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6 Incremental Encoder Input Units
NX-series Position Interface Units User’s Manual (W524)
6-
9 Fu
nct
ion
s
6
6-
9-10 Pulse Rate Measure
m
ent
Precautions for Correct Use
The time that is set for the time window for pulse rate measurement varies within a range of
±250
μ
s. The range of variation is constant. It does not depend on the value set for the time
window.
To reduce the variation, set the average processing times and perform moving average pro-
cessing.
Additional Information
The time window is not synchronized when the NX bus I/O is refreshed.
When refreshing is performed for the NX bus I/O, the pulse rate measurement value that was
measured in the most recent time window is returned.
Average processing for the average processing times also starts from the set value that is written and it
starts when the set value is written.
When processing begins, the data that is obtained at that point is used to fill the average processing
times buffers.
Data is stored in the corresponding buffer from the 2nd cycle onward and the average value is calcu-
lated. When the buffers are full, the buffer with the oldest data is overwritten with the latest data.
If a new value is written to the Average Processing Times parameter during an average processing
operation, the average processing data up to that point is discarded and average processing is started
again from the time when the set value is written.
100 ms
100 ms
40 ms
40 ms
40 ms
Pulse rate
measurement
value
Pulse rate
measurement
value
Pulse rate
measurement
value
Pulse rate
measurement
value
The time window
is set to 100 ms.
The time window is
changed to 40 ms.
1st cycle
Data 1
Data 1
Data 1
Data 1
The data buffers are filled when average processing is started.
Содержание NX-EC0112
Страница 13: ...11 Manual Structure NX series Position Interface Units User s Manual W524...
Страница 34: ...Revision History 32 NX series Position Interface Units User s Manual W524...
Страница 36: ...Sections in this Manual 34 NX series Position Interface Units User s Manual W524...
Страница 70: ...2 Specifications and Application Procedures 2 14 NX series Position Interface Units User s Manual W524...
Страница 78: ...3 Part Names and Functions 3 8 NX series Position Interface Units User s Manual W524...
Страница 108: ...4 Installation and Wiring 4 30 NX series Position Interface Units User s Manual W524 Unit...
Страница 114: ...4 Installation and Wiring 4 36 NX series Position Interface Units User s Manual W524...
Страница 126: ...5 I O Refreshing Methods 5 12 NX series Position Interface Units User s Manual W524...
Страница 340: ...8 Pulse Output Units 8 76 NX series Position Interface Units User s Manual W524...
Страница 462: ...Appendices A 74 NX series Position Interface Units User s Manual W524...
Страница 463: ...I 1 I NX series Position Interface Units User s Manual W524 Index...
Страница 466: ...I 4 NX series Position Interface Units User s Manual W524 Index...