Zander Aachen ZX20T, Operating Manual

Page: 37 / 44

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Operating Manual ZX20T/TP/TC
In the logic part of the program, marked by "LOGIC-PART", the actual program is
written. Here, the signals of the light barriers are debounced with 200 ms first. This
ensures that only passing components activate the light barrier.
Through an IF query the status bit of the respective sorting is set. If the component is
too high and passes the light barrier, Fail1 is set to 1, otherwise Fail1 is set to 0. A
similar condition is set for the second sorting. If the color is wrong and the light
barrier is passed, Fail2 is set to 1, otherwise Fail2 is set to 0.
Finally, the output signals are assigned. For this purpose, the outputs are switched
over a defined period of time.
In the last part of the program, marked by „TAKTUNG“, the different timers are
defined. The first trapdoor is controlled via "timerDoor1". As soon as Fail1 is
activated, the trapdoor is opened for a period of 1200 ms and then closed again.
"timerDoor2" is defined similarly.
„timerHigh“ and „timerColor“ are timers which maintain a faulty sorting signal until the
corresponding component arrives at the trap door.
PROGRAM Sort
PLC_NAME = "Good / Bad";
PLC_TYPE = "ZX20T";
(*************************DECLARATION*******************)
VAR_INPUT
High AT In_01;
Licht1 AT In_02;
Color AT In_03;
Licht2 AT In_04;
END_VAR;
VAR_OUTPUT
Door1Open AT Out_01;
Door2Open AT Out_02;
END_VAR;