Mitsubishi MELSEC Q Series Reference Manual page 179

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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
POINT
Designate the number of access points within the following range.
For bit devices, one word access point is 16 bits and one double word access point
is 32 bits.
For word devices, one word access point is one word and one double word access
point is two words.
(1) When accessing the Q/LCPU on the station where the C24/E71 is loaded
(local station), or the QCPU on the station connected on a Q series supporting
network system (CC-Link IE Controller Network, CC-Link IE Field Network,
MELSECNET/H, MELSECNET/10, or Ethernet) (other station)
Number of access points: 1  (number of word access points +
When registering the file registers (ZR), use the formula, (number of access
points) x 2, for calculation.
For example, to register ZRs of 15 points, the number of access points is
calculated as 30 points.
(Note that the Basic model QCPU is excluded.)
(2) When accessing the QnACPU (other station), or the QCPU/QnACPU on the
station connected on a QnA series supporting network system
(MELSECNET/10, or Ethernet) (other station)
Number of access points: 1  (number of word access points +
(3) When accessing a programmable controller CPU (other station) except (1) and
(2)
Access is disabled.
number of double word access points) 192
number of double word access points) 96
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