FAQ

FAQ

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We would like to offer our customers the possibility to read smart meters via wireless interface. Is there some kind of software development kit we could use for this purpose, or can we find all the relevant information in the existing standards?

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Wireless reading still includes hardware, in particular the receiver, followed by the gateway, for instance to the Internet. The OMS specification describes the communication between the measuring device and the receiver/gateway. It does not include the communication beyond the gateway. In Germany, the Federal Office for Information Security (BSI) has described the requirements for these further areas in the Technical Guidelines TR-03109, which are, however, only mandatory for electricity and gas. If you do not want to build your own gateway, I recommend the gateways by OMS members, which you can find on our homepage.

What is the difference between OMS 2.0 and OMS 3.0?

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The most significant change is that synchronous transmission is supported by the Generation 3 release. This supports the reception with battery-powered meters. Generation 2 meters need a mains-supplied receiver. In addition, various small improvements and bug fixes have been implemented.

Is there a solution for reading heat meters from various manufacturers, which supports walk-by meter reading on a Windows laptop with a Wireless Meter Bus radio module via USB/Bluetooth?

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The OMS specification also covers walk-by systems. Some manufacturers develop a custom solution. Additionally, off-the-shelf systems are available. These should be able to cover measuring devices for all energy segments.

Can two OMS devices from different manufacturers communicate with each other, if both use the OMS specification, but also use proprietary commands?

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The OMS-Group has developed an interoperable system and a test procedure to ensure the communication between devices from different manufacturers by a standardized protocol.

Are OMS versions backward compatible?

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At OMS-Group, we speak of generations of the specifications. Two charts at the end of the publication “Das OMS-Generationenkonzept” give an overview of the downward compatibility of OMS generations. An English version will be available soon.

Is it possible to perform a pre-test to determine if my product will pass OMS certification?

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You can order the OMS test tool by sending us the order form, which you can find here on the OMS-Group website. Non-members can also order the test tool. A new version of the test tool will be available soon. As soon as the new version is released, you can update your older version of the test tool.

How can I join the OMS-Group?

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We are happy to welcome new members in the continuously growing OMS community. You will find all details on the OMS website, such as the membership form, and information on the annual membership fee and the registration fee, which varies depending on the size of your company.

Which certification bodies test and certify compliance with the OMS specification?

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Currently DVGW CERT, the largest gas and water certification authority in Europe, is the only certifier that tests and certifies OMS products (www.dvgw-cert.com). esting and certification is conducted by the DVGW test laboratory at the Engler Bunte Institute of the KIT Karlsruhe Institute of Technology (www.dvgw-ebi.de/forschungsstelle.htm).

How can you identify the manufacturer ID of an OMS product?

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The manufacturer ID is transmitted with each message. The position of the vendor ID of an OMS product is described in OMS specification Volume 2.

Download the specification
The supplier identification code is specified by DLMS:

Link to DLMS website

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FAQ (Frequently Asked Questions)

This area is under construction and will be gradually filled with the most frequently asked questions and their answers. If you have any questions, please email us, we will reply as soon as possible.

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