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6. PROGRAMMING
MELSEGA
6.3.2
Data communkatbn with PC program
(1) Read and write instructions
(a) Read from AlSD71
FROM instruction: Also FROMP, DFRO, and DFROP
[Format]
I
Execution condition
I
Symbol
I
Description
1
Device
I
n1
I
Upper 2 digits of the 3-digit head I/O number to which the
AlSD71 has been
assigned (e.g. 4 when the head I/O num-
1
K , H
ber is X,Y040)
I
n2
I
Buffer head address of stored data
I
K, H
I
D
I
Head number of devices to which data will be written
1
T ,
C,
D, W, R
I
n3
I
Number of words to be
read
I
K, H
Flg. 6.4 Read lnstructlon FROM
~
~~~~
Example: To read one word from buffer memory address
600
(X axis out-
put speed) to D2 with the AlSD71 assigned to X130 to Xi 3F
and
Y
140 to Y 14F.
Execution
condition x131
(AlSD71 ready)
Flg. 6.5 Read Example
6 - 7
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