HomeRulebook HomeBalancing and Settlement CodeGuidance NotesCentral Management System Equivalent Meter Tes...
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CONTENTS

  • Purpose
  • 1. Introduction
    • 1.1 Scope
    • 1.2 Approval Process
  • 2. Understanding CMS Terminology
    • 2.1 What is the difference between a Central Management System and a measured Central Management System (mCMS)?
    • 2.2 What are Unmetered Supplies under the BSC?
    • 2.3 What is the Unmetered Supplies Operator (UMSO)?
    • 2.4 What is a detailed inventory?
    • 2.5 What is a Meter Administrator (MA)?
    • 2.6 What is an Unmetered Supplies Data Service (UMSDS)?
    • 2.7 What is a CMS Test Agent?
    • 2.8 What are Charge Codes?
    • 2.9 What is a CMS Controller Charge Code?
    • 2.10 What are Switch Regimes?
    • 2.11 What is an Equivalent Meter (EM)?
    • 2.12 What is a Sub-Meter?
    • 2.13 What is a CMS Unit Reference?
    • 2.14 What is a Control File?
    • 2.15 What is an Event Log?
    • 2.16 What is Event Log Version control?
    • 2.17 How is percentage power reported in an Event Log?
  • 3 Test Approach, Environment and Data Requirements
  • 4 Key Test Scenarios for Central Management Systems
    • 4.1 Test Scenarios for Central Management Systems used to control lighting
      • 4.1.1 Scenario 1 – Switch Regime 999
      • 4.1.2 Scenario 2 – Switch Regime 998
      • 4.1.3 Scenario 3 – Control Failure for Multiple CMS Unit References
      • 4.1.4 Scenario 4 – Revised Data after Control Failure (following day)
    • 4.2 Test Scenarios for measured Central Management Systems
      • 4.2.1 Scenario 1 – On and Off test
      • 4.2.2 Scenario 2 – Two Events with Disconnection in Between
      • 4.2.3 Scenario 3 – No Connection, No Consumption
      • 4.2.4 Scenario 4 – Connection, No Consumption
      • 4.2.5 Scenario 5 – Consumption Over Midnight
      • 4.2.6 Scenario 6 – Communications Failure
  • 5. Requirements Test Checklist
    • 5.1 System Requirements
    • 5.2 Data Input and Storage Requirements
    • 5.3 Process Requirements
    • 5.4 Data Output Requirements
  • 6. Test Group Summary
  • 7. Recording Test Results
    • Appendix A – Terms used in this Document
    • Need more information?

Central Management System Equivalent Meter Test Specification V10.0

Effective From Date:26/05/2025
Status:LIVE
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