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IM02601006E www.eaton.com B-15
IQ 150S/250S B: Modbus Map
• Record Number: The record number of the first record in the data window. Setting this value con-
trols 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 Eaton’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.
In the IQ 250S meter, when the last register in the data window is read, the record index is incre-
mented by the Records per Window.
Содержание IQ 150S
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