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Reading timed interrupt exc freq

Created by: henric.p at: 5/16/2014 10:58 AM (3 Replies)

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5/16/2014 10:58 AM	Rate (0)
henric.p Posts: 14 Rating: (0)	In S7-300 i read from the temp data in ob35 the excecution frequency and converted that to a time that I used with the PIDs so if the end costumer changed the interrupt time in the HW config the program would still work. In s7-1500 i cant see a way of doing this. Anyone?? Likewise in the OB1 there was a temp variable for the last scantime that is also gone.. Used RD_Sinfo in a block called constants to make all the constants i liked to use in the program..
henric.p Posts: 14 Rating: (0)
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5/16/2014 12:07 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 1/22/2025 Posts: 4396 Rating: (1464)	Hi, if you use the PID_Compact/ PID_3Step, you don't need to set manually the execution time. To get the time interval you can use: - offlinke know how (if you create the block you know the time that it has). - OB internal (temporary variables - sinse you use nom optimize mode) - ~~RT_info, mode 1 (that measure just the runtime, not th time interval).~~ - RUNTIME block An example of these methods are show in http://support.automation.siemens.com/BR/view/en/87668055
	Last edited by: Pegaia at: 5/19/2014 12:41 PM Denilson Pegaia Siemens Industry Sector Technical Support
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5/16/2014 1:45 PM	Rate (0)
henric.p Posts: 14 Rating: (0)	Can anyone confirm that RT_INFO works with the PLC simulator?? We cannot get it to work with the simulator and do not have a real cpu here..
henric.p Posts: 14 Rating: (0)
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5/19/2014 12:42 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 1/22/2025 Posts: 4396 Rating: (1464)	Hi, really sory for the mistake : The RT_INFO just measure the runtime, not the time interval. I correct the open post. An example how to measure it stay on http://support.automation.siemens.com/BR/view/en/87668055
	Denilson Pegaia Siemens Industry Sector Technical Support
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