9 COMMON FUNCTIONS
9.9 Mark Detection Function
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9.9
Mark Detection Function
Any data can be latched at the input timing of the mark detection signal (DI).
Also, only data within a specific range can be latched by specifying the data detection range.
The following three modes are available for execution of mark detection.
Continuous detection mode
The latched data is always stored to the first of mark detection data storage area at mark detection.
Specified number of detections mode
The latched data from a specified number of detections is stored.
The detected position for a specified number of detections can be collected when the mark detection signal is continuously
input at high speed.
Ex.
Number of detections: 3
Ring buffer mode
The latched data is stored in a ring buffer for a specified number of detections.
The latched data is always stored at mark detection.
Ex.
Number of detections: 4
Mark detection data
storage area
Mark detection signal
Storage area 1
Mark detection data
storage area
Mark detection signal
The 3rd detection
The 4th detection
and later are ignored.
Storage area 1
Storage area 2
Storage area 3
Storage area 4
Mark detection data
storage area
Mark detection signal
The 5th detection
replaces the previous
first detection.
The 4th detection
Storage area 1
Storage area 2
Storage area 3
Storage area 4
Summary of Contents for RD77MS16
Page 1: ...MELSEC iQ R Simple Motion Module User s Manual Application RD77MS2 RD77MS4 RD77MS8 RD77MS16 ...
Page 2: ......
Page 316: ...314 9 COMMON FUNCTIONS 9 4 External Input Signal Select Function Program example ...
Page 317: ...9 COMMON FUNCTIONS 9 4 External Input Signal Select Function 315 9 ...
Page 575: ...13 PROGRAMMING 13 4 Positioning Program Examples 573 13 Error reset program Axis stop program ...
Page 643: ......