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SIMATIC S7-1200

S7 1200 CPU1214 DC/DC/DC

Thread Starter: Sh@rma   Started: 6/6/2012 9:00 AM   Replies: 7

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  6/6/2012, 9:00 AM
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Hii,
I have a prob with S7 1200 CPU 1214 DC/DC/DC...I Had Updated the CPU Firmware to V2.2.0....but sometimes it automatically changes to STOP mode when incomer supply shut down....
Can anyone Help me...Rnf:lblSmileyTooltip_
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  6/6/2012, 9:12 AM
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Sh@rma wrote:
Hii,
I have a prob with S7 1200 CPU 1214 DC/DC/DC...I Had Updated the CPU Firmware to V2.2.0....but sometimes it automatically changes to STOP mode when incomer supply shut down....
Can anyone Help me...Rnf:lblSmileyTooltip_

Hello Sh@rma,
Can you post your diagnostics buffer entries during the STOP mode and during switching back to RUN mode? Also confirm what is the setting made for the parameter - Startup after Power ON
like this


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  6/6/2012, 9:37 AM
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Hi Sir,
Im Not facing this prob mostly...this is the first time i had this prob..i didnt notice any issues in Online diagnostics....i had just changed the CPU to Run mode through Online....
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  6/6/2012, 10:07 AM
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Sh@rma wrote:
Hi Sir,
Im Not facing this prob mostly...this is the first time i had this prob..i didnt notice any issues in Online diagnostics....i had just changed the CPU to Run mode through Online....

Hello Sh@rma,
Are you using any PID Loops in your program? May be if the problem repeats, you make a note of this settings and then set the startup mode as RUN always.
Reference - How does startup work in an S7-1200?

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  6/6/2012, 10:22 AM
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Hi Sir,
Im using PID_3STEP for controlling the motorised valve for controlling the FLOW..but i didnt get a good result from that...so i didnt use that....but im keeping that cyc.interrupt in my program,,
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  6/6/2012, 11:49 AM
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Sh@rma wrote:
Hi Sir,
Im using PID_3STEP for controlling the motorised valve for controlling the FLOW..but i didnt get a good result from that...so i didnt use that....but im keeping that cyc.interrupt in my program,,

Hello Sh@rma,
It's better if you reset the PLC once to it's factory settings. Also try using the lastest Firmware of the CPU which you use, 'cause they are more stable and with high fidelity.

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  6/6/2012, 8:08 PM
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Hii Sir,
I will try that,,is there any recent firmware update next to 2.2...if is there means..please give me the link and further steps....

Thanks Sir,
M.Sh@rma
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  6/7/2012, 6:58 AM
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Sh@rma wrote:
Hii Sir,
I will try that,,is there any recent firmware update next to 2.2...if is there means..please give me the link and further steps....

Thanks Sir,
M.Sh@rma


Hello Sh@rma,
The firmware v2.2 is the current. I hope that's the end of the road. Excerpt from the S7-1200 system manual (04/2012) 
"Note
You cannot update an S7-1200 CPU V2.2 or earlier to S7-1200 V3.0 by firmware update.
"

We need to wait for some official news on this.

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