80 lines
3.1 KiB
Python
80 lines
3.1 KiB
Python
# *****************************************************************************
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors:
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# Markus Zolliker <markus.zolliker@psi.ch>
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# Leon Zimmermann <leon.zimmermann@psi.ch>
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# *****************************************************************************
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"""Powersupply TDK-Lambda GEN8-400-3P400"""
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from frappy.core import StringIO, Readable, Parameter, Writable, HasIO
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from frappy.datatypes import BoolType, EnumType, FloatRange
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class IO(StringIO):
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end_of_line = ('OK\r', '\r')
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default_settings = {'baudrate': 9600}
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class Power(HasIO, Readable):
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value = Parameter(datatype=FloatRange(0,3300,unit='W'))
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def read_value(self):
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reply_volt = self.communicate('MV?')
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reply_current = self.communicate('MC?')
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volt = float(reply_volt)
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current = float(reply_current)
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return volt*current
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class Output(HasIO, Writable):
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value = Parameter(datatype=FloatRange(0,100,unit='%'))
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target = Parameter(datatype=FloatRange(0,100,unit='%'))
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mode = Parameter('regulation mode', EnumType(voltage=1, current=2, both=3),
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default='voltage', readonly=False)
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maxvolt = Parameter('voltage at 100%',
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datatype=FloatRange(0,8,unit='V'), readonly=False)
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maxcurrent = Parameter('current at 100%',
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datatype=FloatRange(0,400,unit='A'), readonly=False)
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output_enable = Parameter('control on/off', BoolType(), readonly=False)
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def initModule(self):
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super().initModule()
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self.write_output_enable(False)
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def write_target(self, target):
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# take care of proper order
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if target == 0:
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self.write_output_enable(False)
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prev_curr = self.communicate(f'PC?')
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volt = self.maxvolt if self.mode == 'current' else self.maxvolt * 0.01 * target
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curr = self.maxcurrent if self.mode == 'voltage' else self.maxcurrent * 0.01 * target
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if curr < prev_curr:
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self.communicate(f'PC {curr:.6g}')
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self.communicate(f'PV {volt:.6g}')
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else:
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self.communicate(f'PV {volt:.6g}')
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self.communicate(f'PC {curr:.6g}')
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if target:
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self.write_output_enable(True)
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self.value = target
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def write_output_enable(self, value):
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self.communicate(f'OUT {int(value)}')
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def shutdown(self):
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self.write_target(0)
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