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APP - 34
A
PPENDICES
4) Estimate calculation
Set the estimate calculation to "Valid/Invalid" at the word device data
setting.
Estimate calculation Ring counter value
Normal data —
16-bit integer type K1 to K32767, H0001 to H7FFF
32-bit integer type
K1 to K2147483647,
H00000001 to H7FFFFFFF
Valid
Ring counter
64-bit floating-point type K2.23E-308 to K1.79E+308
Invalid —
a) Estimate calculation : Valid
Calculation for word device data in the operation cycle is estimated.
The latch data is the value estimated at the timing in which the mark
detection signal is input. The value is calculated as shown in the
figure below whether the word device data is normal data or a ring
counter. Set the ring counter value for the ring counter.
• Valid (Normal data)
Mark detection signal
Latch data
t
Word device data
Operation
cycle
Estimate line
• Valid (Ring counter)
Latch data
Operation
cycle
Mark detection si
g
nal
t
Ring counter value
Word device data
Estimate line
Note) If "Valid (Normal data)" is selected for word device data updated as a ring
counter, the latch data may not be estimated correctly.
b) Estimate calculation : Invalid
Calculation for word device data in operation cycle is not estimated.
The latch data is the word device data at the timing in which the
mark detection signal is input. The detection accuracy is the
operation cycle regardless of the mark detection signal type.
Latch data
Operation
cycle
Mark detection si
g
nal
Word device data
t