Initializing Display History Record Data - Omron NT21 - SETUP MANUAL 10-2001 Setup Manual

Memory Initialization

6-4-2 Initializing Display History Record Data

Reference:
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The display history record function keeps a record of the order of display of the
screens displayed during operation, and the number of times each screen is dis-
played. These records are kept only for screens for which the History attribute
has been set.
The maximum number of records is 1024 for sort by occurrence (order of display
occurrence) and 255 for sort by frequency (order of the number of times each
screen has been displayed).
Use the display history record initialization function to clear the history record
data to 0, for example when the screen data has been changed, etc. Also, if Dis-
play History (Use Ring Buffer) under History Setting of System in PT Configura-
tion (Tools) has not been checked, no more records will be stored after the maxi-
mum number of records has been kept, and therefore the records must be peri-
odically initialized. If Display History (Use Ring Buffer) is checked, when the
maximum number of records is reached the oldest record is deleted and the
newest data is recorded.
S The NT21 also allows the display history record data to be initialized by con-
trolling the PT Status Control Area from the host. For details, refer to 2-2-1 PT
Status Control Area in the Reference Manual.
S If the optional battery is not installed, the display history record data will be ini-
tialized when the PT's power is turned OFF.
Section 6-4