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Collecting data from a PLC 1200, with an IOT 2040 and with the help of Node Red.

Created by: kampos46 at: 4/2/2022 1:46 PM (17 Replies)

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4/2/2022 1:46 PM	Rate (0)
kampos46 Member Joined: 11/8/2020 Last visit: 7/12/2022 Posts: 9 Rating: (0)	Hi, I want to do a project of collecting data from a PLC 1200, with an IOT 2040 and with the help of Node Red. I already have the programming in the PLC and using PLCSim and Node Red it works fine and I collect the data. The problem comes when the IOT intervenes. I have put the 2.6.1 image, I have configured the wifi and I have managed to start node red through putty and the web with its IP. What is the difference between starting from putty (where you see the debug messages when you make changes) and starting directly from the web without touching putty? The problem comes when trying to install any node, if I do it from putty it gives me error and if I do it from the palette on the web, it stays directly loading and does not install. When I log in from putty, the log shows this:[node-red-dashboard] Node module cannot be loaded on this version. Requires: >=1.0.0 I can't get the data from the PLC either (using PLCSim) or connecting the IOT to the PLC 1200 on the second port. I comment the IPs: PLC: 192.168.200.10 IOT:192.168.200.1 Ethernet: 192.168.200.50 In the case that I connect the IOT and the PLC on port 2, should I change the ip eth1 of the IOT in its network configuration and put 192.168.200.XXX or it is not necessary? Then I don't understand why the first time I start node-network from putty (node /usr/lib/node/node/node-network/network &) the server starts fine, but if I exit putty and enter again I get this: [error] Unable to listen on http://127.0.0.1:1880/ [error] Error: port in use Why? Let's see if someone can help me, I've been fighting with this for a long time and I can't solve it. ------------------------------------------------------------------------------------------ Split from S7 communication with node-red.
	Last edited by: kampos46 at: 04/02/2022 18:03:07 Last edited by: Jen_Moderator at: 04/04/2022 11:34:27 New subject after splitting
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4/3/2022 1:00 PM	Rate (0)
Mronia Regular Member Joined: 11/8/2021 Last visit: 4/24/2022 Posts: 24 Rating: (0)	Hi, What version od node-red and node do you have? How did you installed node red on your IoT? When I was installing additional palletes I had to reboot the IoT 2040 to use nodes.

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4/3/2022 7:42 PM	Rate (0)
kampos46 Member Joined: 11/8/2020 Last visit: 7/12/2022 Posts: 9 Rating: (0)	Mronia Hi, What version od node-red and node do you have? How did you installed node red on your IoT? When I was installing additional palletes I had to reboot the IoT 2040 to use nodes. Hello, thank you for your reply. I have finally managed to synchronize node red, iot and the plc, I already collect the data. The problem has been the version of s7 that I had in node red, which was 3.0, now with 2.1 it works. However, if I do it with PLCSim and without connecting the second port of the IOT to the PLC I can not see the data. But I still have problems when installing the rest of nodes from the web, it keeps loading and does nothing. When I install from putty I get warnings but apparently installs, but I can not see them later in the palette. What do I have to do when installing the nodes to be able to see them? Restart the IOT, how do I do it? Restart NODE-RED, how is it done? What is the solution? I still don't really know what is the difference between starting node red from putty or just opening it from the web. Then another strange thing also happens to me, many times I can't ping with www.google.com, I try instantly and it works, and the other way around, I don't really know why.

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4/3/2022 8:19 PM	Rate (0)
Mronia Regular Member Joined: 11/8/2021 Last visit: 4/24/2022 Posts: 24 Rating: (0)	Hi, When I was installing nodes on my IoT, rebooting IoT (pługging it out from power and plugging it back again) helped and I was able to see nodes on the palletes. However I was using global installation via putty. It is important to check if the node palette you want to install would run on the node-red version you have on your IoT. If I understand correctly when you run node red using putty, it deploys node red on IoT and runs the flow that is currently loaded there. When node red is running on IoT, you are able to delpoy the node red editor using <the IoT IP>:1880 command on the browser on eg your pc which should be also connected to IoT. I also had problem connecting IoT with Tia portal using plcSim advanced, there was a conflict between IP subnets which I didn't managed to solve. As workaround I am working with TiaPortal and plcSim using node red instance on my PC (I must have installed node red on my PC) and then I export created flow to IoT for further tests. I run command 127.0.0.1:1880 to open node red editor for node red instance deployed on my PC. When I am opening node red editor for IoT instance i use the IP assigned to IoT by the router, which is also the one which i use to open IoT via putty. I have router connected to internet, IoT connected to router via Ethernet cable and my PC connected to router via wi-fi. If you have IoT connected to internet you shouldn't have problems with pinging google site

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This contribution was helpful to 1 thankful Users kampos46

