Mitsubishi Electric MELSEC-A/QnA Series Handbook page 291

7
POSITIONING MODULE REPLACEMENT
*7 When the AD70 being used in the setting that the positive voltage is output when the positioning address increases (slide
switch 1 (rotation direction setting): on) is replaced with the QD73A1, the cables between the AD70 and an encoder can be
used.
When the AD70 being used in the setting that the negative voltage is output when the positioning address increases (slide
switch 1 (rotation direction setting): off) is replaced with the QD73A1, the wiring change between the AD70 and an encoder
is required.
When the AD70 is replaced with the QD73A1 whose serial number (first five digits) is "15042" or later, the cables between
the AD70 and the encoder can be used by changing the intelligent function module switch setting.
<Replacement with the QD73A1 whose serial number (first five digits) is "15041" or earlier>
• Change the wiring between the AD70 and the encoder so that each phase A and B is reversed.
Slide switch 1 of
Rotation direction
the AD70
No. of the motor and
(rotation direction
encoder
setting)
1 Same direction
OFF
2 Reverse direction
<Replacement with the QD73A1 whose serial number (first five digits) is "15042" or later>
• Set b0 (switch 3) of the intelligent function module switch to 1.
*8 The operation for the QD73A1 while the signal is off was changed from the operation for the AD70 due to the safety
consideration of when Servo READY signal is turned on.
The QD73A1 whose serial number (first five digits) is "15042" or later operates the same as the AD70 by setting b4 (switch
3) of the intelligent function module switch to 1.
Wiring between the AD70 and encoder
Phase
A
Phase
B
AD70 Encoder
Phase
A
Phase
B
AD70 Encoder
Wiring when the AD70 is replaced to the QD73A1
Phase Phase
A A
Phase Phase
B B
QD73A1
Phase Phase
A A
Phase Phase
B B
QD73A1
Phase
A
Phase
B
Encoder
Phase
A
Phase
B
Encoder
7
- 54