Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

341 Publication 1763-RM001B-EN-P - April 2007
Chapter 20
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 341
• SVC - Service Communications on page 344
• MSG - Message on page 346
• The Message Element on page 347
• Timing Diagram for the MSG Instruction on page 356
• MSG Instruction Ladder Logic on page 360
• Local Messages on page 361
• Configuring a Local Message on page 363
• Local Messaging Examples on page 373
• Remote Messages on page 388
• Configuring a Remote Message on page 391
• Configuring a Multi-hop Remote Message on EtherNet/IP
Communication Channel on page 394
• Configuring a MicroLogix 1100 CIP Generic Message via Ethernet
(OS Series B FRN 4 or later) on page 21-62
• MSG Instruction Error Codes on page 414
• Special Function with MSG instruction (OS Series B FRN 4 or later)
on page 416
The communication instructions read or write data to another station.
Messaging Overview
The communication architecture is comprised of three primary
components:
• Ladder Scan
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.
344
MSG Transfer data from one device to another. 346
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Allen-Bradley MicroLogix 1100 Specifications

General

Processor	32-bit
Programming Software	RSLogix 500
Mounting	DIN rail or panel mount
Power Supply	24V DC
Type	Compact PLC
Digital Inputs	12
Digital Outputs	8
Analog Inputs	4 (depending on model)
Analog Outputs	Optional with expansion module
Programming Language	Ladder Logic
Operating Temperature	0 to 55 °C (32 to 131 °F)
Series	MicroLogix