# eCockpit connection Modbass

**URL:** <https://www.wago.community/t/ecockpit-connection-modbass/927>\
**Category:** CODESYS\
**Created:** [May 6, 2024, 3:50pm UTC](https://www.wago.community/t/ecockpit-connection-modbass/927 "2024-05-06T15:50:16Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![TomasD](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/tomasd/32/2042_2.png) [@TomasD](https://www.wago.community/u/TomasD)\
**Post date:** [May 6, 2024, 3:50pm UTC](https://www.wago.community/t/ecockpit-connection-modbass/927/1 "2024-05-06T15:50:16Z")

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I came across this problem. Connected modbus RTU to COM1. The connection drops out periodically. But then it recovers. What could be the problem?  
 ![2024-05-06_18-43-18](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/9dff20de6aa7f81718aabd3b1e772450df5ffcaf.png)

 ![2024-05-06_18-41-38](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/e5fd0e07663d9a028243dcbd19e28501dc5330d2.png)  
 ![2024-05-06_18-41-14](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/4289b93113f334467ccecc968fdbbe91397f58e7.png)  
What settings can cause such problems?

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<div class="post-metadata">

**Author:** ![TomasD](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/tomasd/32/2042_2.png) [@TomasD](https://www.wago.community/u/TomasD)\
**Post date:** [May 8, 2024, 9:32am UTC](https://www.wago.community/t/ecockpit-connection-modbass/927/2 "2024-05-08T09:32:03Z")

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Is it possible to view the bytes coming to the bus? How can you check which bytes are leaving?

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**Author:** ![WagoIcard](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/wagoicard/32/1508_2.png) [@WagoIcard](https://www.wago.community/u/WagoIcard)\
**Post date:** [May 8, 2024, 11:49pm UTC](https://www.wago.community/t/ecockpit-connection-modbass/927/3 "2024-05-08T23:49:11Z")

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hello you need to have a serial sniffer.  
i’ve repurposed an old rPI2b for it.

another way would be to use a USB to RS adapter and a Windows / Linux PC …

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<div class="post-metadata">

**Author:** ![TomasD](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/tomasd/32/2042_2.png) [@TomasD](https://www.wago.community/u/TomasD)\
**Post date:** [May 13, 2024, 8:41am UTC](https://www.wago.community/t/ecockpit-connection-modbass/927/4 "2024-05-13T08:41:15Z")

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Through the MOXA adapter the SLAVE device works perfectly. The problem is only when Wago is the Master and polls the Slave.  
I wanted to see what bytes come in the request, but I understand that such a function is not provided?