# EtherCat with 750-653 and Elsner Weatherstation P03

**URL:** <https://www.wago.community/t/ethercat-with-750-653-and-elsner-weatherstation-p03/1248>\
**Category:** CODESYS\
**Tags:** how-to\
**Created:** [October 11, 2024, 2:28pm UTC](https://www.wago.community/t/ethercat-with-750-653-and-elsner-weatherstation-p03/1248 "2024-10-11T14:28:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MaLie](https://avatars.discourse-cdn.com/v4/letter/m/cc9497/32.png) [@MaLie](https://www.wago.community/u/MaLie)\
**Post date:** [October 11, 2024, 2:28pm UTC](https://www.wago.community/t/ethercat-with-750-653-and-elsner-weatherstation-p03/1248/1 "2024-10-11T14:28:10Z")

</div>

Hello folks,

first communication between 750-653 and Weatherstation work so far with an plc 750-841.  
I have to change the system to CoDeSys 3.5 and want to reach the Weatherstation over EtherCat Module 750-354 with a 750-653 module.  
I got the FbModule\_75x\_653 from WagoSysFieldbusModule, unfortunately, the documentation says nothing about the connection from module to functionblock, maybe i miss something.

> Step 2  
> Bind the module to an Fieldbus Process Image
> 
> ```auto
> VAR_GLOBAL
> abReadData : ARRAY[0..126] OF BYTE;
> abWriteData : ARRAY[0..126] OF BYTE;
> END_VAR
> 
> IF xUpdatFieldbusData THEN (* set the new inputs for our module
> and get the new outputs from our module
> to write to the fieldbus synchronized to the fieldbus cycle
> *)
> myModule653.SetNewPaInputs (ADR(abReadData[0]) , myModule653.PA_SIZE_INPUT);
> myModule653.GetNewPaOutputs(ADR(abWriteData[0]), myModule653.PA_SIZE_OUTPUT);
> 
> END_IF
> 
> ```
> 
> How to connect the abReadData/abWriteData to the module?

I found some similar cases but only confusing me more.  
Some without the `xUpdateFieldbusData` and some which put the arrays without a field in the fb.

thanks for help.

Max

 ![Bildschirmfoto vom 2024-10-11 16-27-23](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/581c3c974525485ddc6063fe061f7a453bc3e3b2.png)