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Appendix - 37
MELSEC-Q
APPENDICES
Appendix 5 Comparisons with conventional positioning modules
Appendix 5.1 Comparisons with QD75P model
Model
Item
QD75MH1 QD75MH2 QD75MH4 QD75P
No. of control axes 1 2 4 4
No. of positioning data items 600/axis 600/axis
2-axis linear interpolation
3-axis linear interpolation
4-axis linear interpolation
Interpolation
functions
2-axis circular interpolation
Position control
Speed control
Speed-position switching
control
(INC/ABS mode)
Positioning
systems
Position-speed switching
control
Machine OPR function (OPR method)
(4 types)
Near-point dog method, Count method 1) 2)
and Data set method
(6 types)
Near-point dog method,
Stopper method 1) to 3) and
Count method 1) 2)
JOG operation
Inching operation
Manual pulse generator function
Automatic trapezoidal
acceleration/deceleration
Acceleration/
deceleration
processing
S-pattern
acceleration/deceleration
Acceleration/deceleration time Acceleration time and deceleration time setting possible (4 patterns each)
Compensation Electronic gears, backlash compensation
Error display Error LED
History data storage
(Start, error, warning)
Provided (3 types, 16 items/axis)
Data storage destination
Flash ROM
(battery-less backup)
Connected to servo amplifier
SSCNET
Upper/lower limit switch
Near-point dog signal
Pulse signal
Servo ON signal
Servo READY signal
Zero point signal
ABS function
Current value return function.
Follow up function
Electronic gears ratio
Denominator/numerator
(32 bit)
Denominator/numerator
(16 bit)
Absolute positioning system (degree)
with unlimited length feed can be
configured grantee.
Provided Improvided
No. of input/output points 32
No. of module occupied slots 1
: Possible, : Not possible