Mitsubishi Electric MELSEC Q Series Reference Manual page 355

● Specify devices of the target station's CPU within the range allowed for the own station CPU when writing data to the
devices with the WRITE instruction.
(Target station's start device (D1) to which data are written) + (Write points - 1)  (End device No. of own station's CPU
*1 End device No. of the device in the own station CPU, and whose device name is same as (D1)
● Specify the own station's start device (D1) within the range allowed for storing write data
When D150 and after the area in the own station's CPU has been already used
Ex.
Good example (D50 is specified to (D1).)
Own station CPU Other station CPU
D0
100 words
D99
● Use the file register (ZR) when specifying the extended data register (D) or extended link register (W) that is outside the
area of the own station CPU's data register (D) or link register (W). (Except for the Universal model QCPU)
For the calculation of the file register (ZR), refer to the following.
User's Manual (Function Explanation, Program Fundamentals) for the CPU module used
When 0K point is assigned to the data register (D) of another station (Example) When 0K point is assigned to the
Ex.
data register (D) of another station CPU, and when all 32K points of the file register (ZR) are assigned to the
extended data register (D)
Own station CPU *1
D0
Data register
D12287
*1 A file register whose capacity is 32K points or more is required for the own station's CPU.
Bad example (D100 is specified to (D1).)
Own station CPU
D0
100 words
D50
D99
D149
D150
: Data to be written with WRITE instruction
: Area already used by target station's CPU
: Duplicated area
Other station CPU
D0 ZR0
Extended
data register
D12287 ZR12287
D12288 ZR12288
D32767 ZR32767
CHAPTER 9 DEDICATED INSTRUCTIONS
Other station CPU
D100
D150
D199
Specify with D0 to 12287.
Specify with ZR12288 to 32767.
9
*1
)
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