Sentron PAC3120 Modbus Energy Registers

Hi,

We are integrating some Sentron PAC 3120 and 3220 energy meters with one BMS software. This BMS software cant use Double registers, just float registers.

These meters are a replacement for PAC3100 meters that his energy registers  are float (actually originally, the energy registers were double, and due to this issue Siemens publish a new firmware that adds float energy registers).

So, I was wondering if there any way to integrate this meters to our BMS.

Attached is one screenshot of the PAC3100 energy registers.

Thank you so much in advance for your help!

Mario

Hi,

Can you provide some details please for the BMS controller that you are using?

The info you attach looks like the registers are 64bit (made up of 4x 16bit values). If the device does not support 64bit registers, are you able to read the 4x 16bit registers? There are some calculations that you can add to the program to take the 4x 16bit registers, and make them into a single value.

Regards,

H,

Maybe this answer is late.

You can use PAC3120 float (32-bit) registers 2801 and 2805 for active and reactive energy (because this is two-tariff meter and register map slightly differs from PAC3100) or if you can read double float values (64-bit), you can read 801 and 809.