ProSoft Technology 5202-DFNT-MCM4 - Manual (Page 52)

MCM ♦ ProLinx Gateway Modbus Port Expander (4102/5102-MBS3-MBM)
Modbus Master/Slave Driver Manual
Page 52 of 80
ProSoft Technology, Inc.
October 16, 2009
7.2.4 Baud Rate
This is the baud rate to be used on the slave port. It must match the baud rate
setting used by the remote Master serial network that will be connected to this
slave port. Each port/network can use different baud rates, if required. It is not
necessary to have all the ports on the gateway set to the same baud rate.
To maximize the port multiplexing capability of the gateway, it is recommended, if
possible, that you set the baud rate on the Master port and on the attached slave
as high as the slave can accommodate, up to 38,400; then set the baud rate for
the gateway slave ports and remote Master networks to a lower setting. This will
help prevent multiple Masters from overloading the response capability of the
single slave and the gateway.
Enter the baud rate as a value, shown in this list.
Baud Rate Parameter Value
110 110
150 150
300 300
600 600
1200 12 OR 1200
2400 24 OR 2400
4800 48 OR 4800
9600 96 OR 9600
14,400 14, 114 OR 14400
19,200 19, 192 OR 19200
28,800 28, 288 OR 28800
38,400 38, 384 OR 38400
57,600 57 OR 576
115,200 115 OR 1152
Note: On all ProLinx gateways, data from the application port on the main board, serial Port 0, is
not buffered. Packets go directly to and from the serial chipset to the processor. This has the
potential to cause the serial communications to become erratic at baud rates above 38,400 baud.
ProLinx gateways with 4 serial ports have a separate serial interface board for serial Ports 1, 2,
and 3. These serial ports are buffered, and can handle communications up to 115,200 baud.
7.2.5 Parity
N ONE , O DD , E VEN
Parity is a simple error checking algorithm used in serial communication. This
parameter specifies the type of parity checking to use.
All devices communicating through this port must use the same parity setting.