Modbus Tcp; Modbus Interface For Siprocess Ga700 - Siemens SIPROCESS GA700 Operating Manual

Appendix
A.5 MODBUS TCP
A.5

MODBUS TCP

A.5.1

MODBUS interface for SIPROCESS GA700

General
Note
This product includes software developed by the MODBUS Organization, Inc. and its
suppliers.
MODBUS TCP is an industry standard for linking measuring and control instruments to
process control systems.
The standardized MODBUS TCP protocol based on TCP/IP is envisaged for the following
applications:
● Transmission of measured gas or pressure values between several analyzers in order to
correct the analytical values (correction of cross-interference, pressure compensation)
● Transmission of measured values and diagnostics data from analyzer to process control
system
The MODBUS uses a master/slave transmission procedure. The process control system is
always the master, analyzers are the slave.
In the case of a transmission of measured values between several analyzers, the device
using the measured values is the master. Devices that provide the measured values are the
slaves. Each master can scan the measured values of up to seven slaves.
Interfaces
The analyzer offers MODBUS communication with another analyzer or a process control
system over an Ethernet interface.
①
Figure A-2
284
Ethernet connection
Rear view of rack-mounted device
Operating with the Local User Interface
Operating Manual, 06/2017, A5E31930478-05