Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1411

■Applicable devices
Operand Bit
X, Y, M, L,
SM, F, B, SB,
FX, FY
(U/H) 

(s1)
(s2) 

(d1)
(d2) 
■Control data
Operand: (s1)
Device Item
+0 Completion status
+1 Number of write data
points
*1 This is the maximum setting range in a multiple CPU system consisting of two CPU modules.
It may be less than 8192 because the number of data points that can be written varies depending on the system configuration. (
Page 1401 Another CPU Module Access Instructions)
Processing details
• In a multiple CPU system, these instructions read the data in the device specified by (s2) in the host CPU module, by the
number of write data points specified by (s1)+1, and store it in the device specified by (d1) and later in another CPU module
(U/H).
Host CPU module
(write request source)
(s1)+1
• The following figure shows an outline of operation of the D(P).DDWR and M(P).DDWR instructions.
• Outline of operation of the D(P).DDWR instructions
Sequence scan 0
DP.DDWR instruction
Multiple CPU fixed scan
communication
0.888ms
(default)
Another CPU module
OFF
Completion device (d2)
Word
J\ T, ST, C, D, W, U\G, J\,
SD, SW, FD, U3E\(H)G
R, ZR, RD
  
  
  
  
  
Description
The completion status is stored.
• 0000H: Completed successfully
• Other than 0000H: Completed with an error (error code)
Specify the number of write data points in units of words.
Another CPU module
(read target)
(s2)
END 0 END 0
Execution of
the instruction
Request signal
Data transfer
Response signal
Accept
processing
Double word Indirect
specification
Z LT, LST, LZ
LC
   
   
   
   
   
(d1)
END 0 END 0
Data transfer
ON
1 scan
12 MULTIPLE CPU DEDICATED INSTRUCTIONS
12.1 Another CPU Module Access Instructions
Constant Others
(U)
K, H E $
   
   
   
   
   
Setting range Set by

System
*1
1 to 8192 User
END 0 END
OFF
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