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Timer in S7-Graph

Created by: Gerdoo at: 11/15/2013 5:24 PM (1 Replies)

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11/15/2013 5:24 PM	Rate (0)
Gerdoo Posts: 23 Rating: (2)	Hi All, Assume that we want to monitor a condition for a specified period of time in a STEP and if the condition remain stable, then change to next STEP. For example, I want to verifiy the Hysteresis of an analog value in a STEP. IT means if the value is of ANALOG is between two limits for 5 seconds, then Transition would be satisfied and control goes to next STEP. But the timers available in S7-Graph (TL, TD, TR) will be latched and are not useable because the disturbance of analog signal should reset my timer. I have done this by using a SDTimer out of S7-Graph (like in a LAD FC) and then used the T contact in my transition. I was wondering how can I accomodate this in the Graph. I would be thankful to have your ideas. Thanks.
Gerdoo Posts: 23 Rating: (2)
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11/27/2013 8:14 AM	Rate (0)
Cicero Gold Member Joined: 10/10/2005 Last visit: 3/16/2023 Posts: 1909 Rating: (132)	Hello, regarding to monitoring of STEPs by S7-GRAPH please find the informations of the FAQ. It could be meanful for you. http://support.automation.siemens.com/WW/view/en/1668619 With best regards Cicero

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