# Problem Connecting to WAGO 750-8212 **URL:** \ **Category:** CODESYS\ **Tags:** pfc200\ **Created:** [August 29, 2025, 8:22am UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266 "2025-08-29T08:22:29Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Mary](https://avatars.discourse-cdn.com/v4/letter/m/e99b99/32.png) [@Mary](https://www.wago.community/u/Mary)\ **Post date:** [August 29, 2025, 8:22am UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266/1 "2025-08-29T08:22:29Z")
Hi, I’m trying to connect to a WAGO 750-8212 using the WAGO DALI Configurator software. I know the controller’s IP address and I can ping it from my PC without any issues. But when I try to connect through the DALI Configurator, I keep getting the message: _“The service ‘I/O check’ might be blocked and must be enabled via the WBM.”_ I can see in the WBM that this service is already enabled. I even turned off my PC’s firewall just in case, but the problem persists. Any idea what could be causing this? ---
**Author:** ![quenorha](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/quenorha/32/429_2.png) [@quenorha](https://www.wago.community/u/quenorha)\ **Post date:** [August 29, 2025, 12:39pm UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266/2 "2025-08-29T12:39:27Z")
It’s because your PLC program is running. Try to stop your program, you should be able to use DALI Configurator. There can not be concurrent access to the DALI module. ---
**Author:** ![Mary](https://avatars.discourse-cdn.com/v4/letter/m/e99b99/32.png) [@Mary](https://www.wago.community/u/Mary)\ **Post date:** [August 29, 2025, 1:09pm UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266/3 "2025-08-29T13:09:38Z")
Thanks for the reply. I tried again after stopping the controller, but I’m still seeing the same error. Could there be another cause? I’ve also attached a photo of my setup in case the issue is related to the hardware. ![wago](https://us1.discourse-cdn.com/flex016/uploads/wago/original/2X/e/e2c7e86d6c389f4b755eb3586efcd7f0a8c094ef.jpeg) ---
**Author:** ![quenorha](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/quenorha/32/429_2.png) [@quenorha](https://www.wago.community/u/quenorha)\ **Post date:** [September 1, 2025, 5:47am UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266/4 "2025-09-01T05:47:02Z")
Does WAGO Ethernet Settings or WAGO I/O Check works ? Is your firewall enabled (in the PLC) ? Check that port 6626 is available. Are you using Codesys 2.3 ? ---
**Author:** ![Mary](https://avatars.discourse-cdn.com/v4/letter/m/e99b99/32.png) [@Mary](https://www.wago.community/u/Mary)\ **Post date:** [September 1, 2025, 2:19pm UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266/5 "2025-09-01T14:19:32Z")
Thanks, it turned out the issue was just the firewall being enabled on the PLC. Now I’m running into another problem: I can’t seem to find a DALI-2 input device in the DALI Configurator tool. Do I need to do something specific to get it detected? ---
**Author:** ![WagoIcard](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/wagoicard/32/1508_2.png) [@WagoIcard](https://www.wago.community/u/WagoIcard)\ **Post date:** [September 2, 2025, 12:36am UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266/6 "2025-09-02T00:36:08Z")
what dali-2 input device are your using ? the DALI E-LED is lit green which mean the module have found devices in the DALI network. ---
**Author:** ![Mary](https://avatars.discourse-cdn.com/v4/letter/m/e99b99/32.png) [@Mary](https://www.wago.community/u/Mary)\ **Post date:** [September 2, 2025, 7:53am UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266/7 "2025-09-02T07:53:11Z")
The DALI multimaster E-LED is showing solid green in my setup, and it was able to detect some of the control gear I have. The DALI-2 input device I’m using is a Helvar 146BD2. Do I need a different tool than the DALI Configurator to map a button to recall a scene? ---
**Author:** ![WagoIcard](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/wagoicard/32/1508_2.png) [@WagoIcard](https://www.wago.community/u/WagoIcard)\ **Post date:** [October 17, 2025, 1:57am UTC](https://www.wago.community/t/problem-connecting-to-wago-750-8212/2266/8 "2025-10-17T01:57:49Z")
At last you only need the DALI library in your program, a call to the webvisu, call the dali configuration prg and use the master FB, button FB and scene FB.