Real Time Automation, Inc.
18
1-800-249-1612
Modbus RTU Slave Configuration
Click the
Modbus RTU Slave
button to access the configuration page.
1)
Serial Port
: Select which serial port is being used for communication. This port must be configured
on the Port Configuration page. If it has not yet been configured, it will display
Disabled
after the
Port descriptions in this dropdown.
2)
Enter a
Device Label
to identify the device within the gateway.
3)
Slave Address
: This Slave Address must be unique for all Modbus RTU slave devices on the RS485
network.
4)
Inactivity Timeout
: Amount of time the gateway will wait for a Read/Write request before issuing a
timeout.
5)
To enable data swapping, select the required
Swap Indicator
. If the bytes appear in the wrong
order, enable swapping to change the data. This swapping does
NOT
change coils and their ordering
inside the Bit Pack.
6)
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.
7)
Enable Modbus ASCII
: Enable ONLY if you want to communicate using Modbus ASCII. The master
must support Modbus ASCII.
