2/14/2017 4:57 PM | |
Joined: 12/9/2010 Last visit: 10/8/2022 Posts: 623 Rating: (77) |
Hi nemanjababic, 1. U can program redundant communication with non-redundant CPU with the help of GET/PUT. Observe the connection status of CPU0[eg. conn. ID 1]. If it fails switch to second CPU connection.[eg. conn. ID 2]. U can use ready/busy/error signals of the blocks for switch-over. 2. There is no problem at all if u r using integrated DP interface. More important is that u should have different connection IDs in netpro and it should be downloaded in all 3 PLCs. |
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2/15/2017 6:55 PM | |
Joined: 12/9/2010 Last visit: 10/8/2022 Posts: 623 Rating: (77) |
Hi nemanjababic, 1. Would I still be able to place HMIs on the non-redundant link as DP slaves in this case? -> Yes. 2. Physically, would I be able to join the two subnets coming out of the CPUs (i.e. connect their interfaces to the interfaces on one side of a Profibus repeater, and have the non-redundant CPUs on a single line coming out the other side of the repeater)? I'm not really clear on the behaviour of the Profibus DP masters in this scenario, i.e separate subnets configured in the software, but same physical bus -> U will need 2 seperate DP interfaces for S7-1200. [Probably second with CP]. |
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2/16/2017 3:58 PM | |
Posts: 11 Rating: (0) |
The original configuration I was referring to is in the "configuration 1" image. Using this configuration (or simply omitting the repeater and connecting the interfaces directly), would it be at all possible to establish any kind of communication to the HMI or S7-1200? What about "configuration 2"? I've come across it in a Siemens manual for connecting HMIs to H systems. Only the repeater connected to the master CPU is supplied power. Would it be possible to use Profibus DP communication to connect both to the S7-1200 as an intelligent slave and to the HMI this way? I've seen that its possible to connect an HMI this way, but can I connect both? Attachmentconnection diagrams.zip (313 Downloads) |
2/18/2017 5:21 PM | |
Joined: 12/9/2010 Last visit: 10/8/2022 Posts: 623 Rating: (77) |
Hi nemanjababic, Can u share that siemens manual? I think U need to again refer the manual for answers. |
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