ProSoft Technology 5202-DFNT-MCM4 - Manual (Page 48)

MCM ♦ ProLinx Gateway Modbus Port Expander (4102/5102-MBS3-MBM)
Modbus Master/Slave Driver Manual
Page 48 of 80
ProSoft Technology, Inc.
October 16, 2009
7.1.1 Internal Slave ID
0 TO 255
This parameter defines the virtual Modbus slave address for all three slave ports
on the Port Expander. It should be set to the same value as the Slave ID of the
device attached to the gateway's Master port. Any commands received on the
slave ports, addressed to the node address entered here, will be passed by the
gateway to the slave attached to the gateway's Master port. Any response
received from the slave will be passed back through the gateway's slave port on
which it was received.
7.1.2 Protocol
RTU
ASCII
This parameter specifies the Modbus protocol version to be used on the port.
Valid Protocols are RTU and ASCII.
7.1.3 Baud Rate
This is the baud rate to be used on the Master port. It must match the baud rate
setting used by the slave that will be connected to this Master port.
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