Mitsubishi Electric MELSEC-A/QnA Series - Function Comparison

7 POSITIONING MODULE REPLACEMENT
7 - 45
7.6.2 Function comparison
(1) Function comparison between the AD70 and the QD73A1
: Compatible, --: Not available
Function Description AD70 QD73A1
Precautions for
replacement
Major
positioning
control
Position
control
mode
Positioning
control
Positioning is executed from the current position to a specified
position at a specified speed.
Refer to Section
7.6.6.
Two-phase
trapezoidal
positioning
control
Positioning is executed to the address specified in
" Positioning address P1" at " Positioning speed V1",
then to the address specified in " Positioning address P2" at
" Positioning speed V2" by one positioning start signal.
Speed-position
control switch mode
Operation starts according to the positioning speed set beforehand
by one start signal, then the operation switches to position control
by Speed-position switching command signal. If the operation
stopped by Stop signal after the input of Speed-position switching
command signal, the positioning can be continued by Speed-
position mode restart signal. In addition, the positioning address
(movement amount) can be changed if it is before the input of
Speed-position switching command signal.
Refer to Section
7.6.6.
JOG operation
Positioning is executed in the specified direction at specified
speed while a JOG operation command is on. Turning on the
signal starts operation at a specified speed and speed control
operation is continued until Stop signal is input.
OPR control
A workpiece is returned to an original point following an OPR start
command from a CPU module, and the current value is corrected
to an OP address after the completion of OPR.
Multiplication setting
This function multiplies the feedback pulse frequency from the
pulse generator by 4, 2, 1, or 1/2.
Electronic gear function
This function controls moving distance and speed by multiplying
command pulse output.
Deviation counter clear function
This function clears the accumulated pulses in the deviation
counter. When the servomotor power is turned off due to an
emergency stop during positioning, clearing the accumulated
pulses in the deviation counter prevents servomotor rotation at
power recovery.
Speed change function
This function forces to change speed from a program during
positioning control or JOG operation.
Refer to Section
7.6.6.
Current value change function
This function changes the current feed value to a specified value
from a sequence program on the condition other than while BUSY.
Refer to Section
7.6.6.
In-position function
This function turns on In-position signal while the accumulated
pulse amount in the deviation counter is within the specified in-
position range. In-position signal can be used as the signal right
before positioning completion.
Zero/gain adjustment
This function adjusts analog voltage contained in accumulated
pulses.
Refer to Section
7.6.6.
Da.2
Da.3
Da.4
Da.5