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7 APPLICATION INSTRUCTIONS
7.27 Module Access Instructions
■FROMD(P)
• These instructions read (n) words of data from the buffer memory address specified by (s) in the module specified by (U/H)
or another CPU module.
• If the read data (n) is 0, no processing is performed.
• An instruction which has been executed will result in non-processing if it fails to access the target module because the
module is faulty or busy in processing.
■DFROMD(P)
• These instructions read (n)2 words of data from the buffer memory address specified by (s) in the module specified by (U/
H) or another CPU module.
• Reading word data from module
• Reading word data from another CPU module
• Reading double word data from module
• Reading double word data from another CPU module
(s) (d)
Buffer memory CPU module
(n) points
(n) words
(d)(s)
(n) points
(n) words
Device/label memoryCPU buffer memory of
another CPU module (U/H)
(s) (d)
Buffer memory CPU module
(n) × 2 points(n) × 2 words
(d)(s)
(n) × 2 points(n) × 2 words
Device/label memoryCPU buffer memory of
another CPU module (U/H)
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