Mitsubishi Electric MELSEC iQ-R Series User Manual page 325

● Processing overload count
When the event logging processing cannot catch up with the data sampling speed, the total number of times for which the
data is lacking is stored.
When processing overload occurs, the following symptoms occur.
• An event condition establishment may not be detected
• When the data condition is selected in the period setting, the satisfaction of data conditions may not be detected
• Data to be displayed with GX LogViewer is lacking
Take corrective actions by referring to the following:
Page 350 Checking sampling process time
● Unprocessed buffer size
The size of the unprocessed buffer (internal memory), which temporarily accumulates sampled data from the CPU module, is
stored. (If the size is 20, the buffer can accumulate 20 times worth of data sampling processing.)
The accumulated data are processed by the event logging processing. For details on the unprocessed buffer, refer to the
following:
Page 350 Checking sampling process time
● Unprocessed data count
The amount of data accumulated in the unprocessed data buffer is stored.
Current : The newest unprocessed data count is stored.
Maximum: The maximum value of the unprocessed data count is stored.
If the unprocessed data count reaches the unprocessed buffer size, processing overload count occurs during the next data
sampling process. When the unprocessed data count tends to increase, processing overload count may occur from the
elapsed time. Take corrective actions by referring to the following:
Page 350 Checking sampling process time
APPX
Appendix 3 Buffer Memory
A
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