Mitsubishi Electric MELSEC iQ-R Series User Manual page 331

Performance specifications
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
■Calculation by estimation
The mark detection value during operation cycle interval is calculated by estimation. The value calculated by estimation when
the mark detection input signal is inputted is stored in the buffer memory as the mark detection data. The value is calculated
as shown in the figure below.
• [When using the DOG signal of the servo amplifier]
The detection timing is the operation cycle.
Data upper limit value
Mark detection data
Data lower limit value
Mark detection input signal
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Performance specifications
RD78G4
Up to 16
External input signal DOG and TPR1 (touch probe 1) of the servo amplifier
When using the DOG signal of the servo amplifier: Detection at leading edge/detection at trailing edge are selectable in "b4:
External command/switching signal" of "[Pr.22] Input signal logic selection"
When using TPR1 of the servo amplifier: Detection at leading edge/detection at trailing edge are selectable in "[Pr.811] Mark
detection signal detection direction setting"
Correctable within the range of -32768 to 32767 s
When using the DOG signal: operation cycle
When using the TPR1 signal: High accuracy
13 types + Optional buffer memory data (2 words)
(Feed current 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), Feed current value of command generation axis, Current value per cycle of command
generation axis)
Up to 32
Settable in the range of -2147483648 to 2147483647
Operation cycle
Mark detection
data storage
value
search engine
RD78G8
t
Estimated straight line
RD78G16
9 COMMON FUNCTIONS
9.7 Mark Detection Function
9
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