1. Scaling to Larger Systems
Distribution
Number of process variables
Number of objects
Consistent set-values
Indirect indexing instead of search
(Application layer)

2. Three years ago Today – 3ys Tomorrow – 3ys today! today: LabVIEW 8
up to process variables per experiment
LabVIEW as the typical development tool
Tomorrow – 3ys
huge experiments
   10x process variables
How far can we go with LabVIEW?
What about LabVIEW 11?
today!
today: LabVIEW 8

3. Principles limited cable lengths
CPU and RAM per computer is (will always be) limited
Ethernet band width is limited
(re-)configuration can be a mess
... 
distribute control system over many nodes
event driven communication, no polling
only send interesting data (reduce data at the source)
identical treatment for local and remote receivers
only one nice configuration tool
object nets, application layer, persistency

4. Distribution myControlSystem depc123.gsi.de Cooling tmp1 tmp2 LV lec1
uec2
appc456.gsi.de HV
iseg1
iseg2
Vacuum
tp1
tp2
phpc789.gsi.de
Gas
valv1
valv2 HF
afg1
afg2
domain
node
system
object

5. domain is defined by "Dim Name Server"
Definition of Domain
myControlSystem
afg2
afg1
tp2
tp1
valv2
uec2
valv1
lec1
iseg2
iseg1
tmp2
tmp1
domain
object
domain is defined by "Dim Name Server"

6. Application Management
phpc789.gsi.de HF
appc456.gsi.de
Vacuum
depc123.gsi.de
Gas LV HV
calc.exe
Cooling
node
system
any application
create/supervise/destroy applications

7. Object Management: Application LayerHF
afg1
afg2
Vacuum
tp1
tp2
Gas
valv1
valv2 LV
lec1
uec2 HV
iseg1
iseg2
Cooling
tmp1
tmp2
system
object
create/supervise/destroy objects

8. define relationship between objects – "use objects"
Communication
afg2
afg1
tp1
tp2
valv2
uec2
valv1
lec1
iseg2
iseg1
tmp2
tmp1
object
define relationship between objects – "use objects"

9. Number of Process Variables (PV)
CS version <= 2.40d
~ 10,000 PVs
limited by NI-DSC
create off-line via "Tag Configurator"
LabVIEW 8
number of PVs?
LabVIEW PDS: can't create programmatically
LabVIEW DSC: it takes 2-3 minutes to create 1000 PVs
DIM
1,000,000 easily possible
4 seconds to create 100,000 PVs
2 minutes to create 1,000,000 PVs within one application (swapping...)

10. Number of Objects CS version <= 2.40d LabVIEW 8
limited by NI - DSC
LabVIEW 8
number of objects (related to number of PVs)?
LabVIEW DSC: it takes 2-3 minutes to create 1000 PVs
assume 10 PVs per object  100 objects per node
CS version > 2.40d
5,000 objects tested on two nodes
1 object corresponds to one complex device, like one DS345.

11. Consistent Set-Values
observer pattern, "one-to-many"
each object publishes its set-values as DIM service
GUIs or OPC-clients subscribe to that service
HV78
SetVoltage
GUI1
GUI2
OPC-Client

12. Present Management of Attributes
Search

13. Better Management of Attributes?
index

14. Conclusion
1,000,000 PVs demonstrated, an even larger number should be feasible
5,000 objects ( hardware devices) demonstrated, an even larger number should be feasible
Consistent set-values should be straight forward
Improvement of performance seems to be feasible with changed attribute data management (may require lots of work)
Performance of LabVIEW 8 DSC?
Application Management? (DomainConsole: tomorrow)
Object Management? (Application Layer: tomorrow)