# Problems with Servidor OPC de Festo Fluidsim **URL:** \ **Category:** Support\ **Created:** [May 22, 2025, 6:53pm UTC](https://community.factoryio.com/t/problems-with-servidor-opc-de-festo-fluidsim/4088 "2025-05-22T18:53:56Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![jvaellosancho](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/jvaellosancho/32/876_2.png) [@jvaellosancho](https://community.factoryio.com/u/jvaellosancho)\ **Post date:** [May 22, 2025, 6:53pm UTC](https://community.factoryio.com/t/problems-with-servidor-opc-de-festo-fluidsim/4088/1 "2025-05-22T18:53:56Z")
Conecting Factory I/O with Festo OPC-UA, in the driver only apear the bytes, but not the bits. ---
**Author:** ![adriana.silva](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/adriana.silva/32/752_2.png) [@adriana.silva](https://community.factoryio.com/u/adriana.silva)\ **Post date:** [May 23, 2025, 10:02am UTC](https://community.factoryio.com/t/problems-with-servidor-opc-de-festo-fluidsim/4088/2 "2025-05-23T10:02:57Z")
Hello @jvaellosancho , welcome to the forum. It depends on the OPC server whether you can address single bits or not. Festo does not allow users to address bits; it only allows users to address bytes. To circumvent this issue, you must configure Bool items in the OPC server. Factory I/O just browses the OPC server address space and retrieves all items that pass through the filters. Unfortunately, I don’t have access to that OPC server in our labs, so I can’t investigate this further. I hope this helps. ---
**Author:** ![jvaellosancho](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/jvaellosancho/32/876_2.png) [@jvaellosancho](https://community.factoryio.com/u/jvaellosancho)\ **Post date:** [May 25, 2025, 6:54pm UTC](https://community.factoryio.com/t/problems-with-servidor-opc-de-festo-fluidsim/4088/3 "2025-05-25T18:54:50Z")
Hello. Thanks for the quickly answer. I saw many video with the same server and configuration of the Factory I/O, is of bits instead of bytes. You can finda a lot of them in youtube. What could be the reason ? Thanks in advcance / José Vaello ---
**Author:** ![brunovgr](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/brunovgr/32/12_2.png) [@brunovgr](https://community.factoryio.com/u/brunovgr)\ **Post date:** [May 26, 2025, 7:37am UTC](https://community.factoryio.com/t/problems-with-servidor-opc-de-festo-fluidsim/4088/4 "2025-05-26T07:37:50Z")
@jvaellosancho Just to better understand your case, could you let us know which FESTO software you’re trying to use with Factory I/O? ---
**Author:** ![jvaellosancho](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/jvaellosancho/32/876_2.png) [@jvaellosancho](https://community.factoryio.com/u/jvaellosancho)\ **Post date:** [May 26, 2025, 8:26am UTC](https://community.factoryio.com/t/problems-with-servidor-opc-de-festo-fluidsim/4088/5 "2025-05-26T08:26:19Z")
Hello. I am working with Festo, as a trainer. We are using the Festo EzOpc 5.8 Let me know if I can use a one better. Thanks/ José Vaello ---
**Author:** ![brunovgr](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/brunovgr/32/12_2.png) [@brunovgr](https://community.factoryio.com/u/brunovgr)\ **Post date:** [May 27, 2025, 9:27am UTC](https://community.factoryio.com/t/problems-with-servidor-opc-de-festo-fluidsim/4088/6 "2025-05-27T09:27:11Z")
@jvaellosancho Back in 2021, we collaborated with the FluidSIM team to improve compatibility between Factory I/O and FluidSIM when using OPC UA. As part of that work, we implemented automatic conversions between Factory I/O tag types (Bool, Int, Float) and the corresponding OPC UA data types. This type conversion may also allow for converting between `Byte` and `Bool`, depending on how the data is structured on the OPC UA server. You can find more details here: > **[OPC Client DA/UA - FACTORY I/O](https://docs.factoryio.com/manual/drivers/opc/#compatibility-of-opc-ua-data-types)** > > Documentation for Factory I/O If you can share a bit more about your setup or what you’re trying to achieve, I’d be happy to help further.