Minimum Slew Time
Minimum number of seconds for the CV output
to move from 0 to full travel of 100% or 32000
CV Counts. It is an inverse rate limit on how fast
the CV output can change.
If positive, CV cannot change more than 32000
CV Counts times the solution time interval
(seconds) divided by Minimum Slew Time.
For example, if the Sample Period is 2.5 seconds
and the Minimum Slew Time is 500 seconds, CV
cannot change more than 32000 * 2.5 / 500 or
160 CV Counts per PID solution.
The integral term value is adjusted if the CV rate
limit is exceeded.
When Minimum Slew Time is 0, there is no CV
rate limit. Set Minimum Slew Time to 0 while
tuning or adjusting PID loop gains.
Chapter 14
Jan 2020
Low Bit
Range
Units
Seconds /
0 (none) to
Full Travel
32000 sec to
move full CV
travel
255
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