Technical data

Manual
Double Sheet Detector R1000 series E20
B0046991 / Rev. 1.6
Communication with the PLC
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6.3.7 Typical measurement cycle for unit in destacking application
In order to warrant reliable functioning of the system the following operating cycle is recommended.
It is recommended to perform step 2 at each cycle.
1. Selection of the desired measuring program.
2. System test (This test should be performed).
See timing diagram chapter “6.3.1 System test“
3. The sensor is lowered onto the stack (this stack contains 1 or more sheets).
4. Measurement in order to detect last sheet in the stack (1-sheet signal = only one sheet in the
stack) provided there is no other metal under the stack.
5. Destack a sheet and move into monitoring position - at least 2 cm (.8 inch) away from stack.
6. Monitor and initiate action depending on measurement result:
• 0-sheet: Repeat destacking operation.
• 2-sheet: Initiate actions to remove double sheet or several sheets from destacker.
After the measure again.
Attention: During the removal operation measurement should be switched off because of
potentially undefined conditions, air gaps between sensor and sheet etc.
• 1-sheet: continue with point 7.
7. Transport sheet into the proper loading position.
8. Measurement to verify that the sensor is still on the sheet.
9. Release the sheet.
10. After de-stacking a sheet perform security check - Is the sheet de-stacked ?
11. Before de-stacking a new sheet perform point 1 “Selection of the desired measuring program“
or point 2 “System test“.
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6.4 Internal control (Demo mode)
In this operating mode the system continuously executes measurements and activates
OUT0 … OUT3.
In general, this operating mode is suitable for demonstration purposes only.
Prerequisite: • Supply voltage applied
• System parameter 4 set to demo mode
• Teach-In has been executed
The external sensor switching via the A/B outputs does not function in this mode.
The refresh rate of the measurement is dependent on the sensor type:
• P30, P42, P42A, P75V 1 Second
• P36 2 Seconds
• P75 4 Seconds