Rockwell Automation 5370 CVIM Communications Manual - Manual (Page 134)

A–B
6
Chapter
6–1
Using the Pyramid Integrator Backplane
This chapter:
•
Describes the Pyramid Integrator Backplane.
•
Describes backplane communication techniques.
•
Describes CVIM module setup requirements
•
Contains a sample PLC–5/250 program.
Note: Refer to Publication No. 5000–2.3 (Allen–Bradley Pyramid Integrator
Technical Overview) for a description of the basic hardware components and
valid configurations. Use the related publications chart in Chapter 1 to
reference other Pyramid Integrator manuals as required.
Through the backplane, you can access an area of memory called Shared
Memory. Shared Memory consists of 1024 words (approximately half of
which are presently used). Shared memory contains:
•
CVIM module Discrete Bit Information (refer to Appendix B). These bits
include pass/fail/warning data for inspections and command bits for
CVIM module operation modes.
•
Results Data (refer to Appendix C).
•
In addition, you can access the CVIM module setup and configuration
data through the backplane. Refer to Appendix D.
There are four communications ports which you can simultaneously use to
access CVIM module data (Remote I/O, RS–232 (A&B), and Backplane).
Only one of the communications ports can be designated as the host at any
given time. Only the host can issue commands to control the operation of the
CVIM module, trigger inspections, upload/download configurations, and
change displays. You can read discrete bits and numerical results information
through any of the three communications ports, even through non–host
devices.
Note: See Chapter 2 for a description of multiple hosts.
Chapter Objectives
What Information can
be Accessed?
Host Designation