Omron NE1A-SCPU01 - 07-2009 - Behavior for Power Supply Interruptions; Behavior in Voltage Drop

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Command Reference: Function Blocks Section 8-5
Optional Output Settings
The following outputs can also be used in programming. To enable any of
these optional outputs, select the checkbox on the Output Point Tab Page of
the function block properties dialog box.
• Override Status
• Synchronization Error
• Sequence Error
• Discrepancy Error (AOPD)
• Discrepancy Error (Override)
Fault Present Output Setting
A Fault Present output can also be used in programming.
To enable this output, select the Fault Present checkbox on Output Point Tab
Page of the function block properties dialog box.
Error Handling and Error Resetting
Synchronization Error
A synchronization error can be detected in any mode other than Position
Detection Mode.
A synchronization error will occur and Synchronization Error will turn ON
when the time difference between input signals for the muting signals (i.e.,
muting sensors) exceeds the synchronization time that has been set. If the
AODP input turns OFF (i.e., if the light curtain is obstructed) while there is a
synchronization error, Output Enable will turn OFF and Fault Present will turn
ON.
The condition for a synchronization error are give for each muting mode in the
following table.
Sequence Error
A sequence error will occur and Sequence Error will turn ON when the detec-
tion order of muting signals (i.e., muting sensors)
Muting Mode Condition for synchronization error
Position Detection Not detected.
Parallel Muting with 2 Sensors The time difference between muting signal 11 and
muting signal 12 has exceeded the set value of the
synchronization time.
Sequential Muting (Forward
Direction)
The time difference between muting signal 11 and
muting signal 12 has exceeded the set value of the
synchronization time.
Sequential Muting (Both Direc-
tions)
Input Sequence
The time difference between muting signal 11 and
muting signal 12 has exceeded the set value of the
synchronization time.
Input Sequence
The time difference between muting signal 21 and
muting signal 22 has exceeded the set value of the
synchronization time.