
Date Code 980420
General Description
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SEL-2711 Instruction Manual
TABLE OF CONTENTS
SECTION 2: GENERAL DESCRIPTION................................................... 2-1
Basic Network Topologies.................................................................................................2-1
Modbus Plus Message Routing..........................................................................................2-2
Modbus Plus Routing Paths .......................................................................................2-2
Paths to Programmable Controllers............................................................................2-2
Paths to Network Adapters ........................................................................................2-3
Paths to Bridge Multiplexers......................................................................................2-3
Path Types ................................................................................................................2-3
Path Quantities ..........................................................................................................2-4
Queuing ....................................................................................................................2-4
Modbus Data Access Commands ......................................................................................2-4
Modbus Data Addressing ..................................................................................................2-5
TABLES
Table 2.1:
Modbus Data Access Commands ......................................................................................2-5
FIGURES
Figure 2.1:
Application Overview .......................................................................................................2-1
Figure 2.2:
Message Frame Routing Path............................................................................................2-2
Figure 2.3:
SEL-2711 Block Diagram.................................................................................................2-6