Mitsubishi MELSEC Q Series Reference Manual page 456

(3)
6 - 23
Precautions when reading/writing data from/to the Q/L/QnACPU
(a) Only the devices with the same names as those found in the AnCPU,
AnNCPU, AnACPU and AnUCPU can be read/written within the device
range of AnACPU.
The following devices cannot be accessed from the external devices:
• Devices newly added to the Q/L/QnACPU
• Latch relay (L) and step relay (S)
• File register (R)
1 When the Q/L/QnACPU is used, these devices cannot be designated
as access-target devices.
(b) Special relays and special registers can be accessed in the way shown
below.
• By designating M9000 to M9255, it is possible to access SM1000 to
SM1255.
• By designating D9000 to D9255, it is possible to access SD1000 to
SD1255.
(c) To access a Universal model QCPU, the serial No. (first five digits) of the
module must be 10102 or later.
If the serial No. (first five digits) is 10101 or earlier, make access using the
QnA compatible 3E frame or 4E frame.
To access the built-in Ethernet port of the CPU module, refer to the
following.
• QnUCPU User's Manual (Communication via Built-in Ethernet Port)
6 WHEN COMMUNICATING USING THE A COMPATIBLE 1E FRAMES
1
6 - 23