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R O L A N D
Page 20
Furthermore it is necessary that the control checks all status signals of the UDK20. The 0-sheet signal also
needs to be checked. While measuring, only the 1-sheet signal may occur. If 0-sheet or 2-sheet occurs,
the measured sheet may not be transported on. In such cases, the sheet will usually be deposited, re-picked
and measured again.
•
The control needs to evaluate all status signals !
Checking-up through the 0-sheet signal is to assure that a sheet really is in front of the sensor during
measuring. If 0-sheet occurs while measuring, the measurement is not correct. For example, a defective
sensor holder might prevent the sensor from contacting the sheet. Monitoring the sheet thickness would
then only be performed apparently. In case of double sheet fatal consequences could then result.
3.2 Control unit
The UDK20 is based on the product platform R1000.
Major features of the control unit:
•
Programmable for 255 different sheet thickness and materials
•
Calibration by teaching procedures
•
Digital display of sheet thickness and operating parameters
•
Monitoring of over- gauge and under- gauge limits
•
Monitoring of operating voltage and sensor cable (for broken wire)
•
Optocoupler for direct I/O control via the PLC for fast measurement operations
•
Data storage via serial interface
3.3 Parameters of the control unit
The UDK20 provides for extensive configuration. So, different customer requirements can be served.
Configuration is performed by setting system parameters and program parameters. System parameters are
set only once on commissioning, and will then remain unchanged. Program parameters contain items which
are material and job depending, and enable individual adaptation to the measuring task.
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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