Rockwell Automation DeviceNet SEMINAR LAB EX - Manual (Page 35)

DeviceNet Seminar Lab Exercises 35
Publication 1787.6.1 - August 1997
Testing the Low-Margin Capability
Low margin is determined by the sensor when it is not receiving enough light
for optimum operation. The amber status indicator is lit but the green margin
status indicator is not when in low margin mode.
1. Double-click Parameter 3R.
Notice that the operating margin of the photoeye is OK.
2. Choose
3. Swivel the reflector out of position until the outermost green margin status
indicator on the photoeye goes off and the amber indicator is still on. The
parameter setting will show low margin.
Notice the red light on the RediSTATION operator interface blinks and
the DL10 Dataliner display show a PHOTO OUT OF MARGIN message.
This message is made available to the SLC-500 processor for control
purposes.
Note: While low on margin, the photoeye will still operate correctly. It
is just alerting you that something is wrong. Maybe the lens is getting
dirty or the reflector has moved.
To demonstrate this feature while the reflector is still swiveled out of
position (low on margin), place your hand between the reflector and the
photoeye. The RediSTATION operator interface’s light goes on.
4. Reposition the reflector so all three status indictors on the photoeye are
on solid.
5. Choose Stop Monitor.
6. Choose