# OPC Item Path Bit Addressing with Beckhoff PLC **URL:** \ **Category:** Ignition\ **Created:** [April 29, 2022, 11:00am UTC](https://forum.inductiveautomation.com/t/opc-item-path-bit-addressing-with-beckhoff-plc/59045 "2022-04-29T11:00:55Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![user349](https://avatars.discourse-cdn.com/v4/letter/u/8e7dd6/32.png) [@user349](https://forum.inductiveautomation.com/u/user349)\ **Post date:** [April 29, 2022, 11:00am UTC](https://forum.inductiveautomation.com/t/opc-item-path-bit-addressing-with-beckhoff-plc/59045/1 "2022-04-29T11:00:55Z")
Hello. I have set up an OPC UA connection to a Beckhoff PLC and I can read/write to OPC tags. The problem is that I am unable to bit address, when I use the syntax given in the manual ( given as adding “.0” to the end of the OPC Item Path and changing tag data type to Boolean) I get “Error\_Configuration” as the tag value. Does anyone know the correct syntax to bit address to a Beckhoff PLC tag over OPC UA? Thank you ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 29, 2022, 12:22pm UTC](https://forum.inductiveautomation.com/t/opc-item-path-bit-addressing-with-beckhoff-plc/59045/2 "2022-04-29T12:22:24Z")
The syntax described in the manual is for our drivers when connected to the Ignition OPC UA server. It’s not universal with any OPC server you are connected to. If the Beckhoff server doesn’t support this syntax then you’ll have to extract bits using an expression or derived tag instead. ---
**Author:** ![user349](https://avatars.discourse-cdn.com/v4/letter/u/8e7dd6/32.png) [@user349](https://forum.inductiveautomation.com/u/user349)\ **Post date:** [April 29, 2022, 2:40pm UTC](https://forum.inductiveautomation.com/t/opc-item-path-bit-addressing-with-beckhoff-plc/59045/3 "2022-04-29T14:40:40Z")
Thank you!