$95 HD/LINKer - Invensys Rail

VIRTUAL LINE CIRCUITS
8.2 ATCS ADDRESSING
All in-service HD/LINK vital I/O modules are identified by a standardized addressing scheme,
consisting of fourteen digits in the following format: 7.RRR.LLL.GGG.SS.DD where:
7 = Wayside equipment
RRR = Railroad number
LLL = Line number
GGG = Group number
SS = Subnode or Module number
DD = Device number
The RRR fields represent the railroad number assigned by ATCS Specification 250. See Appendix E
for a list of Railway carriers.
The LLL fields represent the Line number within the Railroad. The LLL fields are normally assigned
by each railroad according to internal conventions.
The GGG fields represent the Group (location) number within the Line. The GGG fields are normally
assigned by each railroad according to internal conventions.
The SS fields represent the numbers assigned to the Group’s modules. By default, two numbers are
always pre-assigned at each location. Number 01 is reserved for the wayside-to-office
communications device. Number 02 is reserved for the SSR. I/O module numbers are allocated in
sequence beginning at 03.
The DD fields represent the numbers assigned to a communications component (see paragraph
8.3.1). By default, one number is always pre-assigned at each component. Number 01 is reserved
for the I/O Manager of the HD/LINKer executive software. Other components are allocated in
sequence beginning at 02.
Document No.: SIG-00-97-08 Version: C
8-2