Tango attribute counters

tango_attr_as_counter class allows to read a Tango attribute in BLISS as a counter.

Configuration parameters¶

class: name of the controller class to use: tango_attr_as_counter
uri: address of the Tango device
- <host>:<port>/ prefix has to be added if device is defined on another TANGO_HOST than the default one.
counters: list of counters wanted
- name (str): name to use for the BLISS counter
- attr_name (str): name of the Tango attribute
- unit (optional) (str). If specified, it will be used by BLISS instead of Tango configuration parameter unit.

Tango attribute parameters¶

If the following parameters are defined in the attribute configuration (in Tango database), and not overwritten in YAML configuration, they will be used in BLISS:

unit (string): label used to specify units of the attribute value.
display_unit (float): conversion factor (to change unit of the attribute value) by which the raw read value is multiplied.

Examples¶

Example to read ring current and beam lifetime from The Machine device server:

orion:10000/ prefix is used to access Tango database of The Machine.

- class: tango_attr_as_counter
  uri: orion:10000/fe/id/42
  counters:
    - name: srcur
      attr_name: SR_Current
      unit: mA
    - name: lifetime
      attr_name: SR_Lifetime

Example to read a wago thermocouple via a Tango device server attribute:

- class: tango_attr_as_counter
  uri: id42/wcid42k/tg
  counters:
    - name: kohztc5
      attr_name: kohztc5
      unit: deg
    - name: kohztc6
      attr_name: kohztc6
      unit: deg
    - name: kohztc7
      attr_name: kohztc7
      unit: deg

Example of ct() with timing:

first count : 106 ms
second count : 65 ms

CYRIL [2]: import   time
CYRIL [3]: t0=time.time();ct(0.0001, kohztc5, flowBase, flowM2, flowM1,
                                     m0m2, pptc1);print("duration=", time.time()-t0)

get_proxy -- create dict
get_proxy -- create proxy for id21/wcid21m0/tg
get_proxy -- create proxy for id21/wcid21k/tg
get_proxy -- create proxy for id21/wcid21hpps/tg
Tue Jul 23 15:56:13 2019

           dt[s] =          0.0 (         0.0/s)
  flowBase[l/mn] =        0.489 (      4890.0/s)
    flowM1[l/mn] =       0.8865 (      8865.0/s)
    flowM2[l/mn] =       0.7301 ( 7300.999999999999/s)
            m0m2 =      23.3999 ( 233998.99999999997/s)
    kohztc5[Deg] =         20.6 (    206000.0/s)
      pptc1[Deg] =         14.1 (    141000.0/s)
duration= 0.10665655136108398


CYRIL [4]: t0=time.time();ct(0.0001, kohztc5, flowBase, flowM2, flowM1,
                                     m0m2, pptc1);print("duration=", time.time()-t0)
Tue Jul 23 15:56:15 2019

            dt[s] =          0.0 (         0.0/s)
  flowBase[l/min] =       0.5111 (      5111.0/s)
    flowM1[l/min] =       0.9117 (      9117.0/s)
    flowM2[l/min] =       0.6843 (      6843.0/s)
             m0m2 =      23.3999 ( 233998.99999999997/s)
     kohztc5[Deg] =         20.6 (    206000.0/s)
       pptc1[Deg] =         14.1 (    141000.0/s)
duration= 0.06498312950134277

Tests¶

Test files:

bliss/tests/controllers_sw/test_tango_attr_counters.py
bliss/tests/test_configuration/tango_attribute_counter.yml

pytest tests/controllers_sw/test_tango_attr_counters.py