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frappy_psi.bkpower: improve doc

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Change-Id: I0736d1d8a40b0140bfdbf5aca189b8ddc5b22973
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zolliker 2024-11-26 13:39:34 +01:00
parent f1b59e4150
commit 5b9e36180e
1 changed files with 41 additions and 12 deletions
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53
frappy_psi/bkpower.py
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@ -17,51 +17,80 @@
# Markus Zolliker <markus.zolliker@psi.ch>
# Jael Celia Lorenzana <jael-celia.lorenzana@psi.ch>
# *****************************************************************************
"""Powersupply B&K Precision BK168xB"""
"""Powersupply B&K Precision BK168xB
The following lines are part of a config file for the frappy-server process
The frappy server creates the following modules and refreshes the values with a refresh rate of 1 sec.
The communication with the powersupply is established via serial over USB.
The manual can be found here https://www.vectortechnologies.gr/images/products/2022/02/168xB_programming_manual.pdf
Mod('htr_io',
'frappy_psi.bkpower.IO',
'powersupply communicator',
uri = 'serial:///dev/ttyUSBupper',
)
Mod('htr',
'frappy_psi.bkpower.Power',
'heater power',
io= 'htr_io',
)
Mod('out',
'frappy_psi.bkpower.Output',
'heater output',
io = 'htr_io',
maxvolt = 50,
maxcurrent = 2,
)
"""
from frappy.core import StringIO, Readable, Parameter, FloatRange, Writable, HasIO, BoolType
# define the IO class
class IO(StringIO):
end_of_line = ('OK\r', '\r')
default_settings = {'baudrate': 9600}
class Power(HasIO, Readable):
value = Parameter(datatype=FloatRange(0,300,unit='W'))
def read_value(self):
reply = self.communicate('GETD')
volt = float(reply[0:4])/100
current = float(reply[4:8])/100
return volt*current
class Output(HasIO, Writable):
value = Parameter(datatype=FloatRange(0,100,unit='%'))
target = Parameter(datatype=FloatRange(0,100,unit='%'))
maxvolt = Parameter('voltage at 100%',datatype=FloatRange(0,60,unit='V'),default=50,readonly=False)
maxcurrent = Parameter('current at 100%',datatype=FloatRange(0,5,unit='A'),default=2,readonly=False)
output_enable = Parameter('control on/off', BoolType(), readonly=False)
def initModule(self):
super().initModule()
self.write_output_enable(False)
def write_target(self, target):
self.write_output_enable(target != 0)
self.communicate(f'VOLT{round(max(8,target*self.maxvolt/10)):03d}')
self.communicate(f'CURR{round(target*self.maxcurrent):03d}')
self.value = target
def write_output_enable(self, value):
self.communicate(f'SOUT{int(not value)}')
def write_maxvolt(self, maxvolt):
self.communicate(f'SOVP{round(maxvolt*10):03d}')
def write_maxcurrent(self, maxcurrent):
self.communicate(f'SOCP{round(maxcurrent*100):03d}')
def shutdown(self):
self.write_target(0)