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saia-pcd.com
Automation stations – the basics
We developed the core of the Saia PCD® operating
systems between 2001 and 2003 as part of a European
cooperation project with Philips and Nokia. We then
expanded the core and focused on an operating system
for advanced, industry-quality measuring, control and
regulation devices. A dedicated operating system for
ICA technology – a control operating system (COS).
Developed in-house and with all aspects fully covered.
Saia PCD® COSinus – Control Operating System
Why COSinus?
The control operating system (COS) ensures that customers’ application software will always operate on
all platforms, is portable across device generations and expandable over several decades. Hardware and
the Windows® programming tools may change, but the customer will not have to modify the application
code. The hardware, software tool and application software can be compared to the sides of a triangle.
If hardware and/or software changes, the angles must adjust for the application software to remain
unchanged. We expanded the abbreviation COS to the name COSinus due to the trigonometric relation-
ships in triangles.
The COSinus operating system always provides the application with the same infrastructure, regardless of the underlying hardware and processor.
The key to this is the Saia virtual machine. It ensures that an application program created with PG5 works on all PCDs across generations.
The main components of Saia PCD® COSinus
1
Multi-tasking kernel:
Abstracts the hardware, incl. I/Os and communication interfaces, provides basic multi-tasking functionality
on which the program processing of Saia PCD® programming is also based.
2
Virtual Saia PCD® machine:
This is the logic machine that executes the PG5 programs. The virtual Saia PCD® code is interpreted
and guarantees that programs are always executed in a consistent manner on different PCD controllers. The three hubs
of the PG5 application program are the following:
Media:
Memory of the virtual PCD machine such as registers, flags, meters, etc.
Program execution:
Program and organisation blocks, text, monitoring, error processing, memory management, etc.
System functions:
Access to the hardware, I/Os, interfaces and drivers
3
Automation Server:
The Automation Server includes widely used web/IT technologies and ensures data exchange between
users and automation solutions with no proprietary hardware or software required.
4
Communication protocols:
Various field and automation protocols such as BACnet®, L
on
, Profibus, Modbus, DALI, M-Bus,
and many others.
Saia PCD® COSinus connects user programs
and various hardware
User application
Automation Server
Communication
protocols
Virtual Saia PCD® machine
Kernel
COSinus
Hardware type A
User application
Automation server
Communication
protocols
Virtual Saia PCD® machine
Kernel
COSinus
Hardware
User application
Automation Server
Communication
protocols
Virtual Saia PCD® machine
Kernel
COSinus
Hardware type B
