User`s manual

6. Viewer
Barco – Apollo – DOC-3197-2 – user's manual – Revision 08 – November 2006
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6.5 Communication memory
Since Apollo Rel. 1.8, the communication memory is automatically set via the viewers
specified in the Apollo Configurator, TransForm A shape, custom properties: number of
viewers.
As an empiric value, every viewer contributes with 210 kB to the basic requirement of 4096 kB of communica-
tion memory.
Depending on the actual Apollo configuration (Master only, Master and Slave) the required memory is calculated
and allocated to the Control Room Bus. This is done automatically when making exporting the visio configuration
file for the project, provided the correct number of viewers is entered in the shape of the TransForm A master /
TransForm A slave/Client workstation.
Let's define N as sum of all viewers of all computers in the project and M as number of viewers of the computer.
In a master only project, the following communication memory is required:
• for the master computer: crbComSize=4096+N*210
• for the client computer: crbComSize=4096+M*210
• for the operator workstation: crbComSize=4096
In a master/slave project, the following communication memory is required:
• for the Master and Slave computer: crbComSize=8192+N*420
• for the client computers: crbComSize=4096+M*420
• for the operator workstation: crbComSize=4096
(due to the master/slave configuration, the basic load and the contribution of a viewer is counted twice. Of
course the sum of viewers and the number of viewers is the same.)
The more viewers are running, the more communication memory of the Control Room Bus is needed. The size of
this memory is defined in the file startup.bat.
The file startup.bat as delivered with the Apollo installation sets the crbComSize to 10240. After the actual con-
figuration of the project via the Apollo Configurator, the crbComSize is adjusted according the actual require-
ments.