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R O L A N D
Page 62
6.1.1 System test
The System test must be performed before each measuring cycle. During this test no sheet should
be in front of the sensor. This test serves for detecting the correct function of the unit. Simultaneously
all outputs (also „Enable") are activated for the duration of the system test. After the test all activated signals
are reset again.
System test
0-sheet
1-sheet
2-sheet
Check whether the output OUT0 „Enable" has switched to HIGH (ready for operation),
1
otherwise there is a fault condition.
Before initiating the system test, all inputs must be LOW for 30 milliseconds. No sheet must be
2
in front of the sensor.
Switch the input IN5 „System test" to HIGH.
3
All outputs have switched to LOW within 30 milliseconds.
4
Switch the input IN5 „System test" to LOW.
5
The unit now performs an internal system test. After a maximum time of 100 milliseconds all outputs
6
have switched to HIGH. If the configuration „measurement internal" was selected, this check cannot be
performed since the unit starts the measurement cycle automatically. Therefore the mode
„measurement external" must be used.
Example:
Check whether the output OUT0 „Enable" has switched to HIGH 1. No sheet must be in front of the sensor. All
inputs must be LOW for more than 30 milliseconds 2.
Now switch input IN5 to HIGH 3.
After 30 milliseconds check whether all outputs have switched to LOW 4.
Now switch input IN5 to LOW 5.
After 100 milliseconds check whether all outputs have switched to HIGH 6.
ROLAND ELECTRONIC GMBH · Otto-Maurer-Str. 17 · D-75210 Keltern · Telefon (0049) (07236) 9392-0 · Telefax (0049) (07236) 9392-33
OPERATING INSTRUCTIONS
DOUBLE SHEET DETECTOR R1000 UDK20
B0048991
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