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CSAM Prototype status
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This page presents the current status of the CSAM prototype and the decisions taken
during the development process. Look here for the
Prototype Milestone Plan (Excel)
Architecture
The original architecture of the prototype is shown in the
Slides of Description.
The document
Prototype report describes the CSAM context and system diagram and different implementation alternatives.
The original architecture has changed due to the following reasons:
- Working with the prototype has put in evidence that using a SCADA together with the OLE Process
control at the supervision level it is not necessary to have a Master PLC S7-400 for all the ring.
This PLC could be useful, during the transition period, to animate the Central Synoptic at the Fire
Brigade.
- The comparison mechanism seems to be too complex for a safety system. For the moment the PLC's
will be conected to the TDS and SAT, and the display of alarms will be done independently. We hope
to clarify this point as soon as possible.
The
current architecture of the system has the following main characteristics:
- Optical Fiber ring (Industrial Ethernet). It is probable that Industrial Ethernet
will be adopted as the final solution instead of Profibus. The main reason is that
the remote access to master and slave PLC's is easier. Master PLC's will have addresses
of the type 180.40.x.0 (where x= 1, 2, .. stands for the number of the Safety Zone) and
slave PLC's will have adresses like 180.40.x.y (where y= 1,2 ... stands for the number of
slave)
- One S7-300 PLC (with redundant capabilities) interfaces each CIE and has two Ethernet
communication cards (see Detection Interface)
- S7-300 PLC's are slaves of the Master PLC of their Safety Zone (S7-400).
- The link between the Master Zone PLC and the Local Synoptic has to be defined.
Different solutions were discussed. The main concern is about having
remote access to the local synoptic to update it. Consistency with the HCI of the firemen
must be ensured. All these problems would be solved if the
"distributed web-page" concept is finally applied to the Master Zone PLC.
- The Reference DataBase for configuration will be common for SAT and STD systems.
To share the same DataBase, the need of a routing capability between
SAT and STD networks has been identified. This is because SAT and STD operate on
different Ethernet networks.
Detection interface
The question of how to do the interface with the detection equipment was discussed in the
meetings of 13/10/1999,
20/10/1999,
27/10/1999 and
3/11/1999.
The main discussion was to use one or two PLC's to interface with the CIE.
As a result of everybody proposals a
comparison study of alternatives was written.
Finally, in the meeting of
17/11/1999 everybody agreed on the solution presented in the "Analysis of CSAM Detection
Interface with CIE's" document. The CSAM interface to the Fire and Gaz Central Detection will
be made via ONE PLC. This PLC will be redundant (i.e. S7 400-H) and equipped with at least two
communications cards (SAT and STD paths). Furthermore, if necessary in order to assure the connection
between PLC and CIE, dry contacts coming out from the CIE will be treated by thePLC to check the
communication. The reasons for this option are explained in the document mentioned above.
Fieldbus Technology
Profibus DP and
Industrial Ethernet are being tested on the prototype.
However, from now efforts will be concentrated in the latter for the reasons mentioned before.
SCADA system
Bridgeview and
Iconics Genesis32 are being tested.
A mimic display showing a few tags is being developed for both.
Distributed web page concept
One alternative to traditional SCADA systems could be the use of webpages residing in the
master PLC of a safety zone. Only one set of views should be developed and maintained everywhere.
Another aspect to consider is that with this option we eliminate the need of PC's in each Safety
Zone. A special communication card for the Master Zone PLC has been purchased to test this
possibility in the prototype.
Human Computer Interface
The document
Prototype Alarm Display presents a proposal for the appearance of the mimics and alarm display.
CSAM
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Last modified at 1999-12-06 -- Send comments to: Carlos Soler Carlos.Soler@cern.ch
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CERN - European Laboratory for Particle Physics