beautypg.com

3 multiple processor modules in a rack – Rockwell Automation 47C626 AutoMax Programming Executive V4.2 User Manual

Page 146

background image

10Ć2

P/S

0

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15

10

10 Slot Rack

16

16 Slot Rack

6

6 Slot Rack

Figure 10.1 Ć Rack Slot Numbers

10.2

Additional Data Storage in a Rack

Containing a Single Processor Module

A Common Memory module M/N 57C413A or 57C423 can be used

to extend the amount of data storage available in a rack containing a

single Processor module. In this configuration, the M/N 57C413 or

57C423 Common Memory module makes available an additional

128K of memory to use for storing common variables. You cannot

use the Common Memory module to store application tasks or local

variables. See instruction manual JĆ3675 for more information on

common and local variables.

10.3

Multiple Processor Modules in a Rack

Additional Processor modules increase the processing capability and

the total memory available in any one rack for application tasks.

Multiple Processor modules in a rack require the use of a

Common Memory module in slot 0, where it serves as a bus arbiter

and stores data common to all the Processor modules. The Common

Memory module can be used to oversee communications for up to

four Processor modules, the maximum per rack. The Processor

modules can occupy slots 1Ć4 only. In a rack containing multiple

Processors, slot 1 must either contain a Processor module or be

empty.
In this configuration, the Common Memory module, rather than a

Processor module, also stores the configuration data. See JĆ3636 for

more information about the Common Memory module.
If you are using M/N 57C431 and M/N 57C435 Processors in the

same rack, make sure the leftĆmost Processor is a M/N 57C435

Processor. This will allow all communication between the AutoMax

rack and the personal computer to occur at 19200 baud.