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KEYENCE GL-RHG Series User Manual

Page 129

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1

Troubleshooting

A-5

GL-RHG-M-NOA-E

App

end
ix

*1 All indicators on the transmitter may turn OFF.





OSSD1 error
OSSD2 error

When the error is cleared by restarting the GL-RHG.

OSSD is affected by external noise.

Check for a noise source (inverter, servomotor,
etc.) around the GL-RHG installation location and
cables.

There is a voltage surge affecting the
OSSD due to an inductive load.

When the load is inductive such as relay, use a
load with a surge absorption device.

The power supply voltage has fallen
continuously or experienced a sudden
drop.

Take measures by replacing the power supply,
increasing the power capacity, or dedicating the
power supply to the GL-RHG.

When the error is not cleared by restarting the GL-RHG.
OSSD is short-circuited to 0 V or 24 V
of power supply.
OSSDs are short-circuited to each
other.
OSSD is short-circuited to other wires.

Rewire the OSSD correctly.

"Examples of Wiring" (page 4-7)

Too much current is flowing through
the OSSD.

Check that the load does not consume more
current than the OSSD can handle.

"Specifications" (page 7-3)

OSSD is broken.

Replace the receiver.



Sub unit error

The sub unit is broken.

Replace the sub unit.

When the error is cleared by restarting the GL-RHG.

The sub unit or series connection
cable is affected by external noise.

Check for a noise source (inverter, servomotor,
etc.) around the GL-RHG installation location and
cables.



Communication
error

*1

When the error is cleared by restarting the GL-RHG.
The synchronization wire is not wired
correctly or is disconnected.

Check the connection of the synchronization wire.

The synchronization lines in the cable
are affected by external noise.

Check for a noise source (inverter, servomotor,
etc.) around the GL-RHG installation location and
cables.

The power supply voltage has fallen
continuously or experienced a sudden
drop.

Take measures by replacing the power supply,
increasing the power capacity, or dedicating the
power supply to the GL-RHG.

When the error is not cleared by restarting the GL-RHG.
The synchronization wire or series
connection cable is not connected
correctly or is disconnected.

Check the connection of the synchronization wire.

The connection with the GL-RHG in
series is broken.

Replace the GL-RHG unit connected in series.

"Series connection" (page 2-3)



:



System error

The power supply voltage has fallen
continuously or experienced a sudden
drop.

Take measures by replacing the power supply,
increasing the power capacity, or dedicating the
power supply to the GL-RHG.

The GL-RHG is broken.

Replace the GL-RHG.

Indication

Error name

Cause

Check and corrective action