Mitsubishi Electric MELSEC iQ-R Series User Manual page 342

Mark detection monitor data
k: Mark detection setting No. - 1
Storage item
[Md.800] Number of mark detection
[Md.801] Mark detection data storage area 1

Mark detection data storage area 32
[Md.800] Number of mark detection
The counter value is incremented by 1 at mark detection. Preset "0" clear in "[Cd.800] Number of mark detection clear
request" to execute the mark detection in specified number of detections mode or ring buffer mode.
[Md.801] Mark detection data storage area (1 to 32)
The latch data at mark detection is stored. Data for up to 32 times can be stored in the specified number of detection mode or
ring buffer mode.
Precautions
• When the data of "[Pr.802] Mark detection data type" or "[Pr.803] Mark detection data axis No." is selected incorrectly, the
incorrect latch data is stored. For the data of "[Pr.802] Mark detection data type", set the item No. instead of specifying the
buffer memory No. directly.
• When "9: Current value per cycle after main shaft gear" or "10: Current value per cycle after auxiliary shaft gear" is set to
"[Pr.802] Mark detection data type" and the mark detection is executed right after the cam axis length per cycle is changed
during synchronous control, the data before the cam axis length per cycle is changed may be latched. At the time, the latch
data is calculated based on the executing cam axis length per cycle. Therefore, the value different from the actual output
monitor data may be latched.
• When "8: Current value after composite main shaft gear" to "12: Cam axis current value per cycle (real position)" are set to
"[Pr.802] Mark detection data type" and the mark detection is executed other than during synchronous control, the value
different from the actual output monitor data may be latched.
• If an operation cycle over occurs before or after inputting the mark detection signal, the estimation accuracy may decrease.
• When using TPR1 of the servo amplifier as the mark detection input, prevent the signal input to the servo amplifier from
turning ON/OFF multiple times within a single communication cycle. If the signal is turned ON/OFF multiple times within a
single communication cycle, the signal cannot be detected properly.
9 COMMON FUNCTIONS
340
9.7 Mark Detection Function
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Storage details/storage value
The number of mark detections is stored.
"0" clear is executed at power supply ON.
Continuous detection mode: 0 to 65535 (Ring counter)
Specified number of detection mode: 0 to 32
Ring buffer mode: 0 to (number of buffers - 1)
Refresh cycle: At mark detection
The latch data at mark detection is stored.
Data for up to 32 times are stored in the specified number of detection
mode.
Data are stored as a ring buffer for number of detections in the ring
buffer mode.
-2147483648 to 2147483647
Refresh cycle: At mark detection
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Buffer memory address
Axis 1 to axis 16
54960+80k
54962+80k
54963+80k
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55024+80k
55025+80k