Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 282

7 APPLICATION FUNCTIONS
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POINT
(1) Specify the device of the other station CPU module to be read with the
READ/SREAD instruction within the range available for the host CPU module.
(Head device No. (S2) of read target of other station CPU module) + (Number
of read points - 1)
: Last device number at the host CPU module having the same device
name as (S2)
(2) Use the file register (ZR) when specifying the extended data register (D) or
the extended link register (W) that are out of area of the data register (D) or
the link register (W) on the host CPU module respectively. (excluding the
Universal model QCPU)
For calculating a area for the file register (ZR), refer to the user's manual
(Function Explanation, Program Fundamentals) of the CPU module used.
(Example) When not assigning the data register (D) of the other station CPU
module, or assigning all of the 32K points of the file register (ZR) to the
extended data register (D).
Host CPU module
D0
Data register
D12287
1 File register with 32K points or more is required for the host CPU.
(3) Number of resends ((S1)+7) requires to be set every time an instruction is
executed.
(Last device No. of host CPU module
Other station
1
CPU module
D0
Extended data
register
D12287
D12288
D32767
MELSEC-Q
)
ZR0
Specify within D0 to 12287
ZR12287
ZR12288
Specify within ZR12288 to 32767
ZR32767
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