File Transfer Status - Mitsubishi MELSEC Q series User Manual

7.4.3

File transfer status

There are five file transfer status levels:
• Transfer start
• Standby
• Transfer data overflow
• Retry
• Transfer completion (stop)
(1) Transfer start
Data logging files of each setting No. are transferred one by one. Data logging file transfer starts simultaneously
with the data logging start operation, and the special relay (Data logging file transfer execution status flag) turns
on.
SM1940
(Data logging preparation)
SM1941
(Data logging start)
SM1948
(Data logging file transfer
execution status flag)
(2) Standby
When a data logging file is newly saved during data logging file transfer, the new file enters standby. Only one
data logging file enters standby in each setting No. If a data logging file with the same setting No. as the standby
file is saved, the standby file enters transfer data overflow status. ( Page 86, Section 7.4.3 (3))
After completion of the ongoing transfer processing, a standby data logging file is started to be transferred. When
there are several standby data logging files, they are transferred in the order that they are saved in the SD
memory card.
Ex.
When a data logging file of setting No.4 is saved while data logging files are on standby in the order of
setting No.2 and setting No.3
Data logging
setting No.4
Data logging file
A newly saved data
logging file is on
standby.
Data logging
start request
Data logging setting
ON
OFF
ON
OFF
Start of data logging file transfer function
ON
OFF
Standby
Data logging
setting No.3
Data logging file
Transferred in
Last
an orderly manner
CHAPTER 7 OTHER FUNCTIONS
Transfer
completed
Data logging
setting No.2
Data logging file
First
The first saved
data logging file on
standby starts to
be transferred.
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