Instruction Manual
OCM F
Page 64
OCM F - Rev. 04 as of 18.02.2014
®
Guideline:
Interval =
average flow velocity
• 1,3
distance between regulating unit and measurement
Slide valve run
time/shifter time
Use this parameter to monitor spindle breaks, slide valve gate breaks, gear
defects, power failures on the regulating unit or other malfunction sources
which may reveal because the regulating unit does not move although control
signals are being generated.
An error message is going to be generated if the controller unit does not reach
the end switch CLOSED after the slide run time has expired
(see Chap. 9.2 sub item “Error messages“)
Guideline:
Slide run time to be set = time between open and closed condition of slide valve
during permanent operation • 1,2 ......2,0.
(the longer the slide run time the lower the factor)
The slide run time has an effect similar to the P-factor and has to be set!
There will be no error message generated e.g. in case of a broken spindle if
the slide run time has not been set!
Min. pulse time
This parameter can be considered as quite similar to the I-component of
PID controllers. It defines a minimum regulating time of a regulating unit in or-
der to ensure that calculated very short control impulses mechanically affect
the regulating unit at all. Hence the minimum control impulse duration should
be specified longer than motor start-up time + gear cle slide valve
clearance. If 0 has been set an impulse duration of 0.25 seconds will be used.
Max. pulse time
This parameter defines the maximum control impulse duration of the regulating
unit. This allows to limit the slider run time. The maximum control impulse du-
ration should be shorter than the cycle time.
P-Factor
The proportionality factor indicates, to which degree the regulating time is go-
ing to be affected in case of a deviation
∆
w from setpoint w. The higher the
proportionality factor, the longer the regulating time of the slide valve at the
same control deviation..
Quick close function:
The quick close function is used if certain conditions such as large diameters,
long slide valve run times and long dead times of the measurement section are
given. In case of sudden rainfall events this function will partially close the
open slide valve independent of the calculated regulating time.
During permanent operation this is going to be executed without any run time
interruption. This function requires “h, Q and t-quick close” to be set.
Summary of Contents for osm-f
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