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---+ PANDA Detector Control System

%TOC%
---++ PANDA DCS Technical Design

The present structure of PANDA experiment involves several sub-detectors and sub-systems (Fig.1). The Slow Controls (SC) of each PANDA sub-detector and sub-system are planned to be monitored and controlled from a supervisory software application.

<img alt="PandaCentralDCS.png" height="361" src="%ATTACHURL%/PandaCentralDCS.png" title="Fig.1: Panda Central DCS" width="640" />

In the past, an evaluation of several [[http://en.wikipedia.org/wiki/SCADA][SCADA]] development packages ( [[http://www.etm.at/index_e.asp][PVSS]], [[http://www.ni.com/LabView][LabView]], [[%EPICSWEBSITE%/][ EPICS]]) was performed by a PANDA slow controls subgroup and the EPICS package was selected to be the main PANDA SC software development tool.

<span style="background-color: transparent;">Due to the anticipated complexity of the whole PANDA DCS and the expected staged assembly of PANDA detector, the DCS is highly needed to be modular and scalable. In order to accomplish this, each PANDA sub-detector or sub-system is envisaged to be basically autonomous but manageable from a supervisory layer.</span>

<img alt="PandaDCSPartition.png" height="367" src="%ATTACHURL%/PandaDCSPartition.png" title="Fig. 2: Panda DCS Partition" width="640" />

The autonomy of each PANDA DCS partition (Fig. 2) implies that the partition should be self-controllable. This means that, specific slow control software, tailored to configure, monitor and control the hardware devices belonging to the partition, is required. Moreover, the partition specific software must be capable to share data with the supervisory layer.

<span style="background-color: transparent;">In order to ensure compatible data sharing between the DCS supervisory layer and DCS partition, an </span> <a href="https://github.com/epics-extensions/ca-gateway" target="_blank">EPICS Process Variable Gateway</a><span style="background-color: transparent;"> is required to be implemented by each PANDA DCS partition. Additionally, the PV Gateway will provide access rights administration and subnet interface.</span>

The SC operation of each partition will be performed from a dedicated graphical user interface (GUI). The interface must ensure the accurate and safe operation of the partition hardware. The complete interface, or part of it, will be embedded in the PANDA supervisory software.

At the moment, the state of the art user interface to EPICS is supported by the Control System Studio (CSS) framework. The technical design of PANDA DCS is planned to provide a set of guidelines for naming conventions, and graphical interface look and feel, in order to guarantee the similarity of the independent developed modules and to simplify the integration.

<span style="background-color: transparent;">The outcome of putting all the above requirements together is a PANDA DCS architecture based on a three-layer design – Supervisory, Control and Field layers. The highest level is the Supervisory one. The Control Layer is in the middle and it is the level where all the PANDA DCS partitions are connected. The Field Layer is embedded in each PANDA DCS Partition, and is made of all the devices and sensors used to monitor and control the sub-sytem.</span>

<img alt="PandaDCSLayers.png" height="311" src="%ATTACHURL%/PandaDCSLayers.png" title="Fig. 3: PANDA DCS Layers" width="640" />

Because the device driver software support in EPICS is limited, the software development tools used to control the lowermost layer (Field Layer) are at the free choice of the developer. The only constrain here is that the software must be integrated in the control layer with the EPICS system. However, the recommendation is that the developer, in the early stages of design, should try implement, were is possible, the same hardware and software, with EPICS support, realized by other PANDA sub-systems.
---++ PANDA DCS Partitions

PANDA DCS partitions together with the DCS coordinators are summarized in the table below:
| *PANDA System* | *DCS Partition* | *DCS Contact* |
| Magnets | Solenoid | |
| ^ | Dipole | |
| Targets | Pellet Target | Alexander Gerasimov |
| ^ | Cluster Jet Target | _Bogdan Zwieglinski_ |
| Beam line and Interaction Region | Interaction region | |
| Silicon Detectors | Pixels & Strips | Hans-Georg Zaunick |
| ^ | Luminosity Detector | _Florian Feldbauer_ |
| Trackers | Straw Tube Tracker | _Mario Bragadireanu_ |
| ^ | Planar GEM Trackers | _Bernd Voss (?!)_ |
| ^ | Forward tracking | %BLACK%Jerzy Smyrski<br />%ENDCOLOR% |
| Electromagnetic Calorimeter | Barrel EMC | Tobias Triffterer |
| ^ | Backward Endcap EMC | ^ |
| ^ | Forward Endcap EMC | ^ |
| Forward Shashlyk | Forward Shashlyk | _Sofia Bukreeva_ |
| Charged Particle ID | Barrel DIRC | Carsten Schwarz |
| ^ | Endcap Disc DIRC | Avetik Hayrapetyan |
| ^ | Forward RICH | Sergey Kononov |
| ^ | %BLACK%Barrel TOF (SciTil)%ENDCOLOR% | _Ken Suzuki_ |
| ^ | Forward TOF | Denis Veretennikov |
| Muon system | Muon system | Nikolay Zhuravlev |
| Hypernuclear Equipment | Target system | Michael Bölting |
| ^ | Ge Det | Marcell Steinen |
| Infrastructure | Supplies | |
<span style="background-color: transparent;">The team taking responsibility for the controls of a PANDA DCS partition is expected to provide:</span>
   * implementation of controls for the hardware devices belonging to the Field Layer of the partition;
   * the software running on the Control Layer of the partition;
   * the partition GUI software;
   * the autonomous operation of the partition.

