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E149701
B-16
B: Modbus Map and Retrieving Logs
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
0
Window is Ready
0xFF
Window is Not Ready
• Record Number: The record number of the first record in the data window. Setting
this value controls which records will be available in the data window.
• When the log is engaged, the first (oldest) record is "latched." This means that
record number 0 will always point to the oldest record at the time of latching,
until the log is disengaged (unlocked).
• To retrieve the entire log using auto-increment, set this value to 0, and retrieve
the window repeatedly, until all records have been retrieved.
NOTES:
• When auto-increment is enabled, this value will automatically increment
so that the window will "page" through the records, increasing by
RecordsPerWindow each time that the last register in the window is read.
• When auto-increment is not enabled, this value must be written-to
manually, for each window to be retrieved.
• Log Retrieval Data Window: The actual data of the records, arranged according to
the above settings.
B.5.4: Log Retrieval
Log Retrieval is accomplished in 3 basic steps:
1. Engage the log.
2. Retrieve each of the records.
3. Disengage the log.
B.5.4.1: Auto-Increment
In EIG's traditional Modbus retrieval system, you write the index of the block of data
to retrieve, then read that data from a buffer (window). To improve the speed of
retrieval, the index can be automatically incremented each time the buffer is read.
Summary of Contents for Shark 200
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