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altenately start pumps

Created by: automation_1 at: 6/7/2011 10:05 PM (5 Replies)

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6/7/2011 10:05 PM	Rate (0)
automation_1 Posts: 133 Rating: (2)	using microwin with s7/200 it is quik to write instructions to alternately start 2 pumps every 24 ore; but with Step7 I `m finding only quite complex solutions; can anyone give me an advice about it?
automation_1 Posts: 133 Rating: (2)
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6/7/2011 10:17 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 10/26/2024 Posts: 6852 Rating: (1365)	automation_1 using microwin with s7/200 it is quik to write instructions to alternately start 2 pumps every 24 hour; but with Step7 I `m finding only quite complex solutions; can anyone give me an advice about it? This is just a solution, it is also not difficult to cope with. Also if you have 2, you can define priority to start with say motor1 or motor2.The other problem, what happens if one of the motors has mechanical or electrical problem? [code]L mw100 //HOUR from HMI, 24 in this case L 12 *I T MW102 //How many 5 minutes selected ///////////// AN M0.0 L S5T#150 S //2.5 MIN SD T0 NOP 0 A T0 L S5T#150 S //2.5 MIN SF T1 NOP 0 A T1 = M0.0 /////////////// A M0.0 CU C0 NOP 0 L C0 T MW106 /////////// L MW106 L MW102 ==I = M0.1 //short pulse TIME ELAPSED R T0 R T1 R C0 /////////// A Q0.1 AN Q0.0 A M0.1 S Q0.0//moror1 on R Q0.1 //motor2 off /////////// AN Q0.1 A Q0.0 A M0.1 R Q0.0//motor1 off S Q0.1//motor 2 on [/code] Let me test the codes and inform you. regards
	Last edited by: hdhosseini at: 6/7/2011 10:21 PM Demo Channel on Youtube
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6/7/2011 10:27 PM	Rate (0)
automation_1 Posts: 133 Rating: (2)	thanks,yes 2 pumps; anyway if one has any problems it should start the other then starts always the same pump
automation_1 Posts: 133 Rating: (2)
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6/7/2011 11:28 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 10/26/2024 Posts: 6852 Rating: (1365)	automation_1 thanks,yes 2 pumps; anyway if one has any problems it should start the other then starts always the same pump Check the result,hope to handle the problem. let me try easier solution.Ask if there is any thing unclear. regards Attachment 2pumps.zip (287 Downloads)
	Demo Channel on Youtube
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6/7/2011 11:34 PM	Rate (1)
Ayman Elotaify Platinum Expert Joined: 5/28/2008 Last visit: 11/4/2024 Posts: 4516 Rating: (839)	automation_1 using microwin with s7/200 it is quik to write instructions to alternately start 2 pumps every 24 ore; but with Step7 I `m finding only quite complex solutions; can anyone give me an advice about it? Hello, You can create a time of day interrupt using OB10. Please see the picture attached. In HW config., adjustthe time of OB10 to be called one time every day. Inside OB10 make a toggle bit. I mean, when OB10 be called today, the bit will be high, When it will called tomorrow, the same bit will be low and so on. Then when the bit is high, pump 1 will run and pump 2 will stop. And when the bit is low,pump 1 will stop and pump 2 will run. It will be easy also to manage the pump operation if one of them havea fault, the other one will start to operate. Attachment OB10.JPG (354 Downloads)
	Ayman Elotaify
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6/8/2011 12:34 AM	Rate (1)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 10/26/2024 Posts: 6852 Rating: (1365)	Hello again also check the following attachment provided, every hour an impulse generated in FB1 by using the CPU's real time clock (SFC1).When an hour elapsed, an impulse triggers. see the attachment for more detail. regards Attachment 2nd_sol.zip (311 Downloads)
	Demo Channel on Youtube
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