# Contrib S7 error

**URL:** <https://discourse.nodered.org/t/contrib-s7-error/97347>\
**Category:** General\
**Created:** [31 May 2025 00:32 UTC](https://discourse.nodered.org/t/contrib-s7-error/97347 "2025-05-31T00:32:32Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [31 May 2025 15:08 UTC](https://discourse.nodered.org/t/contrib-s7-error/97347/3 "2025-05-31T15:08:06Z")

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Hi @CobyCoffee - welcome to the forum 🙂

> [@CobyCoffee](#):
>
> Error: PLC error [0x8104]: This service is not implemented on the module or a frame error was reported

Searching this ☝on google reveals a fair few hits including:

- [Contrib-s7 error when adding variables](https://discourse.nodered.org/t/contrib-s7-error-when-adding-variables/36480)
- [https://lists.apache.org/thread/qk3ln5xp68r12q3rv76p949s4f6gk2sm](https://lists.apache.org/thread/qk3ln5xp68r12q3rv76p949s4f6gk2sm)
- [https://youtu.be/rTUs-\_EiZ3A?t=40](https://youtu.be/rTUs-_EiZ3A?t=40)
- and many more

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_[View the full topic](https://discourse.nodered.org/t/contrib-s7-error/97347)._