
1-2
Introduction
Date Code 980420
SEL-2711 Instruction Manual
Section Highlights
The following list summarizes the main purpose of each section:
•
Section 2: General Description
, provides an overview of Modbus Plus networking and a
description of the SEL-2711.
•
Section 3: Operation and Network Configuration
, describes SEL-2711 operation and
configuration.
•
Section 4: Operation Within SEL-2030
, provides detailed information on how to use the
SEL-2711 within the SEL-2030 including data maps.
•
Appendix A: Firmware Versions
, lists the firmware versions this manual applies to.
•
Appendix B: Error Codes and Messages
, lists the error codes and messages the SEL-2711
generates along with a description of why they might occur.
•
Appendix C: Modbus Plus Message Example
, illustrates how Modbus Plus application
messages are constructed.
C
ONVENTIONS
Numbers within this manual are generally shown as decimal values. When a number is shown in
hexadecimal, the letter ‘h’ is appended to the number. For instance, 11 is the decimal number
eleven, but 11h is the hexadecimal number eleven, which is equal to the decimal value 17.
Commands to be entered at a terminal are shown in bold all-caps. Literal terminal screen captures
are shown in a box, like the following example:
*>
SET P 17<ENTER>
SET P 17<ENTER>
.
.
.
A
CRONYMS
, A
BBREVIATIONS
,
AND
D
EFINITIONS
Acronym/
Abbreviation
Definition
CPU
Central Processing Unit
LED
Light Emitting Diode
LSB
Least Significant Byte
Modbus Plus™
A 1 Megabit/sec, token-passing network proprietary to Schneider
Automation
MSB
Most Significant Byte
node
A device connected to the network
RAM
Random Access Memory
SEL
Schweitzer Engineering Laboratories