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CHAPTER10 CPU MODULE PROCESSING TIME
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10.1 Scan T
ime
10.1.1
S
can time structure
(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 0.1ms.
If the stored values in SD520 and SD521 are 3 and 400 respectively, the scan time is 3.4ms.
Figure 10.4 Scan time storage location
Stores the scan time of 1ms or less (unit: s).
Stores the scan time. (unit: ms).
SD520
SD524
SD526
Current value
Minimum value
Maximum value
SD521
SD525
SD527
Example
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