# Pac3200 Pac 2200 Sentron read 4registers \[ 64 bits\]

**URL:** <https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591>\
**Category:** Industrial\
**Created:** [21 April 2022 10:04 UTC](https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591 "2022-04-21T10:04:51Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Pierre72](https://avatars.discourse-cdn.com/v4/letter/p/b2d939/32.png) [@Pierre72](https://discourse.nodered.org/u/Pierre72)\
**Post date:** [21 April 2022 10:04 UTC](https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591/1 "2022-04-21T10:04:51Z")

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Hello,

I'm looking for the final solution for reading the 801 offset of a Siemens Sentron PAC 2200.

I saw post but closed since 2020: [Pac3200 read 4registers [64 bits]](https://discourse.nodered.org/t/pac3200-read-4registers-64-bits/32416)

and

> [@ModBus TCP Read 32-bit registers](https://discourse.nodered.org/t/modbus-tcp-read-32-bit-registers/1710/21):
>
> I am using a Siemens PAC 2200 device that reads information from the mains such as voltage, current, etc. The manual for this device tells you the registers sent by MODBUS, some of them Float type and some Double type. Float-type ones I can read quietly. But the Double type I can not. Following are some images to better exemplify. [nodered] [PAC2200] The nod-red image I get an array of 4 values, and I need to turn this value into real information, as you can see in the other fig…

My payload is :

[16663,26345,228,12528]

How did you configure Buffer Parser?

node-red-contrib-buffer-parser

I am looking for this value:

Energy compteur / Total import : 383.45-KWh

My Modbus request 🙂  
 ![Capture d’écran de 2022-04-21 11-51-28](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/7/2/722f1add1682e49542faf266c8ff6290696ac245.png)

In the Siemens documentation

 ![Capture d’écran de 2022-04-21 11-54-34](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/3/2371883297d191cd8a37ecbbd246433383126dcc.png)

Thank you in advance for your assistance

Pierre

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**Author:** ![MrLight](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/mrlight/32/60381_2.png) [@MrLight](https://discourse.nodered.org/u/MrLight)\
**Post date:** [21 April 2022 10:53 UTC](https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591/2 "2022-04-21T10:53:04Z")

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I'm using Modbus Flex Getter Node for Modbus communication.  
When I read the 801.. registers I send the following request to the PAC

{  
"fc": 3,  
"unitid": 1,  
"address": 801,  
"quantity": 40  
}  
The buffer-parser looks like this:

 ![Screenshot 2022-04-21 125110](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/0/b/0ba117d982e38bea0e2f3b5baa23f6d006eb6fb9.png)

With a resulting payload of: 10 double values...

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**Author:** ![Pierre72](https://avatars.discourse-cdn.com/v4/letter/p/b2d939/32.png) [@Pierre72](https://discourse.nodered.org/u/Pierre72)\
**Post date:** [24 April 2022 10:17 UTC](https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591/3 "2022-04-24T10:17:38Z")

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Hello MrLight,

Thanks, it works perfectly 🙂

Good Sunday.

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**Author:** ![NicoloToscani](https://avatars.discourse-cdn.com/v4/letter/n/f19dbf/32.png) [@NicoloToscani](https://discourse.nodered.org/u/NicoloToscani)\
**Post date:** [7 May 2022 09:12 UTC](https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591/4 "2022-05-07T09:12:42Z")

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Hi Pierre,

I developed this node to simplify communication with the SENTRON series:

# node-red-contrib-siemens-sentron

Can you test with your PAC3200 ?

Nicolò

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<div class="post-metadata">

**Author:** ![Pierre72](https://avatars.discourse-cdn.com/v4/letter/p/b2d939/32.png) [@Pierre72](https://discourse.nodered.org/u/Pierre72)\
**Post date:** [7 May 2022 14:46 UTC](https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591/5 "2022-05-07T14:46:28Z")

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Hello Nicolo,

I'm using a Sentron PAC 2200.

I had tested your node but in did not work with the index (active energy import).

If you have made changes, I can test and give you feedback if you want ???

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**Author:** ![NicoloToscani](https://avatars.discourse-cdn.com/v4/letter/n/f19dbf/32.png) [@NicoloToscani](https://discourse.nodered.org/u/NicoloToscani)\
**Post date:** [8 May 2022 11:57 UTC](https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591/6 "2022-05-08T11:57:42Z")

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Hi,

I'm try to fixing format for double values.  
Can you try new version of the node with PAC2200 and give me a feedback?

Thanks

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [7 July 2022 11:58 UTC](https://discourse.nodered.org/t/pac3200-pac-2200-sentron-read-4registers-64-bits/61591/7 "2022-07-07T11:58:18Z")

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