Device naming

General Other
1

Hi,

I’m pretty new in using Tango in practice.

In the TANGO Control System Manual, version 9.1, section 3.3, I read that

[quote] Within Tango, a four field name space has been adopted consisting of
[//FACILITY/]DOMAIN/CLASS/MEMBER
Facility refers to the control system instance, domain refers to the sub-system, class the class and member
the instance of the device.[/quote]

I’ve then used a 4 field name space for my device, but in jive when I want to test it, I got an error “bad device name”, see screenshot in attachment.
I redone a new device with 3 fields (see attachment) and it works.

So, can we use 4 fields, that is the optional fourth field “facility” as said in the documentation or not, or may I did something wrong or …

Thanks for your help.

Laurence.

2

Hi Laurence,

The documentation is correct (hopefully). The first field which refers to the facility is most of the time useless.
Jive is connected to one facility and when you define devices using it, you do not mention the facility.
Nevertheless, Jive is also able to switch from one facility to another one using its Edit/“Change Tango host” menu
if you have several Tango control system (facility)
You mention the facility field when you are connected to one control system through your TANGO_HOST environment variable but
you want to connect to a device belonging to another control system (facility)

Hoping this help

Emmanuel

3

Thanks, it’s clear now.

Cheers,
Laurence