Omron GRT1-ECT SmartSlice, Operation Manual

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6 GRT1-ECT Troubleshooting
GRT1-series EtherCAT Communication Unit - Operation Manual
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Precautions for Correct Use
The EtherCAT Communication Unit can startup on less power than specified. If this happens, the
UNIT PWR LED Indicator may be OFF, whereas other LED Indicators may indicate correct
operation. In this situation however, correct operation of the whole SmartSlice I/O System is not
guaranteed.
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Troubleshooting I/O Power
The I/O PWR LED Indicator shows whether or not sufficient power is supplied to the External I/O
Power lines to the SmartSlice I/O Units in order for them to drive the external Outputs on the
individual Units.I/O slices. A I/O PWR LED Indicator is provided on the following Units:
• GRT1-ECT EtherCAT Communication Unit
• GRT1-TBL Left Turnback Unit
• GRT1-PD2 I/O Power Supply Unit
The table below shows the LED Indicator options.
Unit Power Error
[UNIT PWR]
indicator
Cause Actions
Off No Power or not enough power is
being supplied to the Units (See
note) Check whether power is supplied to the Unit Power
Connector.
Check that the supplied power is with in the required
range, i.e. 24 Vdc +10% -15% (20.4 to 26.4 Vdc).
Flashing The Unit power supply capacity is
insufficient. Check the entire SmartSlice I/O System’s power supply
requirement and replace the power supply with one
that has sufficient capacity.
On No Unit power error. The correct power is supplied to the System.
I/O Power Error
[I/O PWR]
indicator
Cause Actions
Off No Power or not enough power is
being supplied to the External I/O of
the SmartSlice I/O Units Check whether power is supplied to the I/O Power Con-
nector on the GRT1-ECT, the GRT1-TBL or the
GRT1-PD2 Unit.
Check that the supplied power is with in the required
range, i.e. 24 Vdc +10% -15% (20.4 to 26.4 Vdc).
On No I/O power error. The correct power is supplied to the External I/O System.