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Need to Watch the Variable that are declared in Functional Block

Created by: pavans at: 11/10/2014 2:08 AM (10 Replies)

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11/10/2014 2:08 AM	Rate (0)
pavans Posts: 81 Rating: (0)	Hello Everyone, I have programmed an Algorithm in Functional Block & I need to watch the O/P of the my program which is variable declared in functional Block, please help me in this. thanks pavan
pavans Posts: 81 Rating: (0)
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11/10/2014 2:47 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 4/22/2025 Posts: 6867 Rating: (1367)	pavans Hello Everyone, I have programmed an Algorithm in Functional Block & I need to watch the O/P of the my program which is variable declared in functional Block, please help me in this. thanks pavan Hello pavans, All parameters declared in an FB ,except temp variables, are stored in an instance DB that is defined when you call it. In order to be able to monitor them in a watch table, assign a symbol to the instance DB and use this syntax "Name_of_DB.Name_Paramters".Another option while optimized access to blocks are disabled, you can use the absolute addresses but it is difficult to achieve. I hope these comments help you, Hamid Hosseini
	Last edited by: hdhosseini at: 11/10/2014 2:48 AM Demo Channel on Youtube
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11/10/2014 2:56 AM	Rate (0)
pavans Posts: 81 Rating: (0)	Hello Hosseini Thank You very much for your reply, I need to know Where can I find that Instance DB. I am trying to look at that variable before I download it in the CPU. So can we watch those outputs if we dont download it in to the cpu, I think so because my program doesnot have any external input & output just it need local time. Please help me
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11/10/2014 3:11 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 4/22/2025 Posts: 6867 Rating: (1367)	pavans Hello Hosseini Thank You very much for your reply, I need to know Where can I find that Instance DB. I am trying to look at that variable before I download it in the CPU. So can we watch those outputs if we dont download it in to the cpu, I think so because my program doesnot have any external input & output just it need local time. Please help me Hello again, When you call an FB, you will find the instance DB assigned to that application.Without downloading a DB to PLC,It is not possible to monitor any variable because they don't exist online.Without downloading, you can keep the initial values and default values assigned for each variables.Only inputs,outputs, inputs/outputs and static data can be monitored in an instance DB,I think local (temp) varaibles are not valid for more than one cycle and you can not monitor them via watchtable.Try to transfer those local variables to at leat static variables to be able to watch them. With regards, Hamid Hosseini
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11/10/2014 3:22 AM	Rate (0)
pavans Posts: 81 Rating: (0)	Hello Hosseni I am unable to understand how to watch the instance DB when we call an FB. I will send you my projec, Will you please check & let me know where to find it please??
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11/10/2014 3:26 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 4/22/2025 Posts: 6867 Rating: (1367)	pavans Hello Hosseni I am unable to understand how to watch the instance DB when we call an FB. I will send you my projec, Will you please check & let me know where to find it please?? That is OK, but my TIA Portal is really old here and I can not open projects from newer versions, I will provide you some snapshots to find out the procedure.It may need some time, but mine will be straightforward, for sure. Attachment neu_S7_300.zip (247 Downloads)
	Last edited by: hdhosseini at: 11/10/2014 3:43 AM Demo Channel on Youtube
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11/10/2014 3:41 AM	Rate (0)
pavans Posts: 81 Rating: (0)	Thank You hosseini my TIA portal is V 13. I will be waiting for your reply. If you can please send me how to do Serial Communication using TIA portal with RS 232 devices Thank you very much pavan
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11/10/2014 3:47 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 4/22/2025 Posts: 6867 Rating: (1367)	pavans Thank You hosseini my TIA portal is V 13. I will be waiting for your reply. If you can please send me how to do Serial Communication using TIA portal with RS 232 devices Thank you very much pavan Hello again, For the current question find the attachment here (neu_S7_300.zip ). Please , start another thread and ask your question about serial communication with details such as type of controllers and communication processor.The best conference for such a question will be "Communication / Networks". I hope this discussion helps you, Hamid Hosseini
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11/10/2014 6:17 AM	Rate (0)
pavans Posts: 81 Rating: (0)	I did the same but I dont know why I am unable to find the instance DB
pavans Posts: 81 Rating: (0)
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11/10/2014 12:06 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 4/22/2025 Posts: 6867 Rating: (1367)	pavans I did the same but I dont know why I am unable to find the instance DB Hello again, Please upload the step-by-step procedure of what you did in form of snapshots.I hope it includes all details to find the cause of your problem. @William B. :Thank you for following queries in details,But still initiator has the chance to provide more facts as requested for a solid conclusion. Best regards, Hamid Hosseini
	Last edited by: hdhosseini at: 11/10/2014 5:53 PM Demo Channel on Youtube
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