DC timer using LOGO!

Hello capricious_capricorn,

look my LOGO-programs at the following links (sorry they are in german language, but i think you understand the programs. But if not tell me here again):

Kann Betriebsstundenzähler nur Stunden anzeigen ?
Program download: Forum_Betriebsstundenzähler.zip

(Betriebsstundenzähler)
Program download: Test_Betriebsstundenzähler_V0.zip

Best regards
Betel

Hello capricious_capricorn,

Ok, ist right, LOGO has a lot of function units, but only one to count time: "Hours Counter" (handbook page 172).
The problem of this counter is, that you can the counter value only display (and not use with or catch to other funktion units) at a textbox but only the hours not the minutes and seconds!

If the LOGO should count time and you wont to manage this value (show, calculate, clear,...) then you must create your own program part! This is what i have done in the demos. Additional this demos shows some different aspects to do time counts.

Concept: A pulsgenerator is the timebase and one or more counter catch the pulses. To count more than one unit of time the counters (but not the last) must create a puls for the next counter in the line (and to do this they must clear cyclic by the own output pulse). The parameters of the pulsgenrator and the first counter sets the precision of the time counting...

The second problem is, that the LOGO-textbox only allow to show one value of a funktion unis at a line! The 2. part of the programsheet solves this problem with a trick over analoge funktion units to show to values at one line (with a point as the field separator. This solution allows only small values, but for your application the range is enough.

Sorry but the old demo are wrong at this part of the sheets. So i have build a program for you witch counts past seconds and minutes triggered by I1 and stoped by I2. The value you can look at one line in a textbox all the time. The counters are cleared automatic by the pulse of I1 without time errors of the counter (! look at the parameters of the units) or from the user with a cursorkey.

But if you only wish to test the signals (and activate a static event message) then you need only same function units. I do not now your exact input signals, but in the sheet i have create two examples to do this in an easy way...

I hope this help you to program your own solution.

MfG
Betel