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is it possible to switch the CPU from Run mode to Stop mode via programming?

Created by: pachu at: 12/21/2011 8:46 AM (10 Replies)

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12/21/2011 8:46 AM	Rate (0)
pachu Advanced Member Joined: 7/15/2011 Last visit: 3/3/2023 Posts: 48 Rating: (0)	Hi all, is it possible to switch the CPU from Run mode to Stop mode via programming? I mean at a certain date i wanna to switch over the CPU from run to Stop mode and it should not go n Run mode unless i remove the condition which it caused to go in Stop mode.please let me know any such things is possible. Advance New year and Xmas wishes to all.
	Last edited by: O_Moderator at: 12/21/2011 2:25 PM new subject after splitting from /tf/WW/en/Posts/24768#top
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12/21/2011 9:08 AM	Rate (1)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 4/12/2023 Posts: 10221 Rating: (1176)	Take alook at SFC46 (Why to use SFC46 (STP)?). This is only to put CPU in STOP mode. But after no alternative to put CPU in RUN via software, because no user program will run (and for extantion, put the CPU in RUN mode). Best regards, Hristo MIhalev

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12/21/2011 9:10 AM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/15/2022 Posts: 5697 Rating: (707)	Hello, Have a look at the Helpfile for SFB 20, this functionblock can stop a remote CPU and start it again with SFB 19. Another Helptopic to have a closer look at is : Operating mode and mode Transitions. Regards, Marcjan
	Last edited by: Marcjan at: 12/21/2011 9:44 AM Editted some bad copy paste result Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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12/21/2011 9:17 AM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 4/12/2023 Posts: 10221 Rating: (1176)	Marcjan Hello, Have a look at the Helpfile for SFB 20, this functionblock can stop a remote CPU and start it again with SFB 19. Another Helptopic to have a closer look at is : Operating Modes and Mode Transitions _{Regards, Marcjan} Please, fix the link. Thanks.

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12/21/2011 9:47 AM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/15/2022 Posts: 5697 Rating: (707)	Hello, @Umencho, was not a link but a result of some bad copy paste action Have attached the part of theStep7 help topic. Regards Marcjan Attachment Operating Modes and Mode Transitions.pdf (123 Downloads)
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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This contribution was helpful to 1 thankful Users UMENCHO

12/22/2011 10:06 AM	Rate (0)
pachu Advanced Member Joined: 7/15/2011 Last visit: 3/3/2023 Posts: 48 Rating: (0)	Dear all, Thank you very much for the replys..But still i dont know how i can implement these sfb s in my program. for eg if i wanna to switch over the plc to stop on 23 dec2011, what i have to do? I am just in my learning phase, so please let me know in detail.a sample program will help me better.

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12/22/2011 10:16 AM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 4/12/2023 Posts: 10221 Rating: (1176)	With SFC1 read the actual date. How (How can you read out the date and time with SFC1 (READ_CLK) and input them with SFC0 (SET_CLK)? ). Then compare it with a target. If this is a true, take that bit and put it on EN input of called SFC46. But as I understood in your case this STOP mode of CPU might be very dengerous. Take it care! best regards, Hristo Mihalev

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12/22/2011 12:35 PM	Rate (0)
pachu Advanced Member Joined: 7/15/2011 Last visit: 3/3/2023 Posts: 48 Rating: (0)	dangerous in the sense? it wont come to run after dat..i will tell you what is my need. one of our customer havnt paid us the full amount, so my boss asked me to make such software which will stop workinig at a particular time. and it will restart only with the help of us. So how could i do it in a safe way?

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12/22/2011 12:50 PM	Rate (1)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/15/2022 Posts: 5697 Rating: (707)	Dangerous, because no one is there to warn people thatwork will be done at PLC-side, there might be some moving parts or heating systems or whateverthat could behave unespectedly and harm people or dammage machines. Not a good thing to strengthen Customer loyalty 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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This contribution was helpful to 1 thankful Users playerslight

12/22/2011 1:33 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 4/12/2023 Posts: 10221 Rating: (1176)	Forget about that way. (my thoughts have been confirmed using that SFC). My suggestion to you is to make a password protection of software. How (How can you activate the protection level with a password in the HW Config for an S7 CPU?). best regards, Hristo Mihalev

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