4/4/2022 10:19 AM	Rate (0)
bergmanu Platinum Member Joined: 4/28/2015 Last visit: 11/5/2024 Posts: 3345 Rating: (379)	Hi, there is two options to start node-red: Manually from putty (node /usr/lib/node/node-red/red &) Put node-red to autostart (iot2000setup -> Software -> Manage Autostart options) In case of 2. it is not needed to perform 1 and you can directly access node-red from web after the IOT2040 has booted. I recommend installing nodes globally from putty (npm install -g node-red-contrib-xxx), but as Mronia said, it is important to check the version for compatibility (as you did it with node-red-contrib-s7). Best regards!
	Not working for IOT2050 support anymore from March 1st, 2024. I really enjoyed the time supporting you! :)
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4/4/2022 11:13 PM	Rate (0)
kampos46 Member Joined: 11/8/2020 Last visit: 7/12/2022 Posts: 9 Rating: (0)	bergmanu Hi, there is two options to start node-red: Manually from putty (node /usr/lib/node/node-red/red &) Put node-red to autostart (iot2000setup -> Software -> Manage Autostart options) In case of 2. it is not needed to perform 1 and you can directly access node-red from web after the IOT2040 has booted. I recommend installing nodes globally from putty (npm install -g node-red-contrib-xxx), but as Mronia said, it is important to check the version for compatibility (as you did it with node-red-contrib-s7). Best regards! Hi bergmanu! this is what I get when I install dashboard, but then I am not able to see the node in the palette, even after restarting the IOT (unplugging and plugging it back into the power) How can I fix it, what is the problem? Attachment dashboard.png (981 Downloads)
	Last edited by: kampos46 at: 04/04/2022 23:13:34 Last edited by: kampos46 at: 04/04/2022 23:17:38 Last edited by: kampos46 at: 04/04/2022 23:19:09
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4/4/2022 11:17 PM	Rate (0)
kampos46 Member Joined: 11/8/2020 Last visit: 7/12/2022 Posts: 9 Rating: (0)	I also leave another picture of what I get when I start node red from putty, so you can see the versions. What I don't understand is that I can only start node red from putty the first time, if I then exit or enter first starting with the IP on the web, I get error: The port is in use. I have set start node red automatic in the settings, but I have not seen any difference and I do not really know its function, or at least I do not understand it. Attachment log.png (1097 Downloads)
	Last edited by: kampos46 at: 04/04/2022 23:19:22
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4/5/2022 7:40 AM	Rate (0)
bergmanu Platinum Member Joined: 4/28/2015 Last visit: 11/5/2024 Posts: 3345 Rating: (379)	Hi, kampos46 Hi bergmanu! this is what I get when I install dashboard, but then I am not able to see the node in the palette, even after restarting the IOT (unplugging and plugging it back into the power) How can I fix it, what is the problem? please try to use the -g flag. npm install -g node-red-dashboard Why are you trying to install those nodes? They are already pre-installed. kampos64 What I don't understand is that I can only start node red from putty the first time, if I then exit or enter first starting with the IP on the web, I get error: The port is in use. I have set start node red automatic in the settings, but I have not seen any difference and I do not really know its function, or at least I do not understand it. Maybe you are too fast with the first command starting node-red from command line. When having node-red set to autostart it takes about 5 mins after boot until node-red is started. I would recommend to power on the IOT, wait some minutes and try to access the webpage. Then there is no need to start node-red from command line. Its function is that you don't need to start the node-red every time manually, it gets started with every boot automatically. Best regards!
	Not working for IOT2050 support anymore from March 1st, 2024. I really enjoyed the time supporting you! :)
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This contribution was helpful to 1 thankful Users kampos46

4/20/2022 12:33 AM	Rate (0)
kampos46 Member Joined: 11/8/2020 Last visit: 7/12/2022 Posts: 9 Rating: (0)	Hello again, I'm still having problems, the most important is the iot2040 dashboard, I don't see the nodes in the palette despite installing them again and again, I don't know what to do. In the screenshots of previous messages I show the version of node-red and nodejs that I have and the message that I get from the dashboard node. Let's see if someone can help me please, I'm pretty desperate. Another doubt that I have and I do not know how to do, is to visualize in the TiaPortal the changes that I generate with nodered at the same time that I read the PLC data, is this possible? I am not sure, because the PLC is not directly connected to the PC, it is the port0 of the iot which is connected to the PC, and port1 to the PLC, so I do not know if it is possible. I have tried to put all the IPS 192.168.200.XXX (so much the ports of iot as the PLC, as the ethernet cable), but this way I cannot read the data of the PLC with Node-Red, so I have had to leave the ethernet and port0 of iot with 192.168.200.XXX and PLC and port1 of iot with 172.168.200.XXX, this way if I read the data. And with the PLCsim at the same time I think I can't do it because I can't open two Node-Networks with different IPs, although I have to try it again. Thank you very much for the answers

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4/20/2022 8:28 AM	Rate (0)
bergmanu Platinum Member Joined: 4/28/2015 Last visit: 11/5/2024 Posts: 3345 Rating: (379)	Hi, please use the Example Image V3.1.1. With this image the dashboard are already pre-installed and there is no need to install them. From the Node-Red version in your screenshot it seems you are using any older Example Image. The easiest way to have access to the IOT2040 and to the PLC from your PC is using a switch. Connect your PC, X1 of IOT2040 and the PLC to this switch and set all devices in subnet 192.168.200.xxx. When using a S7-1215 or S7-1217 you can use the two ports of the PLC as a switch. Connect the PC to one of the ports and the IOT2040 to the other port. In this case also all devices have an IP address in subnet 192.168.200.xxx. Best regards!
	Not working for IOT2050 support anymore from March 1st, 2024. I really enjoyed the time supporting you! :)
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