VDV 461 (SIRI/VDV461 BMS Interface)
Standardized interface for exchanging operational and dispatch-relevant data between an ITCS and a depot management system (BMS) using SIRI-based services.
Technical Details
VDV 461 structures the ITCS ↔ BMS integration into services such as LLR (log-on/log-off/reassignment), DAP (depot arrival predictions), CM (coded messages), and CIT (cyclic information transfer). It uses a subscription/polling pattern with messages like CheckStatusRequest/Response, SubscriptionRequest/Response, DataReadyNotification/Acknowledgement, and DataSupplyRequest/ServiceDelivery, and also supports a “Rückkanal” for instruction messages (e.g., parking bay assignments) with configurable acknowledgement behavior.
Fleet Applications
Enables depot automation by providing early visibility into inbound vehicles (arrival predictions), exchanging coded operational signals, and supporting workflows like assigning parking/charging bays and communicating instructions back to drivers and vehicles.
Related Terms
CSMS (Charging Station Management System)
Software platform used to monitor, manage, and optimize a network of EV charging stations.
Depot Charging
Charging infrastructure located at a central facility where fleet vehicles return to park and charge, typically overnight.
VDV 452 (Public Transport Data Model)
VDV-Schrift 452 defines the German public-transport data model (ÖPNV-Datenmodell) used as a consistent semantic basis for databases and interfaces across public transport IT systems.
Depot Arrival Prediction (VDV 461 DAP)
A VDV 461 service that transmits predicted depot arrival times and related context from ITCS to the depot management system (BMS).
Instruction Notification (VDV 461 Rückkanal)
A VDV 461 mechanism for sending instructions (e.g., parking bay assignment) from the depot management system to ITCS and onward to drivers/vehicles.
VDV 463 (Charging Management Interface)
Standardized interface for data exchange between depot/ITCS “pre-systems” and charging management, so charging and preconditioning can be planned and synchronized for e-bus depots.