def __init__(self,
updatecallback,
address = 0x9d,
name = "/dev/serial0",
rate = 9600,
Parity = None,
OnePointFiveStopBits = None,
config = None,
host = None,
port = None,
modbustcp = False): # True of Modbus TCP, else if TCP then assume serial over TCP (Modbus RTU over serial)
super(ModbusProtocol, self).__init__(updatecallback = updatecallback, address = address, name = name, rate = rate, config = config)
try:
if config == None:
self.ModbusTCP = modbustcp
self.Host = host
self.Port = port
self.TransactionID = 0
self.AlternateFileProtocol = False
if host != None and port != None and self.config == None:
# in this instance we do not use a config file, but config comes from command line
self.UseTCP = True
# ~3000 for 9600 bit time * 10 bits * 10 char * 2 packets + wait time(3000) (convert to ms * 1000)
self.ModBusPacketTimoutMS = (((((1/float(self.Rate)) * 10.0) * 10.0 * 2.0) *1000.0) + 3000.0) # .00208
self.ModBusPacketTimoutMS += self.AdditionalModbusTimeout * 1000.0
if self.ModbusTCP:
self.MIN_PACKET_RESPONSE_LENGTH -= 2
self.MBUS_RES_PAYLOAD_SIZE_MINUS_LENGTH -= 2
self.MBUS_FILE_READ_PAYLOAD_SIZE_MINUS_LENGTH -= 2
self.MBUS_CRC_SIZE = 0
self.MIN_PACKET_ERR_LENGTH -= 2
if self.UseTCP:
self.ModBusPacketTimoutMS = self.ModBusPacketTimoutMS + 2000
#Starting serial connection
if self.UseTCP:
self.Slave = SerialTCPDevice(config = self.config, host = host, port = port)
else:
self.Slave = SerialDevice(name = name, rate = rate, Parity = Parity, OnePointFiveStopBits = OnePointFiveStopBits, config = self.config)
self.Threads = self.MergeDicts(self.Threads, self.Slave.Threads)
except Exception as e1:
self.LogErrorLine("Error opening modbus device: " + str(e1))
self.FatalError("Error opening modbus device.")
try:
# CRCMOD library, used for CRC calculations
self.ModbusCrc = crcmod.predefined.mkCrcFun('modbus')
self.InitComplete = True
except Exception as e1:
self.FatalError("Unable to find crcmod package: " + str(e1))
def __init__(self,
updatecallback,
address=0x9d,
name="/dev/serial0",
rate=9600,
Parity=None,
OnePointFiveStopBits=None,
config=None,
host=None,
port=None):
super(ModbusProtocol, self).__init__(updatecallback=updatecallback,
address=address,
name=name,
rate=rate,
config=config)
try:
if host != None and port != None and self.config == None:
# in this instance we do not use a config file, but config comes from command line
self.UseTCP = True
# ~3000 for 9600 bit time * 10 bits * 10 char * 2 packets + wait time(3000) (convert to ms * 1000)
self.ModBusPacketTimoutMS = (
((((1 / float(rate)) * 10.0) * 10.0 * 2.0) * 1000.0) + 3000.0
) # .00208
self.ModBusPacketTimoutMS += self.AdditionalModbusTimeout * 1000.0
if self.UseTCP:
self.ModBusPacketTimoutMS = self.ModBusPacketTimoutMS + 2000
#Starting serial connection
if self.UseTCP:
self.Slave = SerialTCPDevice(config=self.config,
host=host,
port=port)
else:
self.Slave = SerialDevice(
name=name,
rate=rate,
Parity=Parity,
OnePointFiveStopBits=OnePointFiveStopBits,
config=self.config)
self.Threads = self.MergeDicts(self.Threads, self.Slave.Threads)
except Exception as e1:
self.LogErrorLine("Error opening serial device: " + str(e1))
self.FatalError("Error opening serial device.")
try:
# CRCMOD library, used for CRC calculations
self.ModbusCrc = crcmod.predefined.mkCrcFun('modbus')
self.InitComplete = True
except Exception as e1:
self.FatalError("Unable to find crcmod package: " + str(e1))