Centrica Modbus TCP Manual del programador - Página 7
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Imprimir páginaThe map contains 5 main areas:
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Bridge date/time settings – This is where the Modbus host can set or read the Realtime
clock for the bridge. It can be used if there is no RTC server reachable by the bridge.
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Bridge information – Various bridge status data
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Sensor readings – An array of 32 slots. This is where the sensor readings are retrieved.
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Pulse Counter #1 and #2 Readings – These holds the counters for the two pulse inputs of
the bridge.
Sensor slot allocation example
The following image depicts an example of how the sensor software model works:
In the example above:
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Only two of the 32 bridge slots have been assigned to sensors.
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Slot #1 has been assigned to sensor S/N 12345678
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Slot #2 has been assigned to sensor S/N 12312312
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Slots #3-#32 have not been assigned with any sensors and remain empty.
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Whenever a sensor message from one of the two sensors (12345678 or 12312312) is
received, the sensor-data section of the table will be updated. The update will override the
previous data.
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We can also see another sensor (S/N 55555555) which is received by the bridge but has
not been allocated to any slot. This sensor data will be ignored when the bridge is in
Modbus TCP mode.
In 'PowerRadar connected mode' or 'combined mode' all sensor data is simultaneously sent
to PowerRadar regardless of the assignment.
Figure 2: Software model example