Omron E3X-DRT21 Operation Manual page 123

Monitoring Incident Light Levels of E3X-DA6-P Sensors
Sensor Output ON Incident Light Level Monitoring
This function distinguishes automatically whether the Sensor's operating mode switch is set to L.ON (light-ON)
or D.ON (dark-ON).
• For L.ON (light-ON), the peak incident light level for when the Sensor output is ON is indicated as the Sen-
sor output ON incident light level monitoring data.
• For D.ON (dark-ON), the bottom incident light level for when the Sensor output is ON is indicated as the
Sensor output ON incident light level monitoring data.
The following graph shows the incident light levels when the Sensor output is ON and the Sensor is set to L.ON
(light-ON).
Incident
ON interval A
light level
Peak for ON interval B
Peak for ON interval A
Threshold
Sensor output ON
incident light level
The incident light level for D.ON (dark-ON) when the Sensor output is ON is the bottom instead of the peak.
This operation is as follows:
1. The peak value in ON interval A is held.
2. The moment that the output turns OFF after the ON interval A ends the ON incident light level monitoring
value is refreshed as the peak value for ON interval A.
Note The value of the ON incident light level for the period from the time the power is ON until the Sensor out-
put turns ON and OFF again is as follows:
Light-ON: 0000, Dark-ON: 4000
The above values will change, however, if Zero Reset is enabled.
112
OFF
ON interval B
****
Peak for ON interval A
OFF
Time
Peak for ON interval B
Appendix B