Real Time Automation, Inc.
30
1-800-249-1612
Modbus RTU Master Device Configuration
The bottom area of the Modbus RTU Master Configuration page lets you configure up to 32 external
Modbus RTU slave devices.
1)
To add additional slave connections, click the -Select- dropdown under Modbus RTU Master Device
List and select
Add Generic Slave
option.
a)
If you are configuring multiple devices click
<<
or
>>
to navigate to another device.
b)
To create a new slave with the same parameters already configured from another slave, click
the -Select- dropdown and select the
Add from Modbus RTU
X
option (where X represents the
slave you wish to copy parameters from). Once created, you can make any additional changes
needed to that new slave.
c)
To remove a device, navigate to the slave to delete using the
<<
and
>>
buttons and click the
Delete Slave
button.
d)
Click the
Save Parameters
button to save changes before restarting or going to another
configuration page.
2)
The
Enable
check box should be selected for the device.
3)
Enter a
Device Label
to identify the device within the gateway.
4)
Enter a unique Modbus RTU
Slave Address
for the device on the network.
5)
Force Function Code 15/16 for Single Writes:
Only select this if the Modbus RTU device does not
support Modbus Function Code 5/6.
6)
Enable 0-Based Addressing
: Check ONLY if the slave you are connecting to begins their register
numbering at 0 OR they specify that their device addresses are 0-based.
7)
Bit Pack
: Select the formatting of the Coil Status/Input Status. Automap will use this packing size to
map coils to/from the other protocol. The bit pack selection here should match that of the other
protocol. The starting address is considered Bit 0 and is the low-order bit.
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