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915U-2 Wireless I/O
RS232 / RS485 Modbus TCP / RTU Converter
Pauses Between
Requests
Response Timeout
Connection Timeout
Maximum Request
Retries
Maximum
Connections
Maximum num units
to Poll
Save Changes and
Activate.
Expansion I/O
By default the RS485 port will be automatically enabled for "Expansion I/O ".
This means that when expanding the I/O all that is needed is to add the ELPRO
Expansion I/O module/s, e.g. 115S-11, 115S-12, or 115S-13 to the RS485 port and the
I/O will automatically be available from within the 915U-2's I/O store. See Appendix B:
"I/O Store Registers" for location addresses.
By default the Data Rate, Data Format will all be standard 9600, N81 and none for Flow
Control which matches the default Serial baud rate and data Format of the 115S serial
expansion module.
Serial parameters can be adjusted for compatibility or faster serial performance by
adjusting the rates and format and then selecting the "Save and Activate" Button.
Serial port parameters will also need to be changed on the expansion I/O module by
using the 115S Configuration Utility which can be downloaded from the ELPRO
Technologies Website (www.elprotech.com)
Note: Be aware that using settings other than the default will mean new
modules from the factory will require a reconfigure using the 115S configuration
utility to change these serial settings.
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Enter the delay between serial request retries in milliseconds
Enter the serial response timeout in milliseconds – a serial
retry will be sent if a response is not received within this
timeout.
Enter the TCP connection timeout in seconds – if no
Modbus/TCP data is received within this timeout then the TCP
connection will be dropped. Set this field to zero for no
timeout.
Enter the maximum number of request retries performed
serially.
Enter the maximum number of simultaneous TCP connections
to the server allowed.
This is the maximum number of slave addresses that the
Modbus Client will scan or poll for. Default is 3. If adding more
that 3 115S expansion I/O module this number will need to be
increased.
Save changes to non-volatile memory, and restarting the
function to load new configuration.
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915U-2 Wireless I/O
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