Documentation

MbusSerialClientBaseopenProtocol Method (String, Int32, Int32, Int32, Int32)

Opens a serial Modbus protocol and the associated serial port with the port parameters configured via properties

Namespace:  FieldTalk.Modbus.Master
Assembly:  FieldTalk.Modbus.Master (in FieldTalk.Modbus.Master.dll) Version: 2.15.2-eval+3d8362b4bb861c05760d48b11d303e954bb8597c
Syntax
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public int openProtocol(
	string portName,
	int baudRate,
	int dataBits,
	int stopBits,
	int parity
)

Parameters

portName
Type: SystemString
Serial port identifier (eg "COM1")
baudRate
Type: SystemInt32
The port baud rate in bps (1200 - 115200, higher on some platforms)
dataBits
Type: SystemInt32
SER_DATABITS_7: 7 data bits (ASCII protocol only), SER_DATABITS_8: 8 data bits
stopBits
Type: SystemInt32
SER_STOPBITS_1: 1 stop bit, SER_STOPBITS_2: 2 stop bits
parity
Type: SystemInt32
SER_PARITY_NONE: no parity, SER_PARITY_ODD: odd parity, SER_PARITY_EVEN: even parity

Return Value

Type: Int32
BusProtocolErrors.FTALK_SUCCESS on success or error code. See BusProtocolErrors for possible error codes.
Remarks
This function opens the serial port with a specific port settings. After a port has been opened, data and control functions can be used.
Note Note
The Modbus standard requires two stop bits if no parity is chosen. This library is not enforcing this but it is a recommended configuration.
See Also