Mitsubishi Electric RD77MS2 User Manual page 334

Item
Number of mark detection
settings
Input signal
Input signal detection
direction
Input signal compensation
time
Detection accuracy
Latch data
Number of continuous latch
data storage
Latched data range
Operation for mark detection function
Operations done at mark detection are shown below.
• Calculations for the mark detection data are estimated at leading edge/trailing edge of the mark detection signal. However,
when the specified number of detections mode is set, the current number of mark detection is checked, and then it is
judged whether to execute the mark detection.
• When a mark detection data range is set, it is first confirmed whether the mark detection data is within the range or not.
Data outside the range are not detected.
• The mark detection data is stored in the mark detection data storage area according to the mark detection mode, and then
the number of mark detection is updated.
■Continuous detection mode
Mark detection signal
(Leading edge detection setting)
Mark detection data value
[Md.801] Mark detection data storage area
(1 to 32)
[Md.800] Number of mark detection
[Pr.42] External command function selection
[Cd.8] External command valid
9 COMMON FUNCTIONS
332
9.9 Mark Detection Function
Performance specifications
RD77MS2 RD77MS4
Up to 16
External input signal (DI1 to External input signal (DI1 to DI20)
DI10)
Selectable for leading edge or trailing edge in logic setting of external input signal
Correctable within the range of -32768 to 32767 s
10 s
11 types + Optional buffer memory data (2 words)
(Current feed value, Machine feed value, Real current value, Servo input axis current value, Synchronous encoder axis current
value, Synchronous encoder axis current value per cycle, Current value after composite main shaft gear, Current value per
cycle after main shaft gear, Current value per cycle after auxiliary shaft gear, Cam axis current value per cycle, Cam axis
current value per cycle (real position) )
Up to 32
Settable in the range of -2147483648 to 2147483647
Confirmation of mark detection data range
0
**
"0" clear by setting "1" in "[Cd.800] Number of mark detection clear request".
0
Set "1" before mark detection start.
RD77MS8
(Upper/lower limit value setting: Valid)
Real current value
(Continuous update)
Detected real current value
Detected real current value
1
4: High speed input request
1
RD77MS16
Data outside range are not latched.
2