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AB PLC的EtherNet/IP Socket.doc
Application
Technique
EtherNet/IP Socket
Interface
Important User Information
Read this document and the documents listed in the additional resources section about
installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this
product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of
all applicable codes, laws, and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and
maintenance are required to be carried out by suitably trained personnel in accordance with
applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided
by the equipment may be impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential
damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because
of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot
assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information,
circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission
of Rockwell Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of
safety considerations.
WARNING:Identifiesinformationaboutpracticesorcircumstancesthatcancauseanexplosionina
hazardousenvironment,whichmayleadtopersonalinjuryordeath,propertydamage,oreconomicloss.
ATTENTION: Identifiesinformationaboutpracticesor circumstancesthatcanleadtopersonalinjury
or death, propertydamage,oreconomicloss.Attentionshelpyouidentifyahazard,avoidahazard,and
recognizetheconsequence.
IMPORTANT Identifies information that iscritical for successfulapplication andunderstanding of
theproduct.
Labels may also be on or inside the equipment to provide specific
precautions.
SHOCKHAZARD:Labelsmaybeonorinsidetheequipment,forexample,adriveormotor,toalert
peoplethatdangerousvoltagemaybepresent.
BURNHAZARD:Labelsmaybeonorinsidetheequipment,forexample,adriveormotor,toalertpeople
thatsurfacesmayreachdangeroustemperatures.
ARCFLASHHAZARD:Labelsmaybeonorinsidetheequipment,forexample,amotorcontrolcenter,
toalertpeopleto
potentialArcFlash.ArcFlashwillcausesevereinjuryordeath.WearproperPersonalProtectiveEquipment
(PPE).FollowALLRegulatoryrequirementsforsafeworkpracticesandforPersonalProtectiveEquipment
(PPE).
Allen-Bradley, Rockwell Software, Rockwell Automation, CompactLogix, ControlLogix, Logix5000, MicroLogix, RSLogix 5000, and TechConnect are
trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective
companies.
Newand
Updated
Informatio
n
Changes
Summaryof
This manual contains new and updated information. Changes
throughout this
revision are marked by change bars, as shown to the right of
this paragraph.
This table contains the changes made to
this revision.
Topic
UpdatedtheAdditional
Resources.
Updatedthelistof supported
modules.
AddedImportant messagetotheSocketInterface
Architecturesection.Updatedinstancecreationin
ReadSocket.UpdatedinstancecreationinWriteSocket.
UpdatedthelistofErrorCodesforSocket
Services.
Page
79
16
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Notes:
4
September2014
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Changes
Preface
SocketInterface
Architecture
SocketObject
Services
Tableof
Contents
Important User
Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 2
New and Updated
Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Additional
Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 7
Chapter1
Socket Interface
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Number and Type of
Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Sequence of Transactions for a TCP
Client . . . . . . . . . . . . . Typical Sequence of
Transactions for a TCP Server . . . . . . . . . . . . .
Typical Sequence of Transactions
for UDP
without
OpenConnection . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . .
Typical Sequence of Transactions
for UDP
with
OpenConnection. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . .
Communicate with the Socket Object via a MSG
Instruction . . . . . . . . Service
Timeouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . MSG Instruction
Timeouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . Socket Instance
Timeouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . Programming
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . .
TCP Connection
Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. ControlLogix Enhanced
Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . .
EtherNet/IP Module
Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change Controller Mode between Run and
Program. . . . . . . . . . . . Application Messages and
T
C
P
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
. . . . . . . . . . . .
. . . Application
Messages and
Uninhibited
Modules . . . . . .
. . . . . . . . . .
Partial
Reads . . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . . .
. . Partial
Writes . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . . .
. .
Performance
Considerations . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
. . . .
C
h
a
p
t
e
r
2
Socket
Create . . . . . . . . . .
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . .
MSG Source
Element . . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . .
MSG Source
Length . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . .
MSG
Destination
Element . . . . . .
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
OpenConnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MSG Source
Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . MSG Source
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . MSG Destination
Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
AcceptConnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
MSG Source
Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . MSG Source
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . MSG Destination
Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
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