Logging Function - Mitsubishi Electric MELSEC-Q series User Manual

4.12

Logging Function

Data can be collected consecutively in a set cycle and stored in the buffer memory. Using the data stored in the buffer
memory, debugging can be performed and data variation can be checked periodically.
In addition, the time-series data that are imported as logs can be checked easily.
(1) Logging function
(a) Collectable data
The following types of data can be collected.
• Digital output value
• Scaling value
(b) Number of collectable data
The maximum 5000 logging data can be stored for each channel.
(c) Collection cycle
The data can be collected in 10ms at the minimum and in 3600s at the maximum intervals.
For details on the collection cycle, refer to the following.
• Setting procedure (
(d) Storing the collected data
Logging data are stored orderly in the logging data storage area of the buffer memory, starting from the head
area.
Data to be collected
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Buffer memory
1st data
2nd data
3rd data
4th data
5th data
6th data
4999th data
5000th data
When data is stored in the 5000th
data point area, data is overwritten
from the 1st data area.