Mark Detection Function - Mitsubishi Electric Q Series Programming Manual

4 AUXILIARY AND APPLIED FUNCTIONS

4.14 Mark Detection Function

QDS
Any motion control data and all device data can be latched at the input timing of the
mark detection signal. Also, 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.
1) Continuous Detection mode
The latched data is always stored at mark detection.
Operation is the same as the high-speed reading function.
Mark detection data
storage device
+0n
2) Specified Number of Detection mode
The latched data from a specified number of detections is stored.
Example) Number of detections: 3
Mark detection data
storage device
+0n
+1n
+2n
+3n
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.
Example) Number of detections: 4
Mark detection data
storage device
+0n
+1n
+2n
+3n
(Note): "n" in above figure is different depending on the data type storage device.
• 16-bit integer type
• 32-bit integer type
• 64-bit floating-point type : 4
Mark detection signal
Mark detection signal
The 3rd detection
Mark detection signal
The 4th detection
: 1
: 2
4 - 79
The 4th detection
and later are ignored.
The 5th detection
replaces the previous
first detection.