Roland udk20 Manual page 76

Communication with the PLC

Check whether the output OUT0 „Enable" has switched to HIGH (ready for operation), otherwise there is a fault
condition.
Before starting measurement, all inputs must be switched to LOW for 30 ms.

Switch the input IN1 „Measurement Start" to HIGH.

Within 30 ms, the outputs OUT 1-3 have switched to HIGH for the duration of the measurement

(system reaction time, see chapter 2.2 - depending on material and thickness).
The measurement result is available after the systems reaction time t

starts again. An additional recovering time of 0.5 seconds is awaited (for FE material).
The measurement result of the 2nd measurement is available at the outputs. The measurement starts again.

Switch the input IN1 „Measurement Start" to LOW.

The measurement is aborted, the last measurement result is now available at the outputs OUT1-3. The measurement result
is frozen until a new cycle is initiated.
Example with „fast" PLC / BUS cycle time (< 20 ms):
Check whether the output OUT0 „Enable" has switched to HIGH.

All inputs must be LOW for more then 30 ms.

Then switch input IN1 „Measurement Start" to HIGH.

Check whether all outputs OUT1-3 switch to HIGH within 30 ms.

Continue to interrogate the outputs OUT1-3, until (after the systems reaction time t

available.
If required, interrogate several measurements.

Then switch input IN1 to LOW.

The measurement is aborted, the last measurement result is now available at the outputs OUT1-3. The measurement result
is frozen until a new cycle is initiated.
Example with „slow" PLC / BUS cycle time (> 20 ms):
Check whether the output OUT0 „Enable" has switched to HIGH.

All inputs must be LOW for more then 30 ms.

Then switch input IN1 „Measurement Start" to HIGH.

Continue to interrogate the outputs OUT1-3 until (after the systems reaction time t

available.
If required interrogate several measurements.

Then switch input IN1 to LOW.

The measurement is aborted, the last measurement result is now available at the outputs OUT1-3. The measurement result
is frozen until a new cycle is initiated.
76
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
Double Sheet Detector R1000 series UDK20
Manual
at the outputs OUT1-3. The measurement
s
) the measurement result is
s
) the measurement result is
s
B0048991 / Rev. 1.3