Panasonic FP7 User Manual page 47

 Flow of logging operation
STEP 1: Startup of logging operation
 The logging operation is started by any of the following methods; Tool software operation,
Instruction in a user program, and Autostart setting.
STEP 2: Data logging
 After the startup of logging operation, logging data is executed with a specified condition
once the specified trigger condition (bit device ON, cycle, or time) is met.
 A LOG folder is created in an SD memory card for the LOG number that a file name is set.
 A file "specified file name (------current------).csv" for saving logging data is created in the
LOG folder.
 Logged data is stored in the logging buffer memory (RAM) in the CPU unit once, and they
are automatically written into files in an SD memory card by the CPU unit. It is not necessary
to write them using user programs.
 After that, the CPU unit continues saving data into the same file until the file determination
condition is met.
STEP 3: File determination
 A file is determined when the specified file determination condition (bit device ON, time,
record limit) is met.
 The file determination is to rename the file "specified file name (------current------).csv"
created in STEP 2 after writing all the data stored in the buffer into the SD memory card.
 The time data of the oldest record is added to the specified file name.
Example) When the file name is Sample, and the oldest record was recorded in 12 o'clock
on April 1, 2013, it is saved as "specified file name (130401_120000).csv".
 Once the file is determined, a new file "specified file name (------current------).csv" for saving
the next logging data is created. The logging operation restarts when the logging trigger
condition is met.
STEP 4: Stop of logging operation
 The logging operation is stopped by either of instruction in user programs or tool software
operation.
 Once the logging operation stop is requested, all the data in the buffer memory in the CPU
unit is written into the file in the SD memory card and determined. When the logging
operation is conitnuing, the records logged so far are saved and the file is determined even if
the specified file determination condition has not been satisfied.
 The time data of the oldest record is added to the specified file name.
KEY POINTS

When the logging trigger setting is "Bit, Cycle or Time", the buffer memory
data is stored at the end of the scan time. In the case of Instruction, it is
stored when the SMPL instruction is executed.
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4.1 Flow of Logging Operation