Detection of Ethernet Connection Fail between PLC and HMI

[DanC2188]

Hi, Sorry if this is an existing thread this forum doesn't give me the ability to search prior to posting.

Does anybody know of a way in which i can detect a failure between a S7-300 PLC (code written in Simatic Manager) and a Siemens HMI? (code written in TIA Portal)

I have changed cabling and it seems to have changed the faulty issue, nice and simple! BUT I was asked if there was a way of detecting if an Ethernet cable loses connection to a PLC. I didn't know if there was a bit I can pull from the status or if someone knows of a script that can be written? I have little a very small amount of experience with scripts.

If anyone can help I would be most grateful.

Thanks in advance!

 

[Bit_Bucket_07]

The forum does offer a search capability. Search for "heartbeat".

 

[gclshortt]

http://www.plctalk.net/qanda/showthread.php?t=50230

http://www.plctalk.net/qanda/showthread.php?t=33414

http://www.plctalk.net/qanda/showthread.php?t=86749

The above threads may help you out.
Regards,

 

[jacoffey85]

There is a DeviceStates (FC802) Siemens block, but as far as I know it only works for ProfiNet or ProfiBus. I don't know of one for ethernet.

 

[JesperMP]

Even simpler:
http://www.plctalk.net/qanda/showthread.php?p=626060

 

[DanC2188]

Even simpler:
http://www.plctalk.net/qanda/showthread.php?p=626060

Thank you! That is exactly what I was looking for! Great Answer, thank you again.