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refactored

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This commit is contained in:
Wolfgang Hottgenroth
2019-06-19 23:06:48 +02:00
parent 3fbcedc7ed
commit 3c582ca833
1 changed files with 40 additions and 59 deletions
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85
snippets/test7.py
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@ -22,6 +22,15 @@ def registersToIeeeFloatReverse(i):
) )
)[0] )[0]
def dataConverter(t, d):
if t == 'F':
return registersToIeeeFloat(d)
elif t == 'RF':
return registersToIeeeFloatReverse(d)
else:
raise Exception("Converter '{0}' is not supported".format(t))
class ModbusException(Exception): class ModbusException(Exception):
def __init__(self, resp): def __init__(self, resp):
self.msg = str(result) self.msg = str(result)
@ -29,6 +38,25 @@ class ModbusException(Exception):
def __str__(self): def __str__(self):
return self.msg return self.msg
class ModbusRequestDefinition(object):
def __init__(self, unit, address, count, converter, label):
self.unit = unit
self.address = address
self.count = count
self.converter = converter
self.label = label
reqs = [
ModbusRequestDefinition(1, 0x2000, 2, 'F', 'Voltage'),
ModbusRequestDefinition(1, 0x2020, 2, 'F', 'Frequency'),
ModbusRequestDefinition(1, 0x2060, 2, 'F', 'Current'),
ModbusRequestDefinition(3, 0x0004, 2, 'RF', 'Resistance Channel 1'),
ModbusRequestDefinition(3, 0x000C, 2, 'RF', 'Temperature Channel 1'),
ModbusRequestDefinition(3, 0x0014, 2, 'RF', 'Resistance Channel 2'),
ModbusRequestDefinition(3, 0x001C, 2, 'RF', 'Temperature Channel 2'),
]
ser=RS485Ext.RS485Ext(port='/dev/ttyAMA0', baudrate=1200, stopbits=1, ser=RS485Ext.RS485Ext(port='/dev/ttyAMA0', baudrate=1200, stopbits=1,
@ -41,63 +69,16 @@ client.connect()
delay = 0.05 delay = 0.05
while True: while True:
for req in reqs:
try: try:
# BG-Tech, Voltage
result = client.read_holding_registers(address=0x2000, count=2, unit=1)
if type(result) == ExceptionResponse:
raise ModbusException(result)
print("Voltage: {:.2f}".format(registersToIeeeFloat(result.registers)))
time.sleep(delay) time.sleep(delay)
result = client.read_holding_registers(req.address, req.count, req.unit)
# BG-Tech, Frequency if type(result) in (ExceptionResponse):
result = client.read_holding_registers(address=0x2020, count=2, unit=1)
if type(result) == ExceptionResponse:
raise ModbusException(result) raise ModbusException(result)
print("Frequency: {:.2f}".format(registersToIeeeFloat(result.registers))) print("{0}: {1:.2f}". format(dataConverter(req.converter, result.registers)))
time.sleep(delay)
# BG-Tech, Current
result = client.read_holding_registers(address=0x2060, count=2, unit=1)
if type(result) == ExceptionResponse:
raise ModbusException(result)
print("Current: {:.2f}".format(registersToIeeeFloat(result.registers)))
time.sleep(delay)
# Hottis Thermometer, Resistance Channel 1
result = client.read_holding_registers(address=0x0004, count=2, unit=3)
if type(result) == ExceptionResponse:
raise ModbusException(result)
print("Resistance Channel 1: {:.2f}".format(registersToIeeeFloatReverse(result.registers)))
time.sleep(delay)
# Hottis Thermometer, Temperature Channel 1
result = client.read_holding_registers(address=0x000c, count=2, unit=3)
if type(result) == ExceptionResponse:
raise ModbusException(result)
print("Temperature Channel 1: {:.2f}".format(registersToIeeeFloatReverse(result.registers)))
time.sleep(delay)
# Hottis Thermometer, Resistance Channel 2
result = client.read_holding_registers(address=0x0014, count=2, unit=3)
if type(result) == ExceptionResponse:
raise ModbusException(result)
print("Resistance Channel 2: {:.2f}".format(registersToIeeeFloatReverse(result.registers)))
time.sleep(delay)
# Hottis Thermometer, Temperature Channel 2
result = client.read_holding_registers(address=0x001c, count=2, unit=3)
if type(result) == ExceptionResponse:
raise ModbusException(result)
print("Temperature Channel 2: {:.2f}".format(registersToIeeeFloatReverse(result.registers)))
except ModbusException as e: except ModbusException as e:
print("ERROR: %s" % e) print("ERROR: %s" % e)
finally:
print("-------------") print("-------------")
time.sleep(10) time.sleep(10)