Datex-Ohmeda AS/3 Compact Monitor, CS/3 Compact Monitor
10
Document No. 896 623
2.3
Distributed processing
A system put together from AS/3 and CS/3 products is a multiprocessor system. All the modules
have their own microprocessor and they are doing the low-level functions such as module key
control, waveform filtering, pneumatic control, etc. At the same time the main CPU is doing higher
level tasks, e.g. trending and alarm control. While modules and CPU are doing their job, the UPI
processor takes care of all functions needed to transfer the data between modules and CPU. And
at the same time the processor on display control board is doing pixel calculations for graphics.
This kind of parallel processing gives one major advantage to centralized processing. Each time
new modules or boards are added to the system, the processing power is also increased. As a
result the system is not slowing down when new features are added.
Module
UPI or UPINET
Dual-port RAM
CPU
Display Control
Board
System memory
Display memory
RAM
Figure 3
Distributed Processing in AS/3 and CS/3 System
