Yokogawa GC1000 Mark II Process Gas Chromatograph - Manual (Page 8)

<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