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Timers with variable times

Created by: Clegg at: 10/12/2011 3:02 PM (3 Replies)

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10/12/2011 3:02 PM	Rate (0)
Clegg Posts: 6 Rating: (0)	Can someone please tell me that using a memory area for the time preset is as easy as every other plc on the market? With all other plc's including the s200's, all a fella has to do is plop in a memory area for the time preset and you've got a variable preset on your timer. How is this done with the s7 300(step 7 v5.5)?
Clegg Posts: 6 Rating: (0)
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10/12/2011 3:16 PM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, Have a look at this: /tf/WW/en/Posts/54165 Have a good look a the post from Fritz. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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10/13/2011 8:46 PM	Rate (0)
Clegg Posts: 6 Rating: (0)	If I use an address such as MW20 for an S5 timer preset or MD20 for an SFB4 timer preset, I can alter the timer preset fine. Problem is, there doesn't seem to be a way to make the timer default to anything other than milliseconds when using a memory area as the timer preset. If anyone knows what hoops I have to jump through to have a variable timer that can have a range beyond milliseconds, I'm all ears.
Clegg Posts: 6 Rating: (0)
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10/13/2011 8:54 PM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 9/4/2025 Posts: 12397 Rating: (2717)	Hello Clegg; May I ask how you have formatted your MW20 register for a S5Timer? By default it will be an INT or a Word, where it will default to milliseconds for a timer preset. This is OK fopr a SFB4, since the TIME datatype is read as milliseconds anyway (you can input T#1h30m20s as a TIME value, or L#5420000 (ms) which will represent the same preset). To setup MW20 as a S5Time register, right-click on the register name when you use it in a LAD instruction, and you can choose other datatypes, including S5Time. Then input the value as S5T#30s to have a 30 second timer preset, or S5T#1m20s to have an 80 second preset... It is even easier when using a DB, since you must choose a datatype for each dataword you create; you can select, and you must input a start value for each register, in the correct data format. Hope this helps, Daniel Chartier
	Last edited by: dchartier at: 10/14/2011 3:24 AM Last edited by: dchartier at: 10/13/2011 8:58 PM
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