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PQ-132-U
2 Characteristics
This module was developed for controlling pressure and force of hydraulic drives, worked out as a classical
p/Q controller (flow control with closed loop pressure limitation function). The command values are given by
analogue input signals and the module is controlled by digital inputs. Furthermore some feedback values and
status messages can be used there.
The output signal is available as an active differential output for direct connecting of control valves with inte-
grated electronics. Alternatively a current output can be parameterized.
The control loop uses a control cycle time of 1 ms (adjustable). The controller is equipped with two sets of pa-
rameters, which can be switched in case of critical applications with different operating points.
The following control parameters are programmable: P (proportional), I (integrating), D (differential) with D_T1
(T1 filter) and I_ACT (activating of the integrator).
Internally the system is monitored for several errors. Data, command signal and sensor errors will be dis-
played via the READY output and the corresponding LED.
The parameterization (USB interface) is supported by our WPC-300 program. Various functions support the
commissioning and troubleshooting. The operation is simple and problem-oriented, thus ensures a very short
training time.
Typical applications:
electronic 3way pressure control (down to zero bar), feed drives with definable max
force as well as drives that have to follow an outline with constant force (polishing of surfaces).
Features
Analogue q
– and p-command values
Simple and intuitive scaling of the sensor
Classical p/Q controller with pressure limitation (automatic switch over)
PID-controller with switchable parameter set
Data set for the pressure (force) in bar
Ramps for pressure up and down
Parameterset linked ramp times/detachable
Force- / pressure controller with one sensor
Differential pressure control with two pressure sensors
Fault diagnosis and extended function checking
Simplified parameterization with WPC-300 software
