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 Countermeasure
System Failure
Replace the DST1.
Configuration Invalid
Configure the DST1 correctly.
Switch Setting Mismatch
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.
Duplication MAC ID
Check the node addresses of other nodes.
After setting the node addresses to eliminate address
duplication, turn ON the power to the DST1 again.
Transmission Timeout
BusOff
Standard IO Connection Timeout
Safety I/O Connection Timeout
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?
Stuck-at-high Detected at Test Output
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.
Overload detected at Test Output
Check the wiring to see if a ground fault occurred in output
signal line.
Under current is detected using muting
lamp
Check the wiring to see if an output signal line is broken.
If the wiring is okay, replace the external lamp.
Discrepancy Error at Safety Input
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.
Internal input error at Safety Input
Check the following items.
-
Is noise interference excessive?
External Test Signal Error at Safety
Input
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?
Cross connection detected at safety
output
Check to see if the output signal line is in contact with another
output signal line.
Output data error at Safety Output
Check the program to see if output data of dual channels are
the same.
Stuck-at-high Detected at Safety Output Check to see if the power source (positive side) is in contact
with the output signal lines.
If the wiring is okay, replace the DST1.
Short Circuit Detected at Safety Output Check the wiring to see if a ground fault occurred in the output
signal line.
Over Current Detected at Safety Output Check to see if there are any troubles with the connected
device.
Internal Relay relevant Circuit Error
Check the following items.
-
Is noise interference excessive?
Relay Error
Replace the safety relay.
6-6
Summary of Contents for DST1 Series
Page 2: ......
Page 3: ......
Page 4: ......
Page 5: ...DST1 series Safety I O Terminals Operation Manual Produced April 2005 ...
Page 6: ......
Page 24: ...Section 1 Overview ...
Page 44: ...Section 2 General Procedure ...
Page 50: ...Section 3 Configuration ...
Page 63: ...Section 4 Specifications ...
Page 67: ...Section 5 DST1 series ...
Page 79: ...Section 6 Troubleshooting and Maintenance ...
Page 87: ...Section 7 Wiring Examples ...
Page 97: ...Appendices ...
Page 114: ...Cat No Z904 E1 01 OPERATION MANUAL DST1 series Safety I O Terminals ...