MP131 Default maximum demand configuration conflict

Proposer Chun Chen
Lead Analyst Bradley Baker
Date raised 21/05/2020
Implementation date 29 November 2020
Latest update This modification was implemented on 29 November 2020 as part of the November 2020 SEC Release.

What is the issue?

According to SMETS, GBCS use case definition, DUIS and MMC, values of week definition and date range cannot be configured, for example only the time of day can be configured via defined use case.
The Companion Specification for Energy Metering (COSEM) template (attached in GBCS Section 18.2 (use case ECS37)) also shows the date configuration for the maximum demand as below:

Maximum demand monitoring is daily in between configured time of day for its whole life.
1. Value of week day is 0xFE
2. Value of begin date is 0x000001FFFF
3. Value of end date of 0xFFFFFFFFFF

This means that as result of SECMP0018’s implementation, GBCS Table 28d is in conflict with ENA-required default configuration and SMETS, GBCS use case, DUIS and MMC.
It is proposed that a correction is made to GBCS v3.2 Table 28d to align with ENA-required default configuration.

What is the solution?

The Proposed Solution is to make amendments to GBCS Table 28d. A number of values currently found in this table conflict with what is stated in the SMETS, GBCS use case definitions, the DUIS, the MMC and the COSEM. The Proposed Solution is to amend the table so that the current conflicting values are corrected to align with the other Technical Specifications. This will mean that, once implemented, meter Manufacturers will be able to build Devices that comply with the Technical Specifications, removing any confusion as to which Technical Specification to follow.

Who is impacted?

Large Suppliers
Small Suppliers
Electricity Network Parties
Other SEC Parties

What SEC documents are affected?

SEC Schedule 8 'GB Companion Specification'

Modification documents

MP131 Conclusions Report
MP131 Modification Report Consultation
MP131 legal text
MP131 Modification Report
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