6
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6.5 Clock Function
6
FUNCTIONS
(6) Accuracy of Clock Data
The accuracy of the clock function differs with the ambient temperature, as shown
below:
(7) Comparison of Clock Data
To compare High Performance model QCPU's clock data with a sequence program,
use the DATERD instruction to read the clock data.
Since the clock data read instruction (DATERD) reads the year data in four digits, the
data can be compared by the comparison instruction without making any
modifications.
Table6.6 Accuracy of Basic model QCPU
Ambient Temperature (°C) Accuracy (Day difference, S)
0 - 3.2 to + 5.27(TYP.+ 1.98)
+ 25 - 2.57 to + 5.27(TYP.+ 2.22)
+ 55 - 11.68 to + 3.65(TYP.- 2.64)
Table6.7 Accuracy of High Performance model QCPU and Process CPU
Ambient Temperature (°C) Accuracy (Day difference, S)
0 - 3.18 to + 5.25(TYP.+ 2.12)
+ 25 - 3.93 to + 5.25(TYP.+ 1.9)
+ 55 - 14.69 to + 3.53(TYP.- 3.67)
Table6.8 Accuracy of Redundant CPU
Ambient Temperature (°C) Accuracy (Day difference, S)
0 - 3.2 to + 5.27(TYP.+ 2.07)
+ 25 2.77 to + 5.27(TYP.+ 2.22)
+ 55 - 12.14 to + 3.65(TYP.- 2.89)
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