Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

Y link to S7 315 -2 DP redudntand system

Created by: e_ashish at: 10/29/2009 1:18 PM (7 Replies)

Rating (0)

Thanks 1

8 Entries

10/29/2009 1:18 PM	Rate (0)
e_ashish Posts: 37 Rating: (0)	Hi All I am planning to design redudndant control system with S7 315-2 DP CPU, I have 4 MM440 drives as a slave divce on netwrok in addition to field IOs & need to communicate with third party DCS on profibus ( DCS is slave ). My question is how I have to do as i cant put Porfibus DP CP in ET 200 M rack . Can I use Y link for same so that i can take 2 profibus from 2 cpus & connect to Y link & connect nxt slave devices on link further
e_ashish Posts: 37 Rating: (0)
Suggestion To thank Quote Answer

10/29/2009 4:29 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Hello, I am sorry but a CP 342-5 is a CP which uses the K-Bus. K-Bus notes may not be used in ET200M at all. As I am not really sure what constellation you talk about... may you offer us some sketch to see what you really want to do? Thank you in advance Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
Suggestion To thank Quote Answer

10/30/2009 6:37 AM	Rate (0)
e_ashish Posts: 37 Rating: (0)	Dear Bell thanks for reply Here I am with my two option , I will request you to check & please suggest thatwill these option will work & or not. 1) In this option I am using Y link for 2 profibus links from 2 cpus . 2)In option 2 I am using CP 342-5 on both CPU rack & So that I will get 2 profibus link & connect Y link to these profibus links Hope this sketch will clear the things to you In case above said options are not ok i will request you to suggest the schematic I should prefer Thanks in advance Regards Ashish Attachment OPtion 1.JPG (213 Downloads)
e_ashish Posts: 37 Rating: (0)
Suggestion To thank Quote Answer

10/30/2009 7:07 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 11/7/2024 Posts: 3026 Rating: (1057)	Hello e_ashish I'm afraid that using a Y-Link (and/or DP/PA link) on a Software Redundant Systemis NOT an offically supported solution. You'll find some more useful info in this thread: S7-300SWR with DP/PA links Note that you cna do what you intend to in an S7-400 H system though. I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
Suggestion To thank Quote Answer

10/30/2009 8:41 AM	Rate (0)
e_ashish Posts: 37 Rating: (0)	Fritz thanks for suggetion , If both the things cant work do u have any alternate solution or schematic I can implement to achive same funtionality Regards Ashish
e_ashish Posts: 37 Rating: (0)
Suggestion To thank Quote Answer

10/30/2009 12:30 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Hello, how about the use of the smallest S7-400 H System? Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
Suggestion To thank Quote Answer

10/31/2009 12:26 PM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 11/7/2024 Posts: 3026 Rating: (1057)	You could also consider doing the control/status VSD interfacein the "old fashioned" way via hardwired I/O's from your ETM200 stations. Should you go down this path itwill however NOT help you with the proposed DCS Profibus DP Slave link. For this you could hypothetically use an additional CP342-5 per 315 CPU. The CP will the DP Master for your DCS and you wouldcall the required DP_SEND and DP_RECV blocks for the CP342-5 in the redundant section of your software. This means the CP342-5 in the Master CPU will handle the "DCS DP Slave" (parameterise & configure it on startup as well as doing the comms), wheras the CP CP342-5 in standby CPU will be in STOP state and do nothing (until such time that a changeover take places from Master to Standby CPUin which case it will start handling the "DCS DP Slave". The downside: You'll loose comms to the DCS for a little while during changeover between the CPU's. Sounds all a bit messy, doesn't it?, so I'm with J_Bell on this one and advise you to go for a S7-400 H system instead of a Software Redundantsolution. I hope this helpsand good luck
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users J_Bell

11/4/2009 6:16 AM	Rate (0)
e_ashish Posts: 37 Rating: (0)	Fritz& Bell Thanks for your suggestions. , Now i am taking VSD on Hardwaired IO & DCS on CP 341 instade of Profibus . . Ashish
e_ashish Posts: 37 Rating: (0)
Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Follow us on