Skip to Content

Register Login

Default Header

(header konnte nicht geladen werden)

Navigation

Multiple Masters on MPI network

Created by: sfestiva at: 3/16/2007 3:43 PM (2 Replies)

Rating (0)

Thanks 0

3 Entries

3/16/2007 3:43 PM	Rate (0)
sfestiva Posts: 48 Rating: (0)	Is it possible to have an hmi TP270, PLC1 CPU226 AND PLC2 CPU226 communicate over a profibus cable wired from port 0 in both plcs and to the HMI TP270 while doing also NETR from PLC1 TO PLC2? The way i understood is that the HMI needs to be the only master on the bus, even if I take off the "only master on bus" in the protool configuration i still cant see PLC1 but I can see PLC2 Any ideas? Sincerely
sfestiva Posts: 48 Rating: (0)
Suggestion To thank Quote Answer

3/19/2007 8:11 AM	Rate (0)
Helmut_13 Posts: 2930 Rating: (432)	Hi, sorry I do not know the TP270 in detail. But the problem is the kind of communication protocoll you have seleted. If you have selected MPI for communnication at the TP270 then you can connect to max. 4 PLC's but NOT to a PPI-Master. If you change to PPI then the TP270 can only connect to one PLC. Solltution: 1. Use PPI for the TP270. Know you can communicate to the PPI-Master and transfere all data from the second PLC also to the PPI-Master. In this case you can connect to the PPI-Master and the PPI-Master can read/write the data to the secodn PLC. 2. Use one Port for the PPI-communication of the PLC's. Usethe second port for the HMI connection (MPI) at each S7-200 PLC. This means create two networks. One for the communication between the PLC's. The other one to control both PLC's with the TP270. This you can also find in FAQ # 14188898 in the Siemens Internetpages. I hope this helps. Helmut
Helmut_13 Posts: 2930 Rating: (432)
Suggestion To thank Quote Answer

4/3/2007 9:15 AM	Rate (0)
Smurf Silver Member Joined: 9/28/2005 Last visit: 10/24/2024 Posts: 414 Rating: (28)	sfestiva Is it possible to have an hmi TP270, PLC1 CPU226 AND PLC2 CPU226 communicate over a profibus cable wired from port 0 in both plcs and to the HMI TP270 while doing also NETR from PLC1 TO PLC2? The way i understood is that the HMI needs to be the only master on the bus, even if I take off the "only master on bus" in the protool configuration i still cant see PLC1 but I can see PLC2 Any ideas? Sincerely Hi, Your question is answered here. It will workwith MPI.
	Smurf "The only difference between a problem and a solution is that people understand the solution."
Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Follow us on