# Advance Modbus Module Issue **URL:** \ **Category:** General Discussion\ **Created:** [August 29, 2025, 6:46am UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265 "2025-08-29T06:46:05Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![rsnaik](https://avatars.discourse-cdn.com/v4/letter/r/c0e974/32.png) [@rsnaik](https://forum.inductiveautomation.com/u/rsnaik)\ **Post date:** [August 29, 2025, 6:46am UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/1 "2025-08-29T06:46:05Z")
Hello, We want to configure the Ignition system as Modbus TCP Server. We installed and configure the Advance Modbus Module. Below is config ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/8/d863f25b67040e892a9f430029784a88eb73d8a1.png) ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/5/257b295b6cfbf7c0f9c9cf7b9a9f6089fc794500.png) Device status shows connected. But we are not able to established connected with ignition using modscan running on the system with in the network. Both device can ping each other and port 502 is also open between them. Appericate any suggestion. Thanks in Advance. ---
**Author:** ![David\_Stone](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/david_stone/32/79749_2.png) [@David\_Stone](https://forum.inductiveautomation.com/u/David_Stone)\ **Post date:** [August 29, 2025, 6:54am UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/2 "2025-08-29T06:54:50Z")
I would suggest that you get in contact with Automation Professionals support, this is a commercially supported module and if you have bought a license for this module, they will be able to easily help you out. ---
**Author:** ![rsnaik](https://avatars.discourse-cdn.com/v4/letter/r/c0e974/32.png) [@rsnaik](https://forum.inductiveautomation.com/u/rsnaik)\ **Post date:** [August 29, 2025, 7:13am UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/3 "2025-08-29T07:13:07Z")
Thanks for suggestion @David_Stone . We are in POC phase so we need to verify if this solution work with Ignition. I tried contacting them but was not helpful. ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [August 29, 2025, 12:28pm UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/4 "2025-08-29T12:28:18Z")
> [@rsnaik](#): > > I tried contacting them but was not helpful. Sending me an email at midnight and calling it "not helpful" three hours later is not a good start. ☹ ---
**Author:** ![David\_Stone](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/david_stone/32/79749_2.png) [@David\_Stone](https://forum.inductiveautomation.com/u/David_Stone)\ **Post date:** [August 29, 2025, 12:35pm UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/5 "2025-08-29T12:35:44Z")
I could've sworn that AI never sleeps, you mean to tell us that you are actually mortal? ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [August 29, 2025, 12:41pm UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/6 "2025-08-29T12:41:18Z")
That said, after setting up Unit #1 to use that limited set of registers, did you click the "Start or Restart" button? Changes to units do not take effect until then. Did you check with the `netstat` utility to see if Ignition was listening on port 502? Is there a reason you skipped `1.HR0` ? This module is always zero-based. Also, show what you are attempting in ModScan. ---
**Author:** ![rsnaik](https://avatars.discourse-cdn.com/v4/letter/r/c0e974/32.png) [@rsnaik](https://forum.inductiveautomation.com/u/rsnaik)\ **Post date:** [August 29, 2025, 1:40pm UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/7 "2025-08-29T13:40:57Z")
Yes after setting up the unit we click on the start or restart button. Below is message which i recieve ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/1/814b98b7dc5853797d1844c0269c788221a0124c.png) below is the output when i run netstat on the modscan system .253 is the ignition system ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/e/fe7bfe1823d8268757eac24ae238a2a2f57b2b06.png) Below is modscan attempt ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/a/5ab3159d259ab07ce6f4eddb5f03162e0ecec779.png) Also i notice that this is the error which i am getting in the ignition log ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/4/9419ef1fc97f4423a5d10321533efe49b199b4da.png) ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [August 29, 2025, 1:55pm UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/8 "2025-08-29T13:55:07Z")
> [@rsnaik](#): > > this is the error That means something else in your gateway is bound to port 502, blocking your use of the wildcard bind address. Use the `-l` option to `netstat` to show listening ports to help you find what that other software is. ---
**Author:** ![rsnaik](https://avatars.discourse-cdn.com/v4/letter/r/c0e974/32.png) [@rsnaik](https://forum.inductiveautomation.com/u/rsnaik)\ **Post date:** [August 29, 2025, 4:16pm UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/9 "2025-08-29T16:16:50Z")
I tried this but does not give me result, I am using windows system. I also tried to restarting the system and servies no luck on that. > [@pturmel](#): > > Use the `-l` option to `netstat` to show listening ports ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [August 29, 2025, 4:23pm UTC](https://forum.inductiveautomation.com/t/advance-modbus-module-issue/110265/10 "2025-08-29T16:23:25Z")
Try `netstat -a -b` in Windows. You'll have to manually identify the **listening** sockets.