TANGO Device Server

Introduction:

The undulator class for the Petra3 beamlines implements the basic parameters (gap, taper, velocity) to drive an undulator from a beamline. It also handles the state and disables the access in case of a local usage or an exclusive usage by the acceleraor control room.

The undulator control is handled by a Tine device in the accelerator control system. The Tine device has to be mapped into a Tango device by the Tine To Tango Gateway (TTTGW class). You have to specify the name of a TTTGW device for every device of this class.

The Tine undulator device has many more attributes and shows the hardware state via a control byte and a status byte.
Control byte information:

bit 1 (0x2) = set when vacuum interlock OK
bit 2 (ox4) = set when beamline access enabled

Status byte information:

1 - local control for comissioning
5 - Undulator moves
6 - Undulator ready to move
7 - Error detected by local control, try to reset
10 - local control is switched off
27 - Undulator is ready to move, but an incoherent read and set value was detected

Class Inheritance:

• Tango::Device_4Impl
• Petra3Undulator

Class Description:

• Device description.
• Properties description
• States description
• Commands description
• Attributes description

Conclusion:

The device server is ready for distribution application programmers.
The author will be interested in any feedback which arise from their usage of this device server.

TANGO is an open source project hosted by :

Core and Tools : CVS repository on tango-cs project Device Servers : CVS repository on tango-ds project