Omron GRT1-PNT - DATASHEET 2 Operation Manual page 87

Troubleshooting using the LED indicators
4-2-4 PROFINET IO errors
BF Probable cause
Not lit No PROFINET IO Communication error
encountered. The Unit is exchanging I/O
data with the Controller Unit.
Flashing The PROFINET IO Configuration
downloaded to the IO Controller is not
correct. There is however communication
with the IO Controller Unit.
Lit The PROFINET IO Configuration is not
correct. There is no communication with the
IO Controller.
The SmartSlice I/O Bus did not properly
start.
If power supply to the Unit is correct and the Communication Unit and the
SmartSlice I/O Units are operating correctly, problems in the PROFINET IO
Connection can be determined using the BF LED indicator (Bus Fail) on the
PROFINET IO Communication Unit. The tables below lists the BF LED
options.
/i
Note When multiple SmartSlice I/O Units do not match with the PROFINET IO
Configuration, the Alarm message will only indicate the first mismatching
SmartSlice I/O Unit.
Correction
• Verify that the selected configuration matches the physical
SmartSlice I/O Unit configuration connected to the
PROFINET IO Communication Unit. Check the PROFINET
IO Alarm. (see Note)
• Check the configuration and the parameter data of the IO
Device.
• Some SmartSlice I/O Units (such as the GRT1-AD2)
support different I/O sizes. Make sure this SmartSlice I/O
Unit is configured according the PROFINET IO
configuration.
• Verify the Unit has the same Device Name as in the IO
Controller configuration.
• Verify no Device Name is used twice in the network.
• Verify the IO Controller Unit is on-line.
• Verify the SmartSlice I/O Units are properly connected and
the block terminated with the END-M or END Unit.
Section 4-2
75