How to Synchronise time on PLC, Server, Process Historian with Time Synchroniser?

[SA07]

Hi

Can you please confirm how we can synchronise time on our 8 PLC Siemens S7 400,
2 servers, 1 process historian and our Time Synchroniser? What port should be used on the PLC,
servers?

Time Synchroniser SEL-2407
PLC Siemens S7 400

For SEL Relays we have used IRIG B port


[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1620213105/tips/IMG_20210505_120551_vazcat.jpg[/URL]

 

[thermionic1]

I'm not sure about the PLC, but you can get a PCI IRIG card (Meinberg) that can take care of the computer end of things.

 

[RedSnake]

BR. A

“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein

 

[SA07]

Our PLCs, Servers are not connected to the internet.
Also we would like to connect it to same time synchronizer SEL-2407 we have on site. This is because our fault recorder, SEL relays are connected to this time synchronizer. Whenever we have a plant trip we can analyse the sequence of events of various parts of the plant e.g boiler, alternator, transformer, utility line.

 

[RedSnake]

Have a look at the grey marked options.
Under Simatic Mode and under NTP server.
We don't use them so I don't know what can be done there.
B.R. A


“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein

 

[LionelHutz]

Well, you could run a local NTP server synchronized from the SEL-2407. But, PC can use a IRIG card and there is probably a way to get the IRIG signal into the PLC too. Maybe this will help.

https://support.industry.siemens.co...-in-the-automation-environment?dti=0&lc=en-WW

 

[stevenal]

Using an SEL-2488 network clock instead of the 2407 might simplify matters. It has Irig as well, so it should not affect the other devices.

 

[FacEngrPE]

If you want complete separation from the internet, you can source your time from the Global Navigation Satellite System. This is one of many sources of GNSS based NTP servers.

https://timetoolsltd.com/

Prices range from under $100. to several thousands. Most GNSS reference receivers can be set up as NTP servers, these sometimes show up on ebay.

You can then run a local IP network between your devices to distribute time.

 

[davidbeach]

The SEL-2407 is a GPS clock. The SEL-2488 also includes the Russian equivalent of GPS and can recognize signal spoofing.

I’ll see your silver lining and raise you two black clouds. - Protection Operations