Outline, Outline -1 – Yokogawa GC1000 Mark II Process Gas Chromatograph User Manual

Page 8

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<1. Outline>

1-1

IM 11B06E01-01E

1. Outline

ASGW is software which serves as a gateway in the Ethernet analyzer bus system to enhance

communication between the GC8000, GC1000 MarkII or ASIU (hereafter called “analyzer”) and

DCS. FCJ is used as its hardware component.
ASGW controls the Modbus protocol communication between multiple analyzers and DCS and

improves engineering efficiency and communication performance.
ASGW has two type interfaces: Modbus TCP Ethernet one port and Modbus RTU serial.
Modbus mapping is realized with address table and programming is not necessary.
FCJ is described as ASGW is in this document.

DI/O

RS-232C

Ethernet

PC

[PCAS]

PC

[ASET]

STARDOM FCJ

[ASGW]

GC1000 MarkII

Analyzer Server

[Network management,

Auto save]

Gateway Unit

[Exchange data with

the host systems]

Engineering Terminal

[Display of operation and

status of gas chromatograph]

[ ] describes the function.

F01.ai

DCS

DCS

GC8000

GC8000

Interface Unit

[Analog output from field devices /

Interface to contact I/O signals]

Process Gas Chromatograph

STARDOM FCM

Figure 1.1

Conceptual Diagram of the Ethernet Analyzer Bus System

4th Edition : Nov. 22, 2011-00

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