Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 599

12. APPLICATION OF FUNCTIONS
(5) Timing chart
Device rising position data
Device falling position data
ON
MSD (Mark detection)
OFF
MSDH
ON
(Mark detection rising latch
OFF
completed)
MSDL
ON
(Mark detection falling latch
OFF
completed)
Current position data
Note 1. When MSD (Mark detection) is assigned to the CN1-10 pin with [Pr. PD44], current position data can be obtained in high
speed (within 0.4 ms). When assigning MSD (Mark detection) to the CN1-10 pin, set "Mark detection fast input signal filter
selection" in [Pr. PD31].
2. The position data will not be changed from the previous value.
3. MSDH (Latch completed at rising edge of mark detection) turns off at the same timing as MSDL (Latch completed at falling
edge of mark detection) turns on. Set as MSDL turns on/off within the range of the latch data.
If MSD (Mark detection) was turned on again when the previous falling was out of the valid range,
MSDH (Latch completed at rising edge of mark detection) will not change, but the position data will be
updated. Refer to the following timing chart.
Device rising position data
Device falling position data
MSD (Mark detection)
MSDH
(Mark detection rising latch
completed)
MSDL
(Mark detection falling latch
completed)
Current position data
0
0
0.4 ms or longer
Within 5 ms (Note 1)
Within 3 ms
Within 3 ms
A
0
0
Disabled
ON
OFF
ON
OFF
Not changed
ON
OFF
A
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A
B
Disabled Disabled
(Note 2) (Note 2)
Within 5 ms (Note 1)
(Note 3)
Not changed Not changed
B
D
C
A
Not changed
B
C
E
F
Latch data range
Upper limit value
E
F
Latch data range
Lower limit value
C
D
Latch data range
Upper limit value
Latch data range
D
Lower limit value