Citect Functions

[DJShardy]

Hey,
Using Citect 6.1
I need to display a number to show how many days pumps have been turned off for.

How often will Ci-code get called to run if I place it inside a Genie?

I have written a Function to make this happen but I am having trouble using it. When I say the Argument is "pumpOn" that is coming from a PLC Tag.'

INT 
FUNCTION DaysPumpsTurnedOff(INT pumpOn)

INT timeSwitchedOff;
INT daysOff;

IF pumpOn = 0 THEN
	IF timeSwitchedOff = 0 THEN
		timeSwitchedOff = TimeCurrent;  // Capture when the pump was turned off	
	END						
	daysOff = DateSub(TimeCurrent,timeSwitchedOff) / 86400; //Find out the seconds between when the pump was turned off and now.
	
	RETURN daysOff;
ELSE
	daysOff = 0												// Reset to zero if the pump is on 
	timeSwitchedOff = 0;
END

I just want it to display a number on the Page and that's it.

Is it possible to display a Ci-code variable on a page?

Instead of a function can I perhaps modify that code and store the value in the PLC and place it straight into a text box on the page?

Cheers

 

[sigmadelta]

The best way is to create an Event that executes every x amount of time. You can use triggers instead, or a hybrid of both. Go to System -> Events in the Citect Project Editor.

 

[sigmadelta]

You can make a Tag equal the return value of your Cicode.

 

[sigmadelta]

PS: I would say the PLC is a better way to calculate such values.

 

[DJShardy]

Thanks for the speedy reply.

The plc is looking like an easier way todo it. RS 5 would have some kind of time keeping block I imagine? I could use then just write it to an int tag and simply display that on the scada page?

 

[DJShardy]

Actually, what do I use in the trigger / action boxes for my situation?

 

[sigmadelta]

The trigger is optional, you can use the timer alone. The action is any Cicode function you want. You can set a Cicode function to return a value, and in your action say:

DAYS_RUNNING = Calculate_Days_Running(PUMP1_ON)

PUMP1_ON for example, would be the input to your Cicode function (Calculate_Days_Running), and you can assign the return value to a tag (ex: DAYS_RUNNING)

 

[jimtech67]

you can put a ciCode function in the Numeric expression box.
see Cicode below and picture


you need the "RETURN" statement at the end of the code



***************************************************************

REAL FUNCTION poll_precentage(REAL polls,REAL t_outs)
REAL percent;

IF polls > t_outs THEN
percent = ((polls - t_outs) / polls) * 100
ELSE
percent = 0
END


RETURN percent
END
*****************************************************