Dear All,

As i do not have any hardware to test so asking this question

Task- I have two S120 control unit of CU 320-2 PN-DP (address 2 & 3) communicating with the PLC via profinet. I want to know thorough program writing in OB86 if any of them has communication break with PLC. 

Address- Profinet Slave-1 has     Device number = 2, Diagnostic address = 16372

               Profinet Slave-2 has     Device number = 3, Diagnostic address = 16367

Note- Please check the attachment.

Question- I know OB 86 is triggered if any of the Profinet Slave Join or Leaving the communication. The status of #OB86_EV_CLASS = B#16#39 means one of the station has left the communication and #OB86_EV_CLASS = B#16#38 means one of the station has join the communication. and i also know from the help file of OB 86-

lets say slave-1 goes in fault, then what value comes in OB86_Z23 at bit 0 to 10 (or LW8)? and what value comes in OB86_Z23 at bit 16 to 30 (or LW 10) ?

I do not want to use FB126, i am looking for simple and short solution.

Thanks in advance!

Hi All,

I got the reply from siemens support, best and easy is to use SFC51, 

here is the link with example

https://support.industry.siemens.com/cs/cn/en/view/31895566

Regards

A.K Singh

Hi All,

I got the reply from siemens support, best and easy is to use SFC51, 

here is the link with example

https://support.industry.siemens.com/cs/cn/en/view/31895566

Regards

thank you for the link (Y)