Omron NE1A-SCPU01 - 07-2009 Operation Manual page 213

Command Reference: Function Blocks
Muting Starting, Ending, and Stopping Conditions
Note
Note
Override Function
Override Starting and Stopping Conditions
Starting Condition
If an input is normally received for the Muting Signal when the Muting function
block is in a normal state, the AOPD input is ON (the light curtain is not
obstructed), and the Output Enable is ON, muting status will be enabled and
Muting Status will turn ON.
Ending Condition
Muting status will be cleared and Muting Status will turn OFF when the follow-
ing conditions occur.
Muting Mode
Position Detection
Parallel Muting with 2 Sensors
Sequential Muting (Forward Direction) Muting Signal 11, 12, and 21 turn OFF.
Sequential Muting (Both Directions)
Stopping Condition
Muting status will be stop and Muting Status will turn OFF when the following
conditions occur.
• The maximum muting time expires.
• A discrepancy error occurs for the AOPD input.
• A discrepancy error occurs for the override input.
Muting status will be resumed when the muting starting condition is met
again.
In the explanation above, the muting sensors are ON when the workpiece is
detected and OFF when it is not detected.
When the operating mode of the NE1A-series Controller switches from Idle to
Run, input data from the slaves will be OFF until communications are estab-
lished. If slave data is used for the AOPD input, Fault Present and Sequence
Error will turn ON immediately after entering RUN Mode. When the AOPD
input turns ON, Fault Present will turn OFF. When the muting starting condi-
tion is met, Sequence Error will turn OFF.
The override function can be used, for example, to force a machine to operate
to remove an object that has stopped in the detection area of the light curtain.
The override function enables turning ON the Output Enable signal even
when the muting starting condition has not been met.
Starting Conditions
The override will be started when all of the following conditions are met and
Output Enable, Muting Status, and Override Status will turn ON.
• At least one of the muting signals is ON (i.e., the muting sensor is detect-
ing a workpiece).
• The AOPD input is inactive (i.e., the lighting curtain is obstructed).
• The override input is active.
Ending condition
Muting Signal 11 turns OFF.
Muting Signal 11 or 12 turns OFF.
Input Sequences
Muting Signal 11, 12, and 21 turn OFF.
Output Sequences
Muting Signal 12, 21, and 22 turn OFF.
Section 8-5
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