Characteristics - WEST PQP-171-P Technical Documentation Manual

2 Characteristics

This module is used as universal closed loop control module, e.g. for displacement swivel angel control. It has
an integrated power amplifier for proportional valves. Several setting parameters offer optimal adaption to the
valve. The controller runs with a loop time of 1 ms and the amplifier with 0,125 ms for the current control.
The command value and the feedback value are driven by scalable analogue signals (range 0... 10V or 4...
20mA). Ramp function and PID controller can be used universal. The output current is closed loop controlled
and therefore independent from the supply voltage and a varying solenoid resistance. The output stage is ca-
ble broken monitored and switches off in case of detected error.
Programmable are the following control parameters: SC, P, I, D, T1 and LIM for the integrator limitation as well
as different static settings and valve adjustments for the power stage like MIN, MAX, DITHER (in frequency
and amplitude) and the PWM frequency.
By the free parameterization of the power stage all typical proportional valves of the different manufactures
can be optimal adapted.
Because of the easy handling a very short training period is guaranteed.
Typical applications: General pressure control with pressure valves (direct or via a servo pump).
Features

Universal pump control module for proportional directional valves

Compact housing

Digital reproducible adjustments

Free scaling of the analogue input signals

Universal PID controller

Free parameterization of ramps, MIN and MAX, DITHER (frequency and amplitude) and
PWM frequency

Output current up to 2,6 A

Adaptable to all standard proportional valves

Application orientated parameter settings

Fault diagnosis and extended function checking

Simplified parameterization with WPC-300 software
Page 7 of 34 PQP-171-P 05.06.2020