KEYENCE GL-RHG Series User Manual
Page 129
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.
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