TANGO Device Server

Introduction:

This Python Device Server will allow to declare dynamic attributes which values will depend on a given time-dependent formula:

Example:

  Square=0.5+square(t) #(t = seconds since the device started)
NoisySinus=2+1.5*sin(3*t)-0.5*random()
SomeNumbers=DevVarLongArray([1000.*i for i in range(1,10)])

Attributes are DevDouble by default, but any Tango type or python expression can be used for declaration.
Format is specified at tango-controls.org

Signals that can be easily generated with amplitude between 0.0 and 1.0 are:

rampt(t), sin(t), cos(t), exp(t), triangle(t), square(t,duty), random()

The MaxValue/MinValue property for each Attribute will determine the State of the Device only if the property DynamicStates is not defined.

If defined, DynamicStates will use this format:

  FAULT=2*square(0.9,60)
ALARM=NoisySinus
ON=1

This device inherits from PyTango_utils.dynamic.DynamicDS Class

Class Inheritance:

• PyTango.Device_3Impl
• PySignalSimulator

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