User`s guide

22 DC 900-1317J
ADCCP NRM Programmer’s Guide
To maintain high data throughput, Freeway uses a multi-processor architecture to sup-
port the LAN and WAN services. The LAN interface is managed by a single-board com-
puter, called the server processor. It uses a commercially available BSD Unix operating
system (VxWorks on some older systems) to provide a full-featured base for the LAN
interface and layered services needed by Freeway.
Freeway can be configured with multiple WAN interface processor boards, each of
which is a Protogate ICP. Each ICP runs the communication protocol software using
Protogate’s real-time operating system.
Figure 1–1: Freeway Configuration
WAN
Interface
Processors
Freeway
Ethernet LAN
● ● ●
ICP
ICP
3413
Client n
Application
WAN Protocol
Options
●
● ●
Industry Standard Bus
Client 2
Application
API
API
Server Software
Client 1
Application
DLI
API
DLI DLI
Commercial
Financial
Government
Military
S C A D A