Omron E3X-DRT21 Operation Manual page 124

Monitoring Incident Light Levels of E3X-DA6-P Sensors
Sensor Output OFF Light Incident Level Monitoring
This function distinguishes 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 bottom incident light level for when the Sensor output is OFF is indicated as the
Sensor output OFF incident light level monitoring data.
• For D.ON (dark-ON), the peak incident light level for when the Sensor output is OFF is indicated as the
Sensor output OFF incident light level monitoring data.
The following graph shows the incident light levels when the Sensor output is OFF and the Sensor is set to
L.ON (light-ON).
Incident light
level
Threshold
Bottom for OFF interval A
Bottom for OFF interval B
Sensor output OFF
incident light level
The incident light level for D.ON (dark-ON) when the Sensor output is OFF is the peak instead of the bottom.
This operation is as follows:
1. The bottom value for OFF interval A is held.
2. The moment that the output turns ON after the OFF interval A ends the OFF incident light level monitoring
value is refreshed as the bottom value for OFF interval A.
Note The value of the OFF incident light level for the period from the time power is ON until the Sensor output
turns OFF and ON again, is as follows:
Light-ON: 4000, Dark-ON: 0000
The above values will change, however, if Zero Reset is enabled.
ON OFF interval A ON
****
Bottom for OFF interval A
OFF interval B
Time
Bottom for OFF interval B
Appendix B
113