Allen-Bradley SLC 500 Series User Manual

1 Publication 1747-RM001G-EN-P - November 2008
Chapter 12
SLC Communication Instructions
This chapter contains general information about the SLC communication
instructions. Each of the instructions includes information on:
• what the instruction symbol looks like.
• how to use the instruction.
Table 12.1 Communication Instructions
Instruction Mnemonic Instruction Name Purpose Page
SVC Service Communications The SVC instruction interrupts the program scan to
execute the service communication portion of the
operating cycle.
12-3
MSG Message Read/Write This instruction transmits data from one node to another
on the communication network.
12-5
CEM ControlNet Explicit Message This instruction transmits CIP generic commands to other
ControlNet nodes via the 1747-SCNR.
12-45
DEM DeviceNet Explicit Message This instruction transmits CIP generic commands to other
DeviceNet nodes via the 1747-SDN.
12-52
EEM EtherNet/IP Explicit Message This instruction transmits CIP generic commands to other
EtherNet/IP nodes via channel 1.
12-58

Allen-Bradley SLC 500 Series Specifications

General

Brand	Allen-Bradley
Model	SLC 500 Series
Category	Controller
Language	English