SFB20 Using

tecno44 · Nov 27, 2020

Hello

I have 2x CPU 315-2DP / PN and ProfinetIO communication.(with on ethernet network)

I am currently exchanging data.
but i want to stop and reboot the other remote cpu.

How can I use SFB20

I found this document but I could not understand it, I did not work.

And returned the following error.

sigmadelta · Nov 27, 2020

but i want to stop and reboot the other remote cpu.

Why?

If you have network access to the remote CPU, you have to go online using STEP 7 (V5.x or TIA Portal) to STOP and RUN the CPU.

JesperMP · Nov 27, 2020

S7 315-2PN/DP does not support SFB20.

tecno44 · Nov 27, 2020

JesperMP said:
S7 315-2PN/DP does not support SFB20.

Is there a document that it does not support?
Thank you.

tecno44 · Nov 27, 2020

sigmadelta said:
Why?

If you have network access to the remote CPU, you have to go online using STEP 7 (V5.x or TIA Portal) to STOP and RUN the CPU.

I want to make a redundant system. Running plc to stop the other

JesperMP · Nov 27, 2020

In the specifications of the S7-31x and S7-31xC CPUs are listed what SFBs and SFCs are supported, not what is not supported. SFB 20 is not listed as supported.

Also, in your other thread on the same topic (!), you wrote yourself that SFB 20 was not on the CPU.

tecno44 · Nov 27, 2020

sigmadelta said:
Why?

If you have network access to the remote CPU, you have to go online using STEP 7 (V5.x or TIA Portal) to STOP and RUN the CPU.

JesperMP said:
In the specifications of the S7-31x and S7-31xC CPUs are listed what SFBs and SFCs are supported, not what is not supported. SFB 20 is not listed as supported.

Also, in your other thread on the same topic (!), you wrote yourself that SFB 20 was not on the CPU.

Yes, i wrote. but when i check it SFB14 is also not in the CPU. But it works?

I think there are people who run and use it in some forums.

JesperMP · Nov 27, 2020

tecno44 said:
I want to make a redundant system. Running plc to stop the other

There is a software redundancy solution for S7-300.
But it is not a good solution.
Siemens themselves once told me "do not use it".

6ES7862-0AC01-0YA0
SIMATIC S7, SW redundancy V1.2 single license for 1 installation R-software (for two CPUs), SW and documentation on CD, Class A, 5 languages(de,en,fr,es,it) Executable in Win95/98/ME/ Windows NT/2000 Prof., Reference HW: SIMATIC S7-300/400 CPU 315 and higher

tecno44 · Nov 27, 2020

JesperMP said:
There is a software redundancy solution for S7-300.
But it is not a good solution.
Siemens themselves once told me "do not use it".

yes, siemens does not find SW suitable for s7300 series. I can say that there is no support. but I can make an independent backup system in my own project !!!

tecno44 · Nov 27, 2020

tecno44 said:
Yes, i wrote. but when i check it SFB14 is also not in the CPU. But now it works.

I think there are people who run and use it in some forums.

I am currently doing data transfer with sfb15

tecno44 · Nov 27, 2020

tecno44 said:
Hello

So what does the footnote here mean?
What should I write to the PI_Name?

P_Program bölümü CPU da neresi oluyor ? M100.0 ??

sigmadelta · Nov 27, 2020

The thing is, even if SFB20 works and you stop the CPU, there is no way to start it again unless you either turn the RUN/STOP switch to STOP then RUN, or use STEP 7 software to put the CPU back into RUN. There is no way via PLC code to make a CPU go into RUN.

JesperMP · Nov 27, 2020

tecno44 said:
I am currently doing data transfer with sfb15

SFB14 and SFB15 are only supported on S7-400.

An S7-300 can respond as server to a PUT or GET from another PLC as client. There will then be no PUT or GET on the S7-300 as server.

When using PUT or GET with an S7-300 as client, you should use the FB14/FB15 from the standard library.
If you use an CP for the connection you must use FB14 or FB15 from the SIMATIC_NET_CP library.
That is, not SFB14 or SFB15.

sigmadelta · Nov 27, 2020

If you insist on looking into stopping the CPU, check the SFC46 - STP function.

JesperMP · Nov 27, 2020

Is the redundancy needed for high uptime in a production scenario ?
Or is the redundancy needed to provide a more reliable system that handles critical safety for persons, for example smoke evacuation from tunnels, electrical power supply in hospitals, etc..
If it is the latter, dont make a do-it-yourself design.

SFB20 Using

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