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Defining a Naming Convention for devices in the LCLS Control System has been an iterative process. The first version was a variation on the existing SLAC SLC Naming Scheme. With the LCLS and the addition of X-Ray transport lines and experimental halls, we decided to extend the Original LCLS scheme to what is described here.
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h1. Format Summary
Devices are named with a sequence of characters in the following format:
{center}{*}DeviceType* : *Area* : *Position{*}{center}
An example of a device name looks like this:
{center}{*}QUAD* : *IN20* : *122* {center}
There are functions and parameters associated with devices, which also need to be identified. An _Attribute_ field provides that information:
{center}{*}DeviceType* : *Area* : *Position* : *Attribute* {center}
The _DeviceType_ and _Position_ fields also have optional characters. We can denote optional symbols with *\[* and *\]*, so the names can be described as:
{center}*\[* DeviceType *\]* *DeviceDetail* : *Area *: *\[* PositionPrefix *\]* *Position* : *Attribute* {center}
*To summarize*:
* A Device is named by 3 fields, separated by 2 colons.
* A function or parameter of a device, known internally to the Control System as a Process Variable (PV) is named by the 3-field device name followed by another colon, and the Attribute field.
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Table 1.10 |
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Area | Physical Location |
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LI00 | LINAC Sector 0 |
LR20 | Laser Room (Upstairs, near sector 20) |
IN20 | Injector |
LI20 | LINAC Sector 20 |
LI21 | LINAC Sector 21 |
LI22 | LINAC Sector 22 |
LI23 | LINAC Sector 23 |
LI24 | LINAC Sector 24 |
LI25 | LINAC Sector 25 |
LI26 | LINAC Sector 26 |
LI27 | LINAC Sector 27 |
LI28 | LINAC Sector 28 |
LI29 | LINAC Sector 29 |
LI30 | LINAC Sector 30 |
MCC0 | Main Control Center (Bulding 005) |
BSY0 | Beam Switchyard Common-line |
BSYN | Beam Switchyard North Arc |
BSYS | Beam Switchyard South Arc |
BSYA | Beam Switchyard A-line |
ESA0 | End Station A and Beam Dump East |
BSYB | Beam Switchyard B-line |
LTU0 | LINAC-to Undulator Switchyard |
LTU1 | LINAC-to-Undulator Line 1 |
UND1 | Undulator on Line 1 |
DMP1 | Beam Dump on Line 1 |
FEE1 | Front End Enclosure on Line 1 |
NEH1 | Near Experimental Hall on Line 1 |
XRT1 | X-Ray Tunnel on Line 1 |
FEH1 | Far Experimental Hall on Line 1 |
XT01 | X-Band Test Area |
SYS0 | LCLS-I System |
SYS1 | FACET System |
SYS2 | LCLS-II System |
SYS3 | LCLS-III System |
SYS4 | NLCTA System |
SYSW | Global System West |
SYSE | Global System East |
GLB0 | Global to all Machines |
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