Mitsubishi Electric MELSEC Q Series User Manual page 115

(10)I/O number assignment for the QD73A1
The QD73A1 occupies 48 I/O points of 2 slots.
(a) Default I/O number assignment
Set the first half to "Empty 16 points" and the second half to "Intelligent 32 points" in GX Works2.
When executing the FROM/TO instruction on the QD73A1, use the I/O number assigned to the second half (slot)
of the QD73A1.
(b) When the first half (slot) is "Empty 0 point"
At the I/O assignment in GX Works2, the 16 points in the first half can be saved by setting the first half to
"Empty 0 point".
When executing the FROM/TO instruction on the QD73A1, use the I/O number assigned to the second half
(slot) of the QD73A1.
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