393
Publication 1766-RM001A-EN-P - October 2008
Chapter
22
Communications Instructions
This chapter contains information about the Message (MSG) and Service
Communications (SVC) communication instructions. This chapter provides
information on:
•
Messaging Overview on page 393
•
SVC - Service Communications on page 396
•
•
The Message Element on page 399
•
Timing Diagram for the MSG Instruction on page 407
•
MSG Instruction Ladder Logic on page 411
•
•
Configuring a Local Message on page 414
•
Local Messaging Examples on page 423
•
•
Configuring a Remote Message on page 442
•
Configuring a Multi-hop Remote Message on EtherNet/IP
Communication Channel on page 445
•
Configuring a MicroLogix 1400 CIP Generic Message via Ethernet on
page 461
•
MSG Instruction Error Codes on page 466
•
Special Function with MSG instruction on page 468
The communication instructions read or write data to another station.
Messaging Overview
The communication architecture is comprised of three primary
components:
•
Ladder Scan
•
Communications Buffers
Instruction
Used To:
Page
SVC
Interrupt the program scan to execute the service communications
part of the operating cycle. The scan then resumes at the instruction
following the SVC instruction.
MSG
Transfer data from one device to another.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive