Ad70D - Mitsubishi Electric MELSEC-A/QnA Series Handbook

7
POSITIONING MODULE REPLACEMENT
Production
discontinuation
QD75P4N
collector is connected)
Positioning
AD75P3-S3
QD75D4N
module
differential driver is
connected)
*1 The QD75PN and QD75DN are the upward-compatibility for the QD75P and QD75D and their programs are the
same when they are replaced.
Change the sequence program as necessary with checking the processing timing, because performances such as the
starting time and data update cycle are improved.
*2 When the AD70 being used in the setting that the negative voltage is output when the positioning address increases is
replaced with the QD73A1, the wiring change between the AD70 and an encoder is required. For details, refer to Section
7.6.6.

7.2 AD70D

No Q series alternative model is available. Consider mounting the existing module on the QA6B
extension base unit or shifting to the QD75M system.
7.3 AD72
No Q series alternative model is available.
Consider mounting the existing module on the QA6B extension base unit, replacing with two QD73A1
modules, or shifting to the QD75 system.
Note that with two QD73A1 modules after the replacement, the interpolation function cannot be
performed.
*1
1) External wiring
(when an open
2) Number of slots
3) Program
*1
(when a
4) Performance specifications change: Not changed.
5) Function specifications: Partly changed
Transition to Q series
: Connector and manual pulsar wiring are changed.
: Not changed
: I/O signals, XY assignment, buffer memory assignment
and different functions are changed.
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