Troubleshooting Using The Led Indicators - Omron GRT1-PNT - DATASHEET 2 Operation Manual

Troubleshooting using the LED indicators

4-2

Troubleshooting using the LED indicators

4-2-1 Power supply errors
The figure below shows the available LED indicators on the PROFINET IO
Communication Unit and on the SmartSlice I/O system attached to it. The
GRT1-PNT and the SmartSlice I/O Units are operating normally when all of
the LED indicators are lit green.
The LEDs on the Communication Unit (1) have the following functions:
/i
LED
RUN
ERR
BF
TS
UNIT PWR
I/O PWR
The LEDs on the SmartSlice I/O Units (2) have the following functions:
/i
LED
TS
Note Not shown in the figure above is a Turnback Unit. The Turnback Unit also pro-
vides I/O PWR, UNIT PWR and TS LED Indicators.
The LED indicators can be used to determine the following categories of
errors:
• Power errors
• Startup errors
• SmartSlice I/O Unit errors
• PROFINET IO 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.
1
RUN UNIT PWR
ERR
BF
TS I/O PWR
ON
1 REGS
2 NC
3 ADR
4 BACK
UNIT
+V
-V
I/O
+V
-V
DC24V
INPUT
Indicates the status of
the PROFINET IO Communication Unit
the PROFINET IO Communication Unit
the PROFINET IO Communication Unit
the SmartSlice I/O System
the Unit power supply
the I/O power supply
Indicates the status of
this specific SmartSlice I/O Unit
2
Section 4-2
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