The PANDA DCS sub-system manager is responsible with:
   * the preparation of DCS technical design;
   * monitor (and guarantee) the implementation of the DCS technical design;
   * the integration of the DCS partitions in the supervisory layer;
   * organize the development of the DCS supervisory software.
---++ PANDA DCS Technical Support
---+++ %TEAL%Hardware and Software%ENDCOLOR%
   * SupportedHardware is a wiki describing the proposed/tested/supported sensor/control hardware for the PANDA DCS. Early contributions have the chance to set the standards and significantly help other detector subgroups. Please contribute.
   * [[PANDACSS][PANDA CSS]] (outdated version!)
---+++ %TEAL%Process Variables Naming Convention%ENDCOLOR%

The naming convention for PANDA slow control process variables is outlined in this wiki: PVNamingConventions. We recommend implementing these rules early, to avoid later confusion.
---+++ %TEAL%Tutorials and Examples%ENDCOLOR%
   * [[DCS.EPICSstartUsingStreamDev][Getting started with EPICS using StreamDevice]]
   * <a href="https://indico.gsi.de/event/3015/" target="_blank">Tutorial/Hands-on Workshop ,23-25 February 2015, University Mainz</a><a href="https://indico.gsi.de/event/3015/" target="_blank"><br /></a>
   * <a href="https://wiki.gsi.de/Epics" target="_blank">GSI Epics Wiki</a>
   * <a href="%EPICSWEBSITE%/docs/training.php" target="_blank">Training</a>
---++ Information exchange
---+++ News
   * The DCS group has prepared a draft for the "<a href="https://panda-wiki.gsi.de/foswiki/pub/DCS/WebHome/dcs-fee-interface-draft-68bc99a4.pdf" title="Concept for the Interface between the PANDA Detector Control System and the Front-End Electronics">Concept for the Interface between the PANDA Detector Control System and the Front-End Electronics</a>".<br />It will be discussed at the<a href="https://indico.gsi.de/event/7173" title="PANDA DAQ/FEE Workshop @ GSI Indico"> PANDA DAQ/FEE workshop</a> 28 May - 30 May 2018.
---+++ Wiki

You are currently on the homepage of the PANDA DCS wiki, so we shouldn't need to explain how to find it... ;-)

To gain write access to this wiki, you have to be a member of the Main.PandaControlsGroup. This is also required for being able to upload your talks to the DCS.TalksArchive. If you want to become a member of the Main.PandaControlsGroup, ask its coordinator [[Main.FlorianFeldbauer][Florian Feldbauer]].
---+++ Meetings
   * Next PANDA DCS session: Parallel session @ PANDA CM 19/2 at GSI;
   * The master archive with presentations from all our subgroup meetings is here: DCS.TalksArchive. Please attach your talks using your account, such that the author name is visible and easy to search for. Preferred format is PDF.
---+++ Forum

The DCS subgroup forum is located [[https://forum.gsi.de/index.php?t=thread&frm_id=160][here]].
---++ Contacts

The PANDA SC subgroup has been formed in 2007. The subgroup is basically made by people, from different PANDA collaborating institutions, involved in the slow controls of the experiment, chaired by the SC sub-system manager. The most up-to-date list of DCS members can be found [[http://panda-controls.gsi.de/DB/interactiveTable.php?name=Contacts][here.]] The present subgroup chairman is [[Main.FlorianFeldbauer][Florian Feldbauer]].

The DCS mailing list is [[mailto:panda-dcs@gsi.de][panda-dcs@gsi.de]].

Topic attachments
I	Attachment	Action	Size	Date	Who	Comment
png	DCS-LayersDAQ-generic-w-small.png	manage	223.4 K	04 Sep 2009 - 18:51	DanProtopopescu	DCS components (small) with AFECS
png	DCS-LayersDAQ-wbg-small.png	manage	111.6 K	09 Apr 2008 - 22:30	DanProtopopescu	DCS components (small)
png	DCS_small.png	manage	62.3 K	06 Dec 2007 - 16:15	DanProtopopescu	DCS interrelations graph (small)
png	PandaCentralDCS.png	manage	70.0 K	12 Oct 2014 - 17:48	MarioBragadireanu
png	PandaDCSLayers.png	manage	110.6 K	12 Oct 2014 - 17:53	MarioBragadireanu
png	PandaDCSPartition.png	manage	66.7 K	12 Oct 2014 - 17:51	MarioBragadireanu
pdf	dcs-fee-interface-draft-68bc99a4.pdf	manage	268.6 K	13 Mar 2019 - 03:04	FlorianFeldbauer	Concept Draft for the Interface between the PANDA DCS and the FEE

Topic revision: r97 - 13 Mar 2019, FlorianFeldbauer

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