# Modbus to Hach SC1000

**URL:** <https://forum.inductiveautomation.com/t/modbus-to-hach-sc1000/79875>\
**Category:** General Discussion\
**Created:** [September 29, 2023, 9:04pm UTC](https://forum.inductiveautomation.com/t/modbus-to-hach-sc1000/79875 "2023-09-29T21:04:24Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Jim\_Haire](https://avatars.discourse-cdn.com/v4/letter/j/9fc348/32.png) [@Jim\_Haire](https://forum.inductiveautomation.com/u/Jim_Haire)\
**Post date:** [September 29, 2023, 9:04pm UTC](https://forum.inductiveautomation.com/t/modbus-to-hach-sc1000/79875/1 "2023-09-29T21:04:24Z")

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I'm trying to bring in tags from a Hach SC1000. I have tried [Hach]HRF0 bring it in as a float, but for the value I get "bad" I tried to reverse the words in the driver. The Hach SC1000 is zero based, but I even tried one based. Can anyone help me out?

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/e/6eb47c1891e53e0d5ebf083318891e90c3446164.png)

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**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:** [September 29, 2023, 9:13pm UTC](https://forum.inductiveautomation.com/t/modbus-to-hach-sc1000/79875/2 "2023-09-29T21:13:36Z")

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Do you have any other Modbus software (modscan, modpoll, etc...) that can successfully get data as a reference?

Have you tried unit id 1 instead? i.e. `1.HRF1` instead of `HRF1`.

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<div class="post-metadata">

**Author:** ![Jim\_Haire](https://avatars.discourse-cdn.com/v4/letter/j/9fc348/32.png) [@Jim\_Haire](https://forum.inductiveautomation.com/u/Jim_Haire)\
**Post date:** [September 29, 2023, 9:38pm UTC](https://forum.inductiveautomation.com/t/modbus-to-hach-sc1000/79875/3 "2023-09-29T21:38:42Z")

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Yes I can read data with current SCADA system (DFS HT3) and yes tried all addressing types

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<div class="post-metadata">

**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:** [September 29, 2023, 9:40pm UTC](https://forum.inductiveautomation.com/t/modbus-to-hach-sc1000/79875/4 "2023-09-29T21:40:31Z")

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In the absence of any definitive documentation I suggest you get a Wireshark capture.