Change of Origin

Overview

When a train is due to start from a location other than the first location in the schedule, a change of origin message will be sent.

Trains may start from alternate locations for two reasons:

• When the previous working is terminated short of its destination and the return working will start from that location
• When the train starts from, for example, Doncaster North Yard rather than the schedule location of Doncaster South Yard

Data structure

Header

Field	Description
msg_type	Set to '0006' for an change of origin message
source_dev_id	Set to the ID of the device that issued the change of origin message
source_system_id	Set to "TRUST" for a change of origin message
original_data_source	Set to "TRUST DA" or "SDR" for a change of origin message

Body

Field	Description
train_id	The 10-character unique identity for this train at TRUST activation time
dep_timestamp	The planned departure time at the location where the train is being reinstated
original_loc_stanox	If the location has been revised, e.g. the new origin is 'out of plan' for the train, the STANOX of location in the schedule at activation
original_loc_timestamp	The planned departure time associated with the original location
current_train_id	Always blank
train_service_code	Train service code as per schedule
reason_code	The reason code for the cancellation, taken from the Delay Attribution Guide
division_code	Operating company ID as per TOC Codes
toc_id	Operating company ID as per TOC Codes
train_file_address	The TOPS train file address, if applicable