Wenglor P1PA00 Series, Руководство по эксплуатации

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19 Photoelectronic Sensors
7.1.2. Dynamic Teach-in
All intensity values from the background and the marking are continuously recorded with this function.
The ideal switching threshold is calculated based upon these values.
This function is intended for applications where the objects to be scanned move continuously at a constant
speed, and cannot be brought to a standstill within the production process.
Example 1: Detection of luminescent adhesive strips on unprinted packaging material, which is
fed in continuously: Dynamic teach-in mode can be started regardless of the position
of the light spot.
Example 2: Detection of luminescent markings on rapidly rotating parts: Dynamic teach-in mode
can be started regardless of the position of the light spot.
If the difference between the two recorded intensity values is too small, the output switching status indicator A1
flashes rapidly (8 Hz) and the switching thresholds are not updated.
• Install the sensor in accordance with the mounting instructions.
• Press and hold the teach-in key until switching status indicator A1 starts flashing rapidly (4 Hz) after 5 sec-
onds.
• Release the teach-in key.
• Recording starts while the LED continues to flash rapidly at 4 Hz.
• The sensor alternately detects the marking to be detected and the background.
• Press and hold the teach-in button for 2 seconds to end recording.
• Release the teach-in key.
• The intensity value with calculated switching threshold is taught in and LED A1 flashes for 1 second to con-
firm successful teach-in. If the teach-in was not successful, LED A1 flashes rapidly (8 Hz).
The procedure must be repeated.
• The intensity value with the calculated switching threshold is taught in, and LED A1 flashes for 1 second to
confirm successful teach-in.
• If the teach-in was not successful, this is signaled by LED A1 flashing rapidly (at 8 Hz). The procedure must
be repeated.
7.1.3. Teach-In Input
Teach-in
The teach-in input on pin 5 can be set by following the same procedure as with the teach-in key (see sections
“7.1.1. Two-point Teach-in” on page 18 and “7.1.2. Dynamic Teach-in” on page 19 ). An activated input
corresponds to a depressed teach-in key.