Emerson Smart Wireless Gateway 1410 Reference Manual page 46

Section 5: Host Integration
February 2014
Figure 5-4. Modbus Communications Page
One Modbus Address: When this option is selected, this address is used by the Gateway for
Modbus RTU communications.
Multiple Modbus Addresses: When this option is selected, a new column for address will
appear on the Modbus mapping page.
Modbus TCP Port: This is the TCP/IP port the Gateway uses for Modbus TCP (Ethernet). To
change TCP/IP port settings, see the Internal Firewall section for more details.
Baud Rate: The data rate or speed of serial communications. This setting is only required for
Modbus RTU.
Parity: This setting determines parity (none, even, or odd) to use for error checking purposes.
This setting is only required for Modbus RTU.
Stop Bits: This setting determines the number (1 or 2) of stop bits to use when ending a
message. This setting is only required for Modbus RTU.
Response delay time (ms): This setting determines how long (ms) the Gateway waits before
responding to a Modbus request. This setting is only required for Modbus RTU.
Unmapped register read response?: This is the value returned by the Gateway if the Modbus
master requests a register with no data assigned to it (empty register). It is recommended this
be set to zero fill to prevent errors.
Floating point representation: This setting determines if the Gateway uses floating point
values or integer values. There are three options for this setting.
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Float: This option uses 32 bit floating point values.
Round: This option rounds the data value to the nearest whole number.
Scaled: This option uses scaled integers to offset negative values or increase decimal
point resolution. The equation for scaled integers is:
Reference Manual
00809-0200-4410, Rev BA
Host Integration