Indicators And Error Processing - Omron DeviceNet DST1 Series Operation Manual

6-1 Indicators and Error Processing

6-1 Indicators and Error Processing
MS NS
Green Red Green Red
- - - -
- - - -
- - - -
: Lit : Flashing
6-2
LOCK I/O PWR I/O
Yellow Green Yellow Red
- - -
- - -
- - -
- - - -
- - - -
- - - -
- - - -
- - - -
-
-
-
-
: Not lit
Description
Safety I/O communications
in progress (normal status)
Standard I/O
communications or
message communications
in progress (normal status)
The DST1 performing
initialization process or
waiting for configuration.
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
supplied.
An error occurred in an
input/ output circuit.
When dual channels are
set: An error occurred in
the other channel.
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?
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.
Replace the DST1.
Check the following items.
Are cables broken?
Is the power voltage within
specifications?
Check the following items.
Has a ground fault occurred in the
signal line?
Is the signal line broken?
Are there any troubles with the
connected device?
Is the power source (positive side)
in contact with the signal line?
Has a short-circuit occurred in the
signal line?