Issue: RF plant definitions

[gubaidulinvadim]

@JeanLucPons, I'm trying to manually configure rf plant for our digital twin. Currently, this is not possible.

  - type: pyaml.rf.rf_plant
    name: RF
    masterclock:
      type: tango.pyaml.attribute
      attribute: simulator/ringsimulator/ringsimulator/RfFrequency
      unit: Hz

I did a dirty solution in my local branch in control.controlsystem and in lattice.simulator:

             if e._cfg.transmitters:
                 for t in e._cfg.transmitters:
                    voltage = RWRFVoltageScalar(t)
                    phase = RWRFPhaseScalar(t)
                    nt = t.attach(self,voltage,phase)
                    self.add_rf_transnmitter(nt)
                    attachedTrans.append(nt)

I'm not entirely sure this is needed for pyAML to define only the masterclock. But for tests this is very useful to not define the whole rf plant.

[JeanLucPons]

The transmitters are needed to set up:

• voltage, frequency and phase on cavities of the model.
• RF voltage on the control system.

I propose, if transmitters are not defined, to:

• Default to at.set_rf_frequency() at.set_rf_voltage() for model (it will apply change by conversing ratio between cavities with the values present in the lattice file)
• RF voltage/phase setting on the control system is not possible.

If it can help, here is the config for our VA. You just need the list of cavity names in the model.

    transmitters:
      - type: pyaml.rf.rf_transmitter
        name: RFTRA
        cavities: [CAV_C05_01,CAV_C05_02,CAV_C05_03,CAV_C05_04,CAV_C05_05,CAV_C07_01,CAV_C07_02,CAV_C07_03,CAV_C07_04,CAV_C07_05,CAV_C25_01,CAV_C25_02,CAV_C25_03]
        harmonic: 1
        distribution: 1
        voltage:
          type: tango.pyaml.attribute
          attribute: sys/ringsimulator/ebs/RfVoltage
          unit: V