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Appendix - 44
MELSEC-Q
APPENDICES
Appendix 9 Comparisons with conventional positioning modules
Appendix 9.1 Comparisons with A1SD71S2 model
The following shows comparisons with the conventional positioning module
A1SD71S2, centered on the QD75 specifications.
Model
Item
QD75P1
QD75D1
QD75P2
QD75D2
QD75P4
QD75D4
A1SD71S2
No. of control axes 1 2 4 2
No. of positioning data items 600/axis 400/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) (Only INC mode)
Positioning
systems
Position-speed switching
control
Machine OPR function (OPR method) (6 types)
(3 types)
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)
Acceleration/deceleration time
same
Compensation Electronic gears, backlash compensation Backlash compensation
Error display Error LED Error LED
History data storage
(Start, error, warning)
Provided (3 types, 16 items/axis) None
Data storage destination
Flash ROM
(battery-less backup)
Buffer memory
(battery backup)
No. of occupied I/O points 32 48
No. of module occupied slots 1 2
AD71TU
AD75TU
A6GPP, A6PHP
Peripheral
devices
(data setting,
etc.)
DOS/V personal computer
: Possible, : Not possible