Motorola V186 User Manual - Page 152

The MCP-M may be con d to periodically interrogate poll one or more RTUs

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SCADA System Components has an equivalent ModBus address according to some very simple yet rigorous rules; therefore, the database in the MCP-M may easily be read, or written to, by the SCADA Manager. The MCP-M's database is kept accurate by any combination of the communication modes discussed in the Communication chapter. If the SCADA Manager should change the contents of any database items defined as outbound (a control), that change will automatically be sent to the associated RTU. The MCP-M may be configured to periodically interrogate (poll) one or more RTUs to collect some or all of the reportable data in those RTUs and to update the MCP-M database accordingly. Multiple interrogation schedules may be defined: short time intervals for the sites with more interesting data and less often for the other sites. 148

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SCADA System Components
148
has an equivalent ModBus address according to some very simple yet rigorous rules;
therefore, the database in the MCP-M may easily be read, or written to, by the SCADA
Manager. The MCP-M’s database is kept accurate by any combination of the
communication modes discussed in the Communication chapter. If the SCADA Manager
should change the contents of any database items defined as outbound (a control), that
change will automatically be sent to the associated RTU.
The MCP-M may be configured to periodically interrogate (poll) one or more RTUs to
collect some or all of the reportable data in those RTUs and to update the MCP-M
database accordingly. Multiple interrogation schedules may be defined: short time
intervals for the sites with more interesting data and less often for the other sites.