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How to identify whether the current time in the given interval?

Created by: Bill1777 at: 2/11/2014 5:11 PM (9 Replies)

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2/11/2014 5:11 PM	Rate (0)
Bill1777 Posts: 223 Rating: (4)	How to identify whether the current time in the given interval? example: I (interval) from 9-15 to 22-40 T (the current time) 13-25 Specify Tag1 = 1 if T is in the interval I (TIA 12, step7 pro, s7-1200)
Bill1777 Posts: 223 Rating: (4)
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2/11/2014 8:17 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 12/30/2025 Posts: 6890 Rating: (1368)	AndyNeva How to identify whether the current time in the given interval? example: I (interval) from 9-15 to 22-40 T (the current time) 13-25 Specify Tag1 = 1 if T is in the interval I (TIA 12, step7 pro, s7-1200) Hello, For S7-1200,I suggest reading the following similar discussion here: Timer CPU S7-1200 hdhosseini Martins_Eng How do I get the time of day, using the PLC clock. For example I want and rode a function in preriodo from 06:00 pm until 14:00 pm and after 14:00 until the 22:00 pm run another function it is possible to do this with 0 S7-1200 CPU using the timer. As the S7-1200 doesn't support Time of Day interrupts,It is possible to implement such a scenario by reading the current time of CPU and compare it with references to trigger functions or manipulate bits.To read the system date and time, you need RD_SYS_T from extended instruction librariy and should save the result in "OUT" as DTL format in a DB.Finally, you can use simple available comparators for DTL data type to generate commands. Best regards, Hamid Hosseini
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2/11/2014 9:43 PM	Rate (0)
Bill1777 Posts: 223 Rating: (4)	of course i useRD_SYS_T and DTL - it absolutly clear!!! but how I canidentify whether the current time in the given interval?
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2/11/2014 10:09 PM	Rate (0)
0_Einstein Grandmaster-Expert Joined: 7/7/2010 Last visit: 12/30/2025 Posts: 16339 Rating: (2520)	AndyNeva of course i useRD_SYS_T and DTL - it absolutly clear!!! but how I canidentify whether the current time in the given interval? From your DTL from the reading of the system time, you can directly access the exact hour/min and do your comparison using IN_RANGE or some such comparison block.
	science guy
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2/11/2014 10:46 PM	Rate (0)
Bill1777 Posts: 223 Rating: (4)	It's impossible use in_range for hour and minut interval
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2/11/2014 10:51 PM	Rate (0)
0_Einstein Grandmaster-Expert Joined: 7/7/2010 Last visit: 12/30/2025 Posts: 16339 Rating: (2520)	AndyNeva It's impossible use in_range for hour and minut interval Convert Time/Hour -> DINT Convert Time/Min -> DINT Possible.
	science guy
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2/12/2014 8:33 AM	Rate (0)
Bill1777 Posts: 223 Rating: (4)	tks I have 20 Interval and convert (than calculate, than compare ) every tag it was sooooooooooo cumbersome task
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2/12/2014 12:23 PM	Rate (0)
0_Einstein Grandmaster-Expert Joined: 7/7/2010 Last visit: 12/30/2025 Posts: 16339 Rating: (2520)	AndyNeva tks I have 20 Interval and convert (than calculate, than compare ) every tag it was sooooooooooo cumbersome task Create a single fb with input parameter your time interval and output a bool indicating if current time is within the interval. Run that 20 times. One code block to do the conversions.
	science guy
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2/12/2014 3:28 PM	Rate (0)
Bill1777 Posts: 223 Rating: (4)	Thanks, but Comparator cantregister interval within hour and minut (we are tryed 100 times) does anybody have other advise ?
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2/12/2014 7:26 PM	Rate (0)
0_Einstein Grandmaster-Expert Joined: 7/7/2010 Last visit: 12/30/2025 Posts: 16339 Rating: (2520)	Bill1777 Thanks, but Comparator cantregister interval within hour and minut (we are tryed 100 times) does anybody have other advise ? The call provides start and stop times as DTL and check time as DTL. Output of the FB is true/false if the time is between start/stop (inclusive). There are hundreds of ways to do this. This took a few minutes to cobble together, so you should be able to adapt to your needs and compare 20 times 20 other intervals. If you call system or local time once and pass it as your test time input, you can find out what time interval you are in. I thought you would be passing a "time" datatype for the test, but quickly realized the only realistic approach would be a DTL datatype to keep everything simple. The calendar (Y/M/D) are ignored, but could be added with similar math. SCL code: [code] FUNCTION_BLOCK "In_Time_Interval" { S7_Optimized_Access := 'FALSE' } VERSION : 0.1 VAR_INPUT "TestTime" {OriginalPartName := 'DTL'; VersionGUID := 'e1abdd20-c0b2-41a8-b93b-3eb5dce20d6b'; } : DTL; "Start" {OriginalPartName := 'DTL'; VersionGUID := 'e1abdd20-c0b2-41a8-b93b-3eb5dce20d6b'; } : DTL; "Stop" {OriginalPartName := 'DTL'; VersionGUID := 'e1abdd20-c0b2-41a8-b93b-3eb5dce20d6b'; } : DTL; END_VAR VAR_OUTPUT "OUT" : Bool; END_VAR VAR_TEMP "TestTime_real" : Real; "Start_real" : Real; "Stop_real" : Real; END_VAR BEGIN // // convert DTLs to REAL to make comparison simple to understand and test // #Start_real := USINT_TO_REAL(#Start.HOUR) + USINT_TO_REAL(#Start.MINUTE)/60.0 + USINT_TO_REAL(#Start.SECOND)/3600.0; #Stop_real := USINT_TO_REAL(#Stop.HOUR) + USINT_TO_REAL(#Stop.MINUTE)/60.0 + USINT_TO_REAL(#Stop.SECOND)/3600.0; #TestTime_real := USINT_TO_REAL(#TestTime.HOUR) + USINT_TO_REAL(#TestTime.MINUTE)/60.0 + USINT_TO_REAL(#TestTime.SECOND)/3600.0; // // set output TRUE only if between the start and stop times // #OUT := (#TestTime_real >= #Start_real) AND (#TestTime_real <= #Stop_real); // END_FUNCTION_BLOCK [/code] The above code can be imported directly into your project for testing using the import external source code in your project tree. {in the unlikely event you were not aware of that option}
	science guy
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