Table Of Contents - ABB Relion 620 Series Protocol Manual

620 series
Communication Protocol Manual

Table of contents

Section 1 Introduction.......................................................................5
This manual........................................................................................ 5
Intended audience.............................................................................. 5
Product documentation.......................................................................6
Product documentation set............................................................6
Document revision history............................................................. 6
Related documentation..................................................................7
Symbols and conventions...................................................................7
Symbols.........................................................................................7
Document conventions.................................................................. 7
Section 2 Modbus overview............................................................. 9
Modbus standard................................................................................9
Serial communication.................................................................... 9
Ethernet communication................................................................9
Application data implementation .................................................10
Terms and definitions.................................................................. 10
Documentation............................................................................ 10
Section 3 Vendor-specific implementation..................................... 13
Protocol server instances................................................................. 13
Connection to clients................................................................... 13
Protocol server attachment to a client......................................... 14
Several identical client connections.............................................14
Protocol data mapping to server instances................................. 14
Modbus link alternatives................................................................... 15
Serial link..................................................................................... 15
Modbus serial link parameters............................................... 15
Modbus serial diagnostic counters......................................... 17
Troubleshooting serial communication...................................17
Character framing in different serial link modes..................... 18
TCP/IP link...................................................................................18
Modbus TCP/IP diagnostic counters...................................... 19
Supported Modbus function codes................................................... 19
Application functions....................................................................19
Diagnostic functions.................................................................... 20
Exception codes.......................................................................... 21
Modbus application data...................................................................21
Modbus data objects................................................................... 21
Modbus data implementation...................................................... 22
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