Error History - Omron DeviceNet DST1 Series Operation Manual

6-3 Error History

6-3 Error History
The DST1-series Safety I/O Terminals internally store up to 10 error history records.
The history is updated each time an error occurs. When more than ten records exist,
the oldest record will be deleted. The error history can be read using the Network
Configurator.
Message
System Failure
Configuration Invalid
Switch Setting Mismatch
Duplication MAC ID
Transmission Timeout
BusOff
Standard IO Connection Timeout
Safety I/O Connection Timeout
Stuck-at-high Detected at Test Output
Overload detected at Test Output
Under current is detected using muting
lamp
Discrepancy Error at Safety Input
Internal input error at Safety Input
External Test Signal Error at Safety
Input
Cross connection detected at safety
output
Output data error at Safety Output
Stuck-at-high Detected at Safety Output Check to see if the power source (positive side) is in contact
Short Circuit Detected at Safety Output
Over Current Detected at Safety Output Check to see if there are any troubles with the connected
Internal Relay relevant Circuit Error
Relay Error
6-6
Countermeasure
Replace the DST1.
Configure the DST1 correctly.
Check to see if the node address is the same as the node
address used for the previous configuration.
If not, set the node address to that of the previous
configuration, or configure the DST1 again.
If they are the same, replace the DST1.
Check the node addresses of other nodes.
After setting the node addresses to eliminate address
duplication, turn ON the power to the DST1 again.
Check the following items.
- 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 to see if the power source (positive side) is in contact
with the output signal line.
If the wiring is okay, replace the DST1.
Check the wiring to see if a ground fault occurred in output
signal line.
Check the wiring to see if an output signal line is broken.
If the wiring is okay, replace the external lamp.
Check the following items.
- Has a ground fault occurred in the input signal line?
- Is the input signal line broken?
- Are there any troubles with the connected device?
- Make sure the Discrepancy Time setting values are valid.
Check the following items.
- Is noise interference excessive?
Check the following items.
- Is the power source (positive side) in contact with the input
signal line?
- Has a short-circuit occurred in the input signal line?
Are there any troubles with the connected device?
-
Check to see if the output signal line is in contact with another
output signal line.
Check the program to see if output data of dual channels are
the same.
with the output signal lines.
If the wiring is okay, replace the DST1.
Check the wiring to see if a ground fault occurred in the output
signal line.
device.
Check the following items.
- Is noise interference excessive?
Replace the safety relay.