Reading out Landis Gyr E650

By Thomas_VDB , 18 October, 2022

Forums

Hi,

I am sorry to hijack this forum, as I want to read out this energy meter, but I am not using DLMSDirector.
I read that there is much knowledge in this forum regarding the mentioned energy meter.

We have a Landis Gyr E650, with a CU-L52 communication module fitted.

I noticed this has an RS485 socket.
I have much experience with RS485 and modbus.

So I want to read out this energy meter using my program language (labview).
Does anybody have som e tips on how to start?
Do I just connect my USB RS485 adapter, and start polling via Modbus RTU?
Do I need to configure some things first? What are the default baudrates, parity,...
Does this link have the correct Modbus addresses?
https://www.aggsoft.com/serial-data-logger/tutorials/modbus-data-loggin…
I noticed that there is a modbus address offset comparing to this list :
https://shop.marcomweb.it/images/stories/virtuemart/product/USER_MANUAL…

The CU-L52 is currently being used for LTE/4G communication. Can I use the RS485 interface completely separated from the LTE/4G communication?

I just want to poll kWh and actual kW every 30s or so.
Power factor/cosin phi would be nice.

Thanks for the tips!
Thomas.

Hi Thomas,

To my knowledge, CU-L52 doesn't support Modbus. It's only supporting DLMS. You need to verify this from the meter vendor.

I believe that you need to use DLMS to read data from the meter. DLMS is more complicated than DLMS. There are some advantages (different interface can offer more information) and some disadvantages (DLMS is more complicated than Modbus).

There is an example for the labview. It will establish the connection for the meter and read all the values from the meter. I hope it will help you to read the register values from the meter.

https://github.com/Gurux/GuruxDLMS.c/tree/master/National%20Instruments…

I propose that you download GXDLMSDirector and play with it first. It will help you to get an idea of the DLMS meters.

BR,
Mikko

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Hi Thomas,