
Configuration and Use Manual
139
Modbus Interface
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7. Click
Apply
or
OK
.
8. Click
Configure > MODBUS > Registers
. The window shown in Figure 12-5 is displayed.
Figure 12-5
Modbus Registers window
9. This window is used to map Modbus register ranges to Model 3711 points or point ranges.
Map a set of Modbus register ranges for each Modbus function that you will use (see
Section 12.5.3). The Modbus register ranges can reference opcode table registers if desired
(see Section 12.4).
Parameters in this window are listed and defined in Table 12-4.
Ending History
Point
The last history point to be referenced by the history access
register.
Archive Type
• Hourly: Return hourly values from standard history.
• Daily: Return daily values from standard history.
• Extended: Return values from extended history.
Conversion
Specify the conversion code. The conversion code specifies the
datatype conversions to be applied to Modbus data before it is
sent to the host or written to the Model 3711.
Default: 0 (no conversion)
Conversion codes are listed and
defined in Table 12-5
.
Table 12-3
Modbus Configuration – History Access Registers parameters
continued
Parameter
Description
Comments
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