Omron GRT1 - 27-11-2006, Руководство по эксплуатации

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Troubleshooting using the LED Indicators
Section 4-2
4-2-1 Power Supply Errors
Errors in the Power supply of the Unit or the external I/O are indicated by the
UNIT PWR and I/O PWR LED Indicators.
Troubleshooting UNIT
Power The UNIT PWR LED Indicator shows whether or not sufficient power is sup-
plied to the PROFIBUS Communication Unit and the SmartSlice I/O Units in
order for them to startup and operate properly. A UNIT PWR LED Indicator is
provided on the following Units:
• GRT1-PRT PROFIBUS Communication Unit
• GRT1-TBL Left Turnback Unit
The table below shows the LED Indicator options.
Unit Power Error
Note The PROFIBUS Communication Unit can startup on less power than speci-
fied. 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.
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-PRT PROFIBUS Communication Unit
• GRT1-TBL Left Turnback Unit
• GRT1-PD2 I/O Power Supply Unit
The table below shows the LED Indicator options.
I/O Power Error
UNIT
PWR Probable cause Correction
Not lit 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.
Lit No Unit power error. The correct power is supplied to the System.
I/O PWR Probable cause Correction
Not lit 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
Connector on the GRT1-PRT, 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).
Lit No I/O power error. The correct power is supplied to the External I/O System.