After my last disaster with upgrading to DesigoCC four years ago and it still isn’t on-line. Waiting for graphics! I just want to make sure which network is going to be our best option.

I think why are you doing Siemens in the first place?


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I think why are you doing Siemens in the first place?

This is it.

Your issue isn't IP vs. Ethernet. It is who is putting it in and servicing it.

IP is newer, more widely supported, more capable, and easier to troubleshoot than Ethernet.

P2 is obsolete. The newer controllers are the DXMs. You will want those unless you wanna go to eBay for parts. These are the at the terminals (vavs, fcus, etc). The PXCMs run trunks of devices, replacing the MBCs. So, DXMs and PXCMs are not interchangeable. Not one or the other, it is both in different roles.

I make great money working with customers like you who have been dealing with Siemens. There are good Siemens guys. But they are few and far between since Siemens outsourced to India.

If you want a path out, PM or email me.

Waiting for 4 years for a project to finish is not uncommon. But wait until you find out they are also trying to tell you your warranty period is up 3 years ago - 1 year after the project started. And the project is not even done yet.

At some point, you need to see that this is not going to get better and pull the plug.

 

The short answer is use BACnet/IP. Also, then if you decide you don't want Siemens anymore, there are a lot of other BACnet/IP options to choose from, since BACnet is an open protocol.

My understanding is that the proprietary Siemens P1 protocol (which runs on their Floor Level Network, or FLN, to field devices) and P2 protocol (which runs on their Building Level Network, or BLN, between control panels) are obsolete and only used by legacy Siemens equipment. Some time ago, Siemens transitioned to BACnet for both networks - BACnet MS/TP for the FLN and BACnet/IP for the BLN (I think they also renamed BLN to ALN for Automation Level Network).

For additional details on the Siemens communication networks, take a look at post #5 from this thread
https://hvac-talk.com/vbb/threads/2208031-Siemens-Bacnet-Question?p=25724034#post25724034

 

Landis & GYR was established at this company back in the late 1980's. After a couple name changes with Siemens being the current company. The HVAC control system works really well if programmed correctly. I have been working with Siemens PPCL and Insight since 1990. I know there are other HVAC control systems out there but, at this point it would not make sense to switch HVAC control systems. I hope this answers your question.