Indicators And Error Processing - Omron DEVICENET SAFETY - 03-2008 Operation Manual

Indicators and Error Processing

7-1

Indicators and Error Processing

MS NS
Green Red Green Red
− −
− − − −
− − − −
− − − −
80
LOCK I/O I/O
PWR
Yellow Green Yellow Red
− − −
− − − −
− − −
− − −
− − − −
− − − −
− − − −
− − − −
− − − −
Input
−
Output
−
−
−
: Lit : Flashing
Description
Safety I/O communications in
progress (normal status)
RUN status
(DST1-XD0808SL-1 only)
Standard I/O communications or
message communications in
progress (normal status)
The DST1 performing initializa-
tion process or waiting for config-
uration.
Waiting for safety or standard
connection
Communications timeout
BusOff status (communications
stopped due to consecutive data
errors)
Node address duplication
Waiting for completion of node
address duplication check at the
master
Switch settings are incorrect
System failure
Input/output power is not sup-
plied.
An error occurred in an input/
output circuit.
When dual channels are set: An
error occurred in the other chan-
nel.
: Not lit
Section 7-1
Probable cause and remedy
Check the following items and restart the
DST1.
Are lengths of cables (trunk and branch
lines) correct?
Are cables broken or loose?
Are Terminating Resistors connected to
both ends of the trunk line only?
Is noise interference excessive?
Reset the DST1 so that it has a unique
node address, and then restart the DST1.
Reset the DST1 so that it has a unique
node address, and then restart the DST1.
Check the node address, and then restart
the DST1.
Check to see if the positive side of the
power supply is in contact with the signal
line.
Replace the DST1 if the system failure
still occurs after turning the power supply
ON again.
Check the following items.
Are cables broken?
Is the I/O power voltage within specifica-
tions?
Check the following items.
• Has a ground fault occurred in the
signal line?
• Is the signal line broken?
• Are there any troubles with the con-
nected device?
• Is the power source (positive side) in
contact with the signal line?
• Has a short-circuit occurred in the
signal line?
• Is the discrepancy time setting suit-
able?
• Is the I/O power supply voltage within
specifications?
• Did an EDM error occur?
Details on the error can be read from the
Network Configurator.