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TIMER problem inside called function

Created by: mrind at: 8/4/2009 9:14 AM (8 Replies)

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8/4/2009 9:14 AM	Rate (0)
mrind Posts: 20 Rating: (0)	REF: Siemens Step 7 Simatic Manager: S7 400 PLC I have one calling function (FC1)and called function (FC2) in my program. Inside FC2, i could not create any local variablesinTIMER data type. It supports TIME, S5TIME data types only. actually I need a TIMER variable inside called function and pass different timers (T1, T2...T10) from FC1 whenever FC2 is called. But is it possible to do so? Regards Mrind
mrind Posts: 20 Rating: (0)
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8/4/2009 9:28 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 9/13/2024 Posts: 3020 Rating: (1054)	mrind actually I need a TIMER variable inside called function and pass different timers (T1, T2...T10) from FC1 whenever FC2 is called. But is it possible to do so? Hello mrind it is, you need to declare an INPUT parameter of FC2 astype TIMER, then you can call FC2 multiple times and pass on a different Timer (e.g. T1, T2...T10) on to each call of FC2. Attached is an example pic which I trust helps in understanding theabove description. I hope this helps Attachment S5Timer FC-FB INPUT parameter example.jpg (249 Downloads)
	Last edited by: fritz at: 8/4/2009 9:41 AM uploaded example attachment Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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8/4/2009 9:39 AM	Rate (0)
mrind Posts: 20 Rating: (0)	Thank you. suppose if i would like to define a timer as output in the called functionand assign a TIMER in calling function, what should i do? regards Mrind.
mrind Posts: 20 Rating: (0)
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8/4/2009 9:46 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 9/13/2024 Posts: 3020 Rating: (1054)	mrind suppose if i would like to define a timer as output in the called functionand assign a TIMER in calling function, what should i do? why do you want to do that mrind (I am not too sure if I understand what you are trying to achive with this)? Anyway, i'm afraid you can NOT declare a TIMER as an FC/FB OUTPUT parameter (it has to be an INPUT).
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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8/4/2009 9:54 AM	Rate (0)
Anchobi Posts: 139 Rating: (25)	I am not sure I understand what you are trying to do however if you require some flexibility in the way that timers are used you can use indirect addressing for this. a simple example would be the call L T[#temp_w] where the #temp_w contains an indexed value or a number passed from another function. ie. if temp_w contained the number 5 then the value of T5 would be loaded
Anchobi Posts: 139 Rating: (25)
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8/4/2009 9:59 AM	Rate (0)
mrind Posts: 20 Rating: (0)	I will explain you. I have one pressure switch and lamp. Once i receive the feedback from the pressure switch, i need to start a timer (on delay for 10 secs) and when the time elapsed i need to make the lamp ON. I have similar condition for 10 no. of units. I dont want to write seperate function to manage this timer and i would like to keep all unit dependent in a single function. (i.e.) FC2 Hope you understand. Regards Mrind
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8/4/2009 10:04 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 9/13/2024 Posts: 3020 Rating: (1054)	have a look at my (belated) previously attached example screendump mrind. The "#_OUT" variable inside FC2 is actually an OUTPUT parameter of FC2 and makesthe "result" of the TIMER (INPUT parameter to FC2) available to FC1. I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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8/4/2009 10:18 AM	Rate (0)
mrind Posts: 20 Rating: (0)	Thank you for all who helped me. My problem is solved now. Regards Mrind
mrind Posts: 20 Rating: (0)
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8/4/2009 10:40 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 9/13/2024 Posts: 3020 Rating: (1054)	Pleased to hear that mrind and just for completeness: I trustyou will have more logic (and Parameters) inside FC2 than whatmy example had (it does not make too much sense to "hide" a TIMER inside an FC which is all that my example did to simply outine the call 'idea").
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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