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(6) Clock data accuracy
Accuracy of the clock data varies depending on the ambient temperature as shown below.
(7) Clock data comparison
To compare clock data in a sequence program, read the clock data with the DATERD instruction (instruction for
reading clock data).
Since the DATERD instruction reads the year data in four digits, the data can be compared by the comparison
instruction without any modifications.
Table6.8 Clock data accuracy
Ambient
temperature
()
Accuracy (Day difference, S)
Basic model QCPU
High Performance model QCPU,
Process CPU
Redundant CPU
0 -3.2 to +5.27 (TYP.+1.98) -3.18 to +5.25 (TYP.+2.12) -3.2 to +5.27 (TYP.+2.07)
+25 -2.57 to +5.27 (TYP.+2.22) -3.93 to +5.25 (TYP.+1.9) 2.77 to +5.27 (TYP.+2.22)
+55 -11.68 +3.65 (TYP.-2.64) -14.69 to +3.53 (TYP.-3.67) -12.14 to +3.65 (TYP.-2.89)
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