Pascal Automation Controller

Would anyone be knowing what the internal architecture of a Pascal Automation Controlller is like? Is the architecture RISC or CISC? the registers etc?

Thank You

 

The user's logic code is compiled in PICED then runs in a virtual processor (in PICED or in the PAC).

 

The PAC does have some processor of its own to run the code right ? Which processor is that? For example most c bus touchscreens have the Intel Xscale processor.

 

The PAC runs on fairy dust and magic dandelions.

Seriously though, the PAC is not an embedded PC platform. It's an internally developed hardware platform running an internally developed operating system. The logic code is compiled, downloaded and executed by an internal sub-system within the unit. Then there's all the scheduling, time-keeping, serial I/O handling, etc. It's all specifically designed to be as reliable as possible. After all, it's not like a PC which you can re-boot if it BSOD's on you; it's an embedded device mounted goodness knows where with no visible user interface that has to just work for potentially years without a power cycle.

If you can state clearly why you want to know the details of what's inside, or what you're trying to achieve, perhaps we can better answer your question.

 

The implementation of the logic engine is a heavily customised version of the p-code machine. The operation of the logic engine is completely independent of the underlying hardware.