Mar.8 IEC 61499 Overview notes

IEC61499 (notes for an overview for tutorial)  
(notes from:    Want to switch Lewis quotes to quotes from offical standand - if understandable)
-L= Lewis : Modelling control systems using IEC 61499, pp.22-
- 4DIAC 
)

FB = Function Block 

Main focus: model the behaviour of FBs within each resource.p.24 L

• System Model "defines the relationship between communicating devices and applications." p.22 L
• has application(s)
• has device(s)
• Device Model
• has resource(s) (similiar to 61131-3)
• "load and unloads distributed applications without disturbing existing applications" via management services
• "has a process interface to exchange data via external networks with resources in remote devices." p.23 L
• has a communication interface(outside of 61499) that provides communications services for resources to exchange data via external networks with resources in remote devices." p.23 L
• has fragments of FB networks
• Resource Model - "provides facilities and services to support the execution of one or more FBs application fragments."p.24 L
• provides interfaces via Service Interface (SI) FBs
  
•  to the communications systems (in 4DIAC FBs in netwk palette)
•  to the 'device specific processes'."p.24 L (via SI FBs)
•  supports independent operation It can be: loaded, configured, started, stopped L p.24
•  [coordination of (different) resources when starting an application not yet addressed] L p.24
•  Application Model - a network of interconnect FBs, linked by events and data flows.L p.25
• can be fragmented and distributed over many resources (what is "fragmented"? into FBs?)
• can have sub-applications (are they supported in 4DIAC?) 
• Function Block
• "allocated to a resource with interconnected devices."p.24 Lewis book
• has in / out 
• events and 
• data
• Types 4diac
• Simple (? - not supported in 4diac)
• Basic
• Composite
• Service Interface (SI) "provide a link between FBs and resource interfaces"L p.24 in 4DIAC via code added to the C++ code generated from the 61499 XML.
• Adapter (? - not supported in 4diac)

Differences btw. 61131-3 and 61499

• Platforms and tools can't interoperate 4DIAC_Initiative.pdf p.5