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CTU

Forum: Engineering 🇬🇧

Creator: tomoklc

Created: 2013-01-09

Updated: 2013-01-09

tomoklc - 2013-01-09

Please can anybody tell me how to create counter up with math instructions??

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Hi, do you mean structured text?
If yes, you can use it like this:

PROGRAM PLC_PRG
VAR
   fbCTU1: CTU;
   xCountUp1: BOOL;
   uiCounter1: UINT;
   xReset1: BOOL;
   xCountUp2: BOOL;
   uiCounter2: UINT;
   xReset2: BOOL;
END_VAR

// CTU Function-block
fbCTU1(
   CU:= xCountUp1, 
   RESET:= xReset1, 
   PV:= 100, 
   Q=> , 
   CV=> uiCounter1);
   
// Or
IF xCountUp2 THEN
   uiCounter2 := uiCounter2 + 1;
   xCountUp2 := FALSE;
END_IF
IF xReset2 THEN
   uiCounter2 := 0;
END_IF

tomoklc - 2013-01-09

Thank for that, but I must do CTU in ladder diagram only with math and compare instruction!

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tomoklc - 2013-01-09

Everytime when I put "1" on my firt input some memory registar must increase for 1.

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TimvH - 2013-01-09

See screenshot for an example

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