W.E.ST. PQ-132-U, Техническая документация инструкция

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Page 32 of 34 PQ-132-U 05.06.2020
6.3 Troubleshooting
It is assumed that the device is in an operable state and there is communication between the module and the
WPC-300. Furthermore, the valve control parameterization has been set with the assistance of the valve data
sheets.
The RC in monitor mode can be used to analyze faults.
CAUTION: All safety aspects must be thoroughly checked when working with the RC (Remote
Control) mode. In this mode the module is controlled directly and the machine control cannot
influence the module.
FAULT CAUSE / SOLUTION
ENABLE is active, the
module does not
respond and the
READY LED is off. There is presumably no power supply or the ENABLE signal (PIN 8) is not present.
If there is no power supply, there is also no communication via our operating
program. If a connection has been made to the WPC-300, then a power supply is
also available.
ENABLE is active, the
READY LED is flashing. The flashing READY LED signals that a fault has been detected by the module. The
fault could be:

A broken cable or no signal at the inputs, if
4…20 mA signals are
parameterized.

Internal data error: press the command/SAVE button to delete the data error.
The system reloads the DEFAULT data.
With the WPC-300 operating program the fault can be localized directly via the
monitor.
ENABLE is active; the
READY LED is active; no
output signal to the valve To locate errors in the pressure-control-circuit, it is useful to start with the open loop
pressure control (PIN 7 is not activated). In this case the flow can be adjusted

No pressure command input is available or the parameterization is incorrect.
With the WPC-tool you can check if a command input is available. If not, you
should check the wiring and/or the command set-point (in the PLC for example).

If the command input is correct, you have to check the output parameter.
Check the correct setting of the output type.

Wrong configured pressure sensor. If the input-scaling is set to voltage (V) and
the pressure sensor supplies a current signal (4... 20mA), the measured pres-
sure value is always high. The output signal to the valve is therefore low.
ENABLE is active, the
READY LED is active and
the pressure is instable. In many cases you may have a hydraulic problem.
Electrical problems could be:

Electrical noise at the wire of the power supply.

Very long sensor cables (> 40 m) and sensor signal interference.

Incorrect parameterization of the pressure regulator.