Emerson Micro Motion 3711 Configuration And Use Manual page 146

Modbus Interface
Figure 12-4
6. This panel is used to define up to 10 history access registers. Each history access register is a
Modbus register that references a set of consecutive history points. For each history access
register that you will use, specify its Modbus register number, starting history point, ending
history point, archive type, and conversion code (see Table 12-3).
If you are unsure of your history point configuration, click
discussion of accessing history via Modbus communications, see Section 12.6.2.
Table 12-3 Modbus Configuration – History Access Registers parameters
Parameter Description
Daily Index Specify the register that contains the current index value (most
recently written) for daily history.
Hourly Index Specify the register that contains the current index value (most
recently written) for hourly history.
Extended Index Specify the register that contains the current index value (most
recently written) for extended history.
Events/Alarms Specify the register that will be used to access the event and
alarm log.
Register Number Specify the Modbus register number to be used to access the
referenced history points.
Starting History The first history point to be referenced by the history access
Point register.
138
Modbus Configuration window – History Access Registers panel
Configure > History Points
Comments
Default: 7160
Default: 7161
Default: 7162
Default: 32
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Micro Motion Model 3711 Gas Flow Computers
. For a