System Management Information Relating To Logging Function; System Management Information And Operation; Clearing Management Information - Panasonic FP0H User Manual

Logging Operation
4.3 System Management Information Relating to Logging
Function

4.3.1 System Management Information and Operation

• Files are managed in the PLC as follows. The PLC performs operations based on the stored
management information even if an SD memory card is removed during logging, and
another SD memory card in different conditions from the conditions managed in the PLC is
inserted.
• Writing data into an undetermined file "specified file name (------current------).csv" is executed
every time specified records are stored. The number of written records can be confirmed in
the special data registers (DT90640 to DT90643).
• The number of determined files (generations) of determined files is managed during the
logging operation. The number of determined files can be confirmed in the special data
registers (DT90660 to DT90663).
• When the file is determined, the determined date is managed in the internal memory. The
time data of the oldest file is stored in the special data registers (DT90680 to DT90687). The
clock data is the number of seconds accumulated from 00:00:00 on January 1, 2001.

4.3.2 Clearing Management Information

 Clearing management information
Log file management information of the PLC is cleared in the following cases.
• When LOG n settings are deleted or all log settings are initialized from the tool software
FPWIN GR7
• When a buffer allocation different from stored data is downloaded, all log settings are
initialized.
• When a LOG n definition different from stored data is downloaded, only the different LOG n
is cleared.
KEY POINTS
•
If the above clearing operation is performed, log file management
information is initialized, and files remained in the SD memory card are
regarded as non-existent. Delete files beforehand, and use it.
•
When restarting logging with the same condition without changing the
settings, the operation continues with the previous system information, the
number of generations and the oldest time data of the file. After restarting
logging, the number of generations is added to the data before the restart,
and the existing value is held for the oldest time data.
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