4 AUXILIARY AND APPLIED FUNCTIONS
4.3 Mark Detection Function
105
4
• Estimate calculation
Set the estimate calculation to "Valid/Invalid" at the word device data setting.
If "Valid (Normal data)" is selected for word device data updated as a ring counter, the latch data may not be
estimated correctly.
Estimate calculation Ring counter value
Valid Normal data
Ring counter 16-bit integer type K1 to K32767, H0001 to H7FFF
32-bit integer type K1 to K2147483647, H00000001 to H7FFFFFFF
64-bit floating-point type K2.23E-308 to K1.79E+308
Invalid
(1) 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 high-speed input
request 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)
• Valid (Ring counter)
(2) 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 high-speed input
request signal is input. The detection accuracy is the operation cycle regardless of the high-speed input request signal type.
High-speed input
request signal
Latch data
Estimate line
Word device data
Operation
cycle
t
High-speed input
request signal
t
Ring counter value
Latch data
Estimate line
Word device data
Operation
cycle
High-speed input
request signal
Latch data
Word device data
Operation
cycle
t
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