Setting Velocity Limiter To Control Output - YOKOGAWA UT Advanced UT32A User Manual

10.5 Setting Velocity Limiter to Control Output
Description
Setting Details
10-8
Output velocity limiter prevents the control output signal from changing suddenly in order
to protect the control valves (or other actuators) and controlled process.
The output velocity limiter does not work in MAN or STOP mode or when input burnout
or A/D error occurs.
Note that setting an output velocity limit may cancel the effects of derivative action.
The following shows the operation example of output velocity limiter.
(%)
100
Actual output
change
0
In Heating/cooling control, the output velocity limiter can be set to the control computation
result before split into heating-and cooling-side outputs.
In ON/OFF control or Two-position two-level control, the setting is invalid even if the
output velocity limiter is set.
Parameter
Name
symbol
OPR Output velocity limiter
100%
Velocity limit = 2.0 (%/sec)
50 sec
Time (sec)
Display
Setting range
level
OFF: Disable
STD
0.1 to 100.0%/s
Menu symbol
TUNE
IM 05P01D31-01EN