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PQP-171-P
5.4.2
Integrator control function
Command
Parameter
Unit
Group
C:I_LIM
X
x= 0… 10000
0.01 %
CL
C:I_LIM means limitation of the integrator range (faster control function by reduced pressure overshoots). By a
high nonlinearity of the valve the LIM value must be sufficient to compensate it.
5.4.3
C_EXT (Extended control parameters)
Command
Parameter
Unit
Group
C_EXT:I
X
I= P|T1|FF
:P x= 0… 10000
:T1 x= 0… 1000
:FF x= 0… 10000
0.01
0.1 ms
0.01 %
CL+EXP
These commands are used to parameterize an additional PT1 control part parallel to the P-gain.
The time-damped P-gain can be driven with a higher gain than the direct P-gain. The stability is enhanced by
the T1 value.
Via the FF parameter this part of the command value is given directly to the output. So the controller has to
compensate only the deviation. The outcome of this is a stable control performance and a dynamic driving at
the same time. This parameter is active only if valves with one solenoid are used (-> SIGNAL:U).
