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S7-1200 stays in stop mode

Created by: am@solidfog at: 8/14/2015 9:00 AM (5 Replies)

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8/14/2015 9:00 AM	Rate (0)
am@solidfog Posts: 10 Rating: (0)	Hi everyone, I'm working on CPU S7-1200 1214C DC/DC/DC; The CPU can be slave (I/O device) of a controller or the system managed by this CPU can work independently. The problem is this one: If CPU is OFF (no power supply) and then switched ON when the controller isn't connected on the network, the CPU stays in stop mode during about 1 minute then goes to start. I want to bypass this stop mode of 1 minute and go directly on run mode; why this delay? Because if the controller is disconnected when CPU is in run mode, it stays in run mode but with an error that doesn't affect the process... Could someone help me? ------------------------------------------------------------------------------------------ Split from Reason: S7 1200 PLC goes to STOP mode during running process??.
am@solidfog Posts: 10 Rating: (0)	Last edited by: Min_Moderator at: 8/14/2015 10:30:32 AM New subject after splitting
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8/14/2015 9:23 AM	Rate (0)
ChristophD Grandmaster Joined: 5/12/2006 Last visit: 11/7/2024 Posts: 22439 Rating: (3029)	Hello, have you the diagnostic buffer of the PLC? Can it be that there is a startup OB is programmed which have this 1 minute delay? Regards Christoph

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8/14/2015 11:22 AM	Rate (0)
am@solidfog Posts: 10 Rating: (0)	Hi Christoph, See attached file to have a look on the diagnostic buffer. It says "No startup inhibit set"; don't really know what that mean. If there's a delay, I should have an inhibit set no? I've got a Startup yes but no delays inside, just boolean conditions, no link with the problem... Attachment Diag buffer.PNG (625 Downloads)
am@solidfog Posts: 10 Rating: (0)
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8/14/2015 3:49 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 11/8/2024 Posts: 15388 Rating: (2443)	The 60 second delay at startup to run you are seeing is the default time for profinet devices to come online before attempting to start the PLC into run mode. This default setting is adjustable. If you want to adjust it, see how long it takes when everything is ok, and set the profinet time to be maybe double that time. Techspray Hi everyone, I'm working on CPU S7-1200 1214C DC/DC/DC; The CPU can be slave (I/O device) of a controller or the system managed by this CPU can work independently. The problem is this one: If CPU is OFF (no power supply) and then switched ON when the controller isn't connected on the network, the CPU stays in stop mode during about 1 minute then goes to start. I want to bypass this stop mode of 1 minute and go directly on run mode; why this delay? Because if the controller is disconnected when CPU is in run mode, it stays in run mode but with an error that doesn't affect the process... Could someone help me? ------------------------------------------------------------------------------------------ Split from Reason: S7 1200 PLC goes to STOP mode during running process??.
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This contribution was helpful to 1 thankful Users Kahl

8/17/2015 1:23 PM	Rate (0)
LasseHamerHedeby Posts: 7 Rating: (0)	Hi You can adjust the statup time under CPU propeties. See attachment. Regards Lasse Attachment S7-1200.PNG (744 Downloads)
LasseHamerHedeby Posts: 7 Rating: (0)
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This contribution was helpful to 3 thankful Users Kahl Vamsi_VVK am@solidfog

8/18/2015 8:06 AM	Rate (0)
am@solidfog Posts: 10 Rating: (0)	Hi everybody, Thank you for your answers. Lasse, you seem to be right. How could it be dangerous to set this delay at 100 ms (minimum value accepted)? Regards. Alexandre
am@solidfog Posts: 10 Rating: (0)
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