Publication 1752-UM001A-EN-P - October 2006
130 Monitor Status and Handle Faults
Safety Input Error Messages
Message Description Corrective Action
External Test Signal
Failure at Safety Input
A failure has occurred in the external wiring at
the safety input.
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 the input
signal wires.
Make sure a failure has not occurred in the connected
device.
Make sure the configured value of the discrepancy time is
valid.
To recover from this error state, the latch input error time
must have passed and the cause of the error must have
been corrected. The target safety inputs must turn off.
To change the discrepancy time, you must reconfigure the
safety input.
Discrepancy Error at
Safety Input
A discrepancy exists between two inputs
configured as Dual Channel.
Internal Input Failure at
Safety Input
An internal circuit failure occurred at the
safety input.
Replace the unit if the system failure occurs again after
cycling the power supply.
Test Output Error Messages
Message Description Corrective Action
Overload Detected at
Test Output
Too much current is being drawn at the
test output.
Check whether the output signal wire has an earth fault or is
overloaded.
Stuck-at-high Detected
at Test Output
A test output is stuck on. Check whether the power source 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.
Under-current Detected
Using Muting Lamp
The lower limit error of current was
detected at the test output T3.
Check whether the output signal wire is disconnected or if the
muting lamp is burned out. If there is no fault with the wires, check
the LED indicators.
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