12/3/2022 2:48 PM | |
Joined: 1/5/2012 Last visit: 4/1/2024 Posts: 22 Rating: (0) |
Greetings, I have been working for several days to get 2 way communication using the T-blocks to communicate with Node Red. Im using an S7-1212 on the PLC side and node red on the PC side. So far I can get the connection and send "hello world" to Node Red. Where I fall down is on the receiving side of the 1212. No matter what I try, I cannot receive data from node red. I have even tried replacing the node red PC with another 1212 and still have the same problem of not receiving data. Ive tried it with using TCON, TSEND, and TRCV. The project attached here is trying with TRCV_C and TSEND_C. In both examples it seems as if the "TCON" part of the receive side is not working correctly. I have the TSEND_C setup as an active connection and the TRCV_C as passive. On the Node red side the flow is very simple. A TCP in -> Debug node. A "inject" to a TCP out node The inbound listens on port 3000, the outbound goes to 192.168.30.20:3000. It almost seems as if Im hitting some sort of firewall in the 1212. The only other thing of note is that I have tried MQTT and that works both ways. However my application will require open TCP and MQTT is not an option at this time. I sure hope somebody out there can tell me what Im doing wrong. Attachmentbench 1200 tcp 0.3 t-c.zip (392 Downloads) |
12/5/2022 6:49 AM | |
Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8175 Rating: (172) |
Closed cause question posted twice. The second thread with the subject S7-1200 Open TCP problem (TCON) is published within the conference Communication / Networks. Jen_Moderator |
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