User's Manual

Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 1.4.0 www.cooperbussmann.com/wirelessresources 33
Destination Register Enter the starting I/O register number in the destination device

that the Modbus mapping will transfer I/O to/from.
Device ID Enter the Modbus Device ID of the destination device

Comms Fail Register Enter the onboard local I/O Register number to store the

communication status for the specified mapping. The register will be set to 0 if
communications is successful, 0xFFFF if there is no connection to the specified server,
or 0xFFxx where xx is the Modbus Exception Code (see Appendix E - for more
information on Exception codes)
Save Changes and
Activate
Save changes to non-volatile memory and activate the process
Expansion I/O
Port Type
Select Expansion I/O from the drop down list.
Data Rate
Serial Data Rate will need to be configured to match that of the serial device that is connected
and communicating via the port. Baud rates available from 110 to 230400 baud.
Data Format
Serial Data Format defines the number of data bits, parity and start/stop bits that is used to
communicate with the serial device.
Flow Control
Flow Control is used by some serial devices to regulate the flow of data by turning on/off flags
that are used to tell the connected serial devices to start or stop transmitting data. The RS232
supports CTC/RTS hardware flow control.
Maximum Device
ID to Poll
The maximum number of Modbus address that will be polled on the serial interface. The default
for RS232 is one and three addresses will be polled on the RS485.
Save Changes and
Activate
Save changes to non-volatile memory and activate the process
Modbus RTU Slave
Port Type
Select Modbus RTU Slave from the drop down list.
Data Rate
Serial Data Rate will need to be configured to match that of the serial device that is connected
and communicating via the port. Baud rates available from 110 to 230400 baud.
Data Format
Serial Data Format defines the number of data bits, parity and start/stop bits that is used to
communicate with the serial device.
Flow Control
Flow Control is used by some serial devices to regulate the flow of data by turning on/off flags
that are used to tell the connected serial devices to start or stop transmitting data. The RS232
supports CTC/RTS hardware flow control.
Modbus Slave
Device ID
Address of the onboard Modbus RTU Slave/TCP Server. This is the Address that will be polled
by an external Modbus Master / TCP Client. Default address is 255 and can be set here or on
the Modbus TCP page.
Save Changes and
Activate
Save changes to non-volatile memory and activate the process