Omron G9SP Series Reference Manual page 79

Safety Device Function Blocks
Note
■ Timing Chart
Normal Operation
AOPD
Input 1 (NC)
AOPD
Input 2 (NC)
Muting
Signal 11
Muting
Signal 12
Output
Enable
Muting
Status
Fault
Present
IDLE to
Synchronization time
RUN
Muting Starting Conditions
Muting Status will turn ON when all of the following muting detection condi-
tions are satisfied.
1. The AOPD signals must be active (light to the Safety Light Current must
not be obstructed).
2. There must be no discrepancy errors.
3. Both of the muting sensors must be OFF.
4. The two muting sensors in condition 3 must detect in the normal sequence.
5. The synchronization time of the two muting sensors in condition 3 must be
within the normal range.
If an error occurs in the above conditions, the following alarms will be output.
• A sequence error will be output if the two muting sensors are not detected
in the normal sequence.
• A synchronization error will be output if the synchronization time of the
two muting sensors is not detected in the normal range.
Also, the Output Enable signal will turn OFF if the AOPD signals become inac-
tive (light obstructed) before the muting status is achieved.
Muting Stopping Conditions (Ending Conditions)
Muting status will be stopped and Muting Status will turn OFF if any of the fol-
lowing conditions occurs.
1. Muting signal 11 or 12 turns OFF in muting status.
2. The Max. Muting Time has elapsed.
Muting and Output Enable will both turn OFF in the following cases.
3. The Safety Light Current is obstructed when muting is stopped in condi-
tions 1 and 2.
4. A discrepancy error occurs in the AOPD signal.
5. A discrepancy error occurs in the override signal (for Dual setting).
Note The muting status will return when the muting starting conditions
are satisfied.
In the above description, the muting sensor is ON when it detects the work-
piece and OFF when it does not.
Section 3-5
57