Mitsubishi MELSEC Q series User Manual page 24

(4) Only the specific data can be collected in each file (specification period
logging).
Using the specification period logging (Page 61, Section 6.3.3), data can be collected only while the specific
conditions are met, and files can be saved for each specified period.
Capacity increase resulting from collecting unnecessary data can thus be prevented, and time taken to analyze
and organize data can also be shortened. Even when the conditions change, all data that meet the changed
conditions can be collected.
Furthermore, together with the data logging file name addition instruction (SP.LOGFILES) (Page 175,
Section 11.3), the specification period logging allows any character to be added to the data logging results for
each specified period, facilitating the control of data logging files.
<Operation of the
specification period logging>
Data collection period: M0
Data collection timing: Each
scanning cycle
When the SP.LOGFILES instruction
is simultaneously used
Remark
The specification period logging is available only for the High-speed Universal model QCPU and the Universal model
Process CPU. Before using the specification period logging, check the versions of the CPU module and configuration tool
used. ( Page 190, Appendix 2)
22
Only the data logging results collected
under the specific conditions can be stored.
ON
Logging start
Period Ò
Saved files 00000001.CSV 00000002.CSV 00000003.CSV
ON
"ABC"
ABC_00000001.CSV ABC_00000002.CSV ABC_00000003.CSV DEF_00000004.CSV
Any string can be added to saved file
names for each specified period.
Configuration tool
ON ON
Period Ó Period Ô
OFF OFF
00000004.CSV
ON ON
"GHI"
"DEF"
QnUDVCPU
SD memory card
OFF
00000005.CSV
GHI_00000005.CSV