Mitsubishi 00JCPU User Manual page 489

(4) How to check scan time
The CPU module measures current, minimum, and maximum values of the scan time.
The scan time can be checked by monitoring the special register (SD520, SD521, and SD524 to SD527).
Accuracy of each stored scan time is
Current value SD520
Minimum value SD524
Maximum value SD526
If the stored values in SD520 and SD521 are 3 and 400 respectively, the scan time is 3.4ms.
Example
0.1ms.
SD521
SD525
SD527
Stores the scan time of 1ms or less (unit: s).
Stores the scan time. (unit: ms).
Figure 10.4 Scan time storage location
CHAPTER10 CPU MODULE PROCESSING TIME
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