Omron NE1A-SCPU01 - 2006 Operation Manual page 245

Error History
Message
NE1A-series Controller System Failures
EM Transmission Error
(Destination Device
Absence)
EM Transmission Error
(Destination Buffer Full)
EM Transmission Error
(Command Length
Error)
EM Transmission Error
(New Request
Received)
Received Error
Response (UEM)
Error Related to Power Supply for I/O
Input PS Voltage Low
Output PS Voltage Low
Safety Input Terminal-related Failures
External Test Signal Fail-
ure at Safety Input
Discrepancy Error at
Safety Input
Internal Input Failure at
Safety Input
Test Output Terminal-related Failures
Overload Detected at
Test Output
Stuck-at-high Detected
at Test Output
Under Current
Detected Using Muting
Lamp
Safety Output Terminal-related Failures
210
Unable to transmit
because the destination
device is not on the
network.
Unable to transmit
because the destination
buffer was busy.
Unable to transmit
because the command is
longer than the maximum
length.
Message was deleted due
to receiving the new
request.
Receiving an error
response when the user
explicit message function is
used.
I/O power supply (input) is
not connected.
I/O power supply (output) is
not connected.
Failure in the external wire
at safety input
Discrepancy error
between two inputs at
safety input
Internal circuit failure at
safety input
Overloading was
detected at test output.
Stuck-at-high at test
output
Lower limit error of
current was detected at test
output.
Corrective Actions
Check the following points:
• Node address of the destination node
• Node address of the transmission message
• Make sure the power supply voltage for the destination node is set
within the specification range.
• Make sure the baud rate is the same for all nodes.
• Make sure the cable lengths (of main/branch lines) are not too
long.
• Make sure a cable or wire is not disconnected or loose.
• Make sure terminating resistance is at both ends of the main line
and only at both ends.
• Make sure there is not a lot of noise.
Check the message receive size at the destination node.
Check the response message size from the destination.
Or check that the response size expected in the request message
is correct.
No
Check that the specified service or data size in the user explicit
message matches the destination object specifications.
Check the following points:
• Make sure the power supply voltage is set within the specification
range.
• Make sure that a cable or wire is not disconnected.
Check the following points:
• Make sure the input signal wire is not contacting the power source
(positive side).
• Make sure the input signal wire does not have an earth fault.
• make sure the input signal wire is not disconnected.
• Make sure there is not a short circuit between input signal wires.
• Make sure a failure had not occurred in the connected
device.
• Make sure the set value of discrepancy time is valid.
To recover from these failures, the following conditions are
required:
Latch input error time must have passed, and the root cause must
have been removed.
The target safety input terminal inputs must turn OFF.
When changing the discrepancy time, reconfiguration is required.
Replace the unit if the system failure still occurs after cycling the
power supply.
Check whether the output signal wire has an earth fault or is over-
loaded.
Check whether the power source (positive side) is contacting the
output signal wire. After the latch input error time has passed, turn
OFF the input when the cause of the error has been removed, and
the error will be reset. If there is no fault with the wires, replace the
unit.
Check whether the output signal wire is disconnected.
If there is no fault with the wires, check the indicators.
Section 10-4