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Configuring Modbus
Modbus Slave Settings
When you have Modbus Slaves on the serial side of the IOLAN, configure the serial port to the
Modbus Gateway
profile acting as a Modbus Slave. There is only one Slave Gateway in the IOLAN,
so all Modbus serial Slaves must be configured uniquely for that one Slave Gateway; all serial
Modbus Slaves must have unique UIDs, even if they reside on different serial ports, because they all
must be configured to communicate through the one Slave Gateway.
To configure the Modbus Gateway on serial port 1, do the following:
1.
Select the
Modbus Gateway
profile for serial port 1.
2.
On the
General
tab, enable the
Modbus Slave
parameter.
3.
Still on the
General
tab, specify the
UID Range
as
6-8
as shown below:
4.
Click the
Advanced Slave Settings
button to verify that the default settings are acceptable.
EIA-422/485
Network
TCP
Modbus Slave
Modbus Slave
Modbus Master
Slave Gateway
Modbus Master
Modbus Slave
Serial Port 1
IOLAN
IP: 10.10.10.10
UID: 6
UID: 7
UID: 8