Intelligent Technologies Modbus to QCPort Adapter Manual
January 2006
MN05002002E (C)
For more information visit
www.eatonelectrical.com
Page 16
Serial Modbus RS485
The serial port uses the standard Serial Modbus RS485 connection, a DB9. Refer to the
figure below for details on the pin out.
Table 11: Modbus Connection
Set the Serial Modbus Address
The address and baud can only be set through the hardware. A software tool (such as
CH Studio) can view the settings for the Modbus Adapter address and baud rate, but
cannot be used to modify them.
The address is set using DIP switches on the face of the Modbus Adapter. Refer to the
following instructions, figure, and table when setting the address.
•
Moving a DIP switch to the right is
ON
and moving the switch to the left is
OFF
.
The address is in binary with the major units numbered to the right of the switch
on the label. Adding up the major units set to
ON
will provide the address of the
Modbus Adapter.
Example
: To set the address to 25, start from the top (or 128) and set the
switches from the top down to OFF, OFF, OFF, ON, ON, OFF, OFF, ON
(16+8+1=25).
Table 12: Address DIP Switch Designation
1 GND GND
5 -
B
9 +
A
5
4
3
2
1
9
8
7
6
To set the serial Modbus address, place the address DIP
switches in the desired positions.
The following example is set to address=25
128
64
32
16
8
4
2
1
ON/1
