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help with vat

Created by: lesko at: 8/8/2011 8:39 PM (5 Replies)

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8/8/2011 8:39 PM	Rate (0)
lesko Posts: 76 Rating: (1)	Hello! I have a problem when I want to monitor variables with VAT. When I create it and I try to monitor variables I get the message: "The address cannot be monitored". Can someone explain me why I get this message.
lesko Posts: 76 Rating: (1)
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8/8/2011 8:47 PM	Rate (0)
kjulienh Advanced Member Joined: 4/16/2007 Last visit: 5/24/2023 Posts: 4 Rating: (4)	Which type of variables do you want to monitor? Monitoring of the P-address area is not possible. You should transfer them to a DB or the M-range. All other variables can be monitored if they are available in the CPU.

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8/8/2011 9:13 PM	Rate (0)
lesko Posts: 76 Rating: (1)	Thank you for fast reply. I am monitoring boolean and integer variables. But I don't think that is a problem. I created an FB but I don't know if I have to call it (like you should when you are programming in C) in some other part of the program like OB1. This maybe a trivial question but I am new in programming PLC's.
lesko Posts: 76 Rating: (1)
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8/8/2011 9:15 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 6/2/2023 Posts: 6803 Rating: (1345)	kjulienh Which type of variables do you want to monitor? Monitoring of the P-address area is not possible. You should transfer them to a DB or the M-range. All other variables can be monitored if they are available in the CPU. Hi Check the attachment as part of STEP7 online manual: peripheral outpusts can not be monitored in a table but they can be modified. peripheral inputs can be monitored in a table but they can not be modified (Force). Attachment VAT.zip (632 Downloads)
	Last edited by: hdhosseini at: 8/8/2011 9:37 PM Demo Channel on Youtube
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8/8/2011 9:19 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 6/2/2023 Posts: 6803 Rating: (1345)	lesko Thank you for fast reply. I am monitoring boolean and integer variables. But I don't think that is a problem. I created an FB but I don't know if I have to call it (like you should when you are programming in C) in some other part of the program like OB1. This maybe a trivial question but I am new in programming PLC's. Hi Yes, you have to call an FB in OB1. If you are newcomer to the STEP7,you need to read the following manuals: http://support.automation.siemens.com/WW/view/en/18652511 (Quick help) http://support.automation.siemens.com/WW/view/en/45531107 Best regards
	Last edited by: hdhosseini at: 8/8/2011 9:20 PM Demo Channel on Youtube
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8/8/2011 9:34 PM	Rate (0)
poya_xp Posts: 167 Rating: (4)	hdhosseini kjulienh Which type of variables do you want to monitor? Monitoring of the P-address area is not possible. You should transfer them to a DB or the M-range. All other variables can be monitored if they are available in the CPU. Hi Check the attachment as part of STEP7 online manual: peripheral outpusts can not be monitored in a table but they can be modified. peripheralINPUTS can be monitored in a table but they can not be modified (Force). No offence but your text needs to be edited in the underlined part
poya_xp Posts: 167 Rating: (4)
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