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I/O Modbus Slave
UDP Unicast Example
For an example of the I/O UDP unicast, see the sample program,
ioudpbcast.c
, found on your CD-
ROM.
I/O Modbus Slave
If you have a Modbus serial or TCP application, it can access I/O connected to the IOLAN when the
I/O Global Modbus Slave is enabled. You must supply a unique UID for the IOLAN, as it will act as
a Modbus Slave.
I/O Global Modbus Slave is enabled. You must supply a unique UID for the IOLAN, as it will act as
a Modbus Slave.
There are three ways your Modbus Application can connect to the IOLAN to access I/O.
Modbus Serial Application Connected to the Serial Port
Your Modbus serial application can be connected right to the IOLAN serial port to access I/O.
IOLAN
Serial
PC running a
Modbus Serial
Application
UID: 15
I/O Digital
Output
Output
Power
pe
rle
rle
Modbus Serial Application Connected to the Network
If you want to access the I/O from a LAN connection, you can install TruePort on the PC running the
Modbus serial application as described in
Modbus serial application as described in
and connect to the IOLAN over
the network.
Network
IOLAN
pe
rl
e
PC running a
Modbus Serial
Application
UID: 15
I/O Digital
Output
Output
Power