How many PLCs can be connected? - Printable Version +- Hilscher Community Forum (https://forum.hilscher.com) +-- Forum: netPI 3 - Docker featuring Industrial Raspberry Pi 3 platform (https://forum.hilscher.com/forum-1.html) +--- Forum: Hardware (https://forum.hilscher.com/forum-4.html) +--- Thread: How many PLCs can be connected? (/thread-670.html) |
How many PLCs can be connected? - Lingyue - December-14th-2020 Dear Armin, I have some questions about netPI or NIOT-TPI51-EN-RE as Profinet or other RTE network slave. 1. Is there a one-to-one relationship or a one-to-many relationship between the netIOT Edge Gateway and the master PLC? 2. If there is Siemens S7 PLC and supports MPI interface, need to use a MPI-Adapter to convert MPI to Ethernet, and then connect netPI or NIOT-TPI51-EN-RE, in Node-RED use s7comm node configuration. Now, the MPI-Adapter can connect many PLC? How to configurate through s7comm node? This application scenarios please check the attachment. Looking forward to your reply.
Best regards
Lingyue
RE: How many PLCs can be connected? - Armin@netPI - December-14th-2020 Well, netPI and NIOT-E-TPI51 device both support netX51 industrial network controller featuring the 2x RJ45 LAN port interface In general the netX51 chip can be set to
With NIOT-E-TPI51 this is different. Node-RED PROFINET and TCP/IP support are installed natively on the system and not containers. This means mode 1 and mode 2 can be used a the same time. Node-RED PROFINET gets its PROFINET IP address assigned automatically by PLC over PROFINET and the second TCP/IP address you configure youtself in the web UI under network settings for interface "cifx0". Now back to your question. Which of these modes do you want to use? I analysed your picture well, but I was not able to understand which mode you want to use finally. I see your blue network line and remark LAN / TCP/IP, so I suppose you want to use mode 2 only, right? 1. This question depends on mode 1 or 2. With mode 1 PROFINET it is always a 1:1. With mode 2 TCP/IP it is 1 : many, since you can use multiple s7comm nodes in Node-RED at the same time each using a different IP address to address multiple PLC over TCP/IP 2. In general a NL 50-MPI Ethernet to MPI/PROFIBUS adapter can address multiple PLCs at the same time while adapter has only a single IP address. To address subordinate multiple MPI/PROFIBUS PLCs have MPI/PROFIBUS address 2, 3 ,4 ... you have to follow the "rack" and "slot" scheme that is additional parameter of s7comm node or better said NL 50-MPI addressing scheme. The NL 50-MPI addressing scheme is explained in Hilscher's knowledge base here https://kb.hilscher.com/x/qKmKAQ Thx Armin RE: How many PLCs can be connected? - Lingyue - December-14th-2020 Dear Armin, Thanks a lot for your reply. Now I want to choose the mode1, means the netPI or NIOT-E-TPI51 as PROFINET device to exchange data over PROFINET protocol. So, it is always a 1:1 relationship between netIOT Edge Gateway and PLC Master, is it correct? Best regards Lingyue RE: How many PLCs can be connected? - Armin@netPI - December-14th-2020 In general a PROFINET device is assigned to a single PROFINET controller PLC. So it is always a 1:1 relations ship in the view of the device. But of course a PROFINET controller whereas can communcate to multiple devices the same time. Only PROFINET devices which support controller redundancy support communication in fail over to two PROFINET controller as illustrated here: https://profinetuniversity.com/system-redundancy/profinet-controller-redundancy/. But neither netPI nor NIOT-E-TPI support PROFINET controller redundancy. Thx Armin RE: How many PLCs can be connected? - Lingyue - December-15th-2020 Dear Armin, Thanks for your reply and explaination very much. I have a clearly understand about this question. Best regards Lingyue |