Characteristics - WEST PAM-198-P Technical Documentation Manual

2 Characteristics

This module is used for the control of the spool position of directional valves with electrical feedback. Various
adjustable parameters allow for an optimized adaptation to the respective valve. The integrated power ampli-
fier with a short cycle time of 0,125 ms for the current loop is an inexpensive and space-saving solution. The
closed loop of the application works with a sample time of 1 ms.
Command value and feedback value are read in via free scalable analog inputs (voltage signals in the range
of 0... 10V or +/-10V respectively current signals in the range of 4... 20mA). The output current is closed loop
controlled and therefore independent from the power supply and the solenoid resistance. The output stage is
monitored for cable breakdown, is short circuit proof and disables the power stage in case of an error.
RAMP, MIN and MAX, the DITHER (frequency and amplitude) and the PWM frequency are programmable.
In addition, the valve characteristics can be linearized via 10 XY-points.
Features

Control of directional valves with spool position feedback

Compact housing

Digital reproducible adjustments

Free scaling of the analogue inputs

PID controller with feed forward function

Controlling valves with one or two solenoids

Bipolar controlling via differential input

Characteristics linearization via 10 XY-points per direction

Free parameterization of RAMPS, MIN und MAX, output current, DITHER (frequency, amplitude)

Nominal output current range up to 2.6 A

Simple and application orientated parameter settings via WPC-software

Failure monitoring and extended function check
Page 7 of 33 PAM-198-P 05.06.2020