Automation Information Library. Wago Coupler IP Addressing. The 750-843 Programmable coupler from Wago is typically quite capable of handling the needs of most applications, even though it is considered their "eco" (economical) coupler.
Although it handles most of the functions that the 750-841 did, there is one issue that is sure to cause some trouble: BootP. The 750-841 allowed you to set the device IP address using Ethernet Settings. the 750-843 does not support this function. Instead it is configured using a BootP server. What is BootP? The simple answer is that it is an early form of DHCP.
Wikipedia has more info, if you really want to know. For our purposes, a BootP server listens for requests, looks up the address in a text file, and assigns it to the device. Wago has a BootP server that works well with their products. Let's look at setting it up.
The first step is to get the server software. You can download it here. or get it from their website. Unzip and run the install program. When it is finished, you will see one of the selections is "WAGO BootP Server Konfiguration".
(It's German, what can I say. ) Selecting this will open a text file with a bunch of information in it. Most of what's there, you won't need or care about. Here's what you need to know:. Everything that starts with # is a comment. There are a couple lines in there that are not comments, but are examples. Go ahead and delete those lines.
You have the choice of leaving all the documentation in there or deleting that too. Take your coupler out of the box. Each coupler has some stickers on it that gives the MAC ID, or hardware address of the device. It should look something like this.
The Address we want in this case is 00:30:DE:01:AA:1B. The IP address shown is a sticker I put on my stuff to keep it all straight. Not a bad idea, for what it's worth. In order to get your new coupler assigned an address, we need three pieces of information. (1) A name for the coupler. Doesn't matter what it is, just make it unique.
(2) The hardware address we just got from the sticker. (3) The static IP address you want to give your device. The format in the Konfiguration text file is Name:type:MAC:IP:. The type is always 1.
Don't ask what that means, I don't know. It just is. Therefore, if I were to set up the coupler shown in the photo, I would put the following line in the text file.
5:. A couple things to note: I named my coupler Sample. The name has no assignment operator, it just starts the line.
Next, ht=1, this is the hardware type. The hardware address is entered with no colons, dashes, or spaces between digit groups.
Next is the IP address. Each entry in the line is separated by colons, and there has to be a colon at the end of the line. Once that is done, save the file and start the BootP Server. Press the start button and verify that it properly reads your configuration file. Make sure that you have an ethernet connection between your PC and the coupler, and power up the coupler. After a few seconds, you'll see the server acknowledge the device and assign the address. That's it.
Once it has been given the address, the coupler writes it to EEPROM. If you want to change the address, you have to go in with Ethernet Settings (using the magic cable) and set the checkbox to get a new address. Otherwise, once it's set, it's done. I hope this was helpful. If you have any questions or comments, feel free to send them to This email address is being protected from spambots.