# Modicon TSX57 connection via ModbusTCP or Unitelway **URL:** \ **Category:** Ignition\ **Created:** [June 30, 2023, 10:34am UTC](https://forum.inductiveautomation.com/t/modicon-tsx57-connection-via-modbustcp-or-unitelway/75764 "2023-06-30T10:34:20Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Marc.Akoto](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/marc.akoto/32/19291_2.png) [@Marc.Akoto](https://forum.inductiveautomation.com/u/Marc.Akoto)\ **Post date:** [June 30, 2023, 10:34am UTC](https://forum.inductiveautomation.com/t/modicon-tsx57-connection-via-modbustcp-or-unitelway/75764/1 "2023-06-30T10:34:20Z")
Hi, I'm trying to connect Ignition's Modbus driver to a legacy Modicon PLC : - reference is TSX 57203 from Schneider Electric, - equipped with an ETY 110 communication module (see details below) In the PLC program I noticed that the Data Link Layer is set to **802.3** instead of _Ethernet_. - Does Ignition support 802.3 communication for its Modbus TCP driver ? - Any idea whether I should use a 3rd party driver in order to interface Ignition to this Modicon PLC ? ![communication settings](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/e/ee2524838ec12731e45c55e5c18aaf330abf72b3.png) ![TCP-IP communication options for TSX57](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/3/b35893837bdf6c566eee637c813a332322f5e3b5.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:** [June 30, 2023, 11:49am UTC](https://forum.inductiveautomation.com/t/modicon-tsx57-connection-via-modbustcp-or-unitelway/75764/2 "2023-06-30T11:49:32Z")
802.3 is modern Ethernet. Ethernet II is some ancient variant that didn't catch on, IIRC. Ignition (and the Modbus protocol in general) doesn't care about layer 2, just layers 3 & 4 (Internet Protocol and Transmission Control Protocol). ---
**Author:** ![Marc.Akoto](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/marc.akoto/32/19291_2.png) [@Marc.Akoto](https://forum.inductiveautomation.com/u/Marc.Akoto)\ **Post date:** [July 3, 2023, 2:54pm UTC](https://forum.inductiveautomation.com/t/modicon-tsx57-connection-via-modbustcp-or-unitelway/75764/3 "2023-07-03T14:54:42Z")
Thanks @pturmel for the clarification on 802.3 I noticed that the real struggle with my TSX device is that it can't mix both Modicon protocols (Unitelway + Modbus) on the same port. Currently it's configured to answer only to Unitelway requests, as you can see on the screenshot. Therefore Modbus driver won't get connected to it. - Is there an option with Ignition to send Unitelway requests ? - Or should I use a 3rd-party driver ? ---
**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:** [July 3, 2023, 3:08pm UTC](https://forum.inductiveautomation.com/t/modicon-tsx57-connection-via-modbustcp-or-unitelway/75764/4 "2023-07-03T15:08:51Z")
Probably need a 3rd-party driver. I've never heard of Unitelway. 🤷‍♂️ ---
**Author:** ![Marc.Akoto](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/marc.akoto/32/19291_2.png) [@Marc.Akoto](https://forum.inductiveautomation.com/u/Marc.Akoto)\ **Post date:** [July 3, 2023, 4:02pm UTC](https://forum.inductiveautomation.com/t/modicon-tsx57-connection-via-modbustcp-or-unitelway/75764/5 "2023-07-03T16:02:35Z")
Not surprising for such a rare protocol. For Modbus, there might be an option to declare manually a Modbus chanel open to my SCADA IP. That means adding one line to the network settings of the PLC. I'll elaborate on that, and share the update. ![add_modbus](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/f/0ff49f656bed5d034490c136ab6bd61c5f0abac1.png)