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6
DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL
External device
Q series C24
Reception data read
request X3
Sequence program
6 - 10
2) Reception by received data count
If a specified receive data count is too large for the receive data storage
area, Receive buffer memory length (address: A7
words) minus 1 is used as the receive data count instead.
(Receive data storage area) > (Data length received from external device)
(Example) When 550 words of data is received through the CH1 interface
1st data
511 words
39 words
INPUT
Read data....
1st 511 words
in three parts when the CH1 interface receive area consists of
addresses 600
to 7FF
H
2nd data
472 words
78 words
Read data....
1st 39 words and
2nd 472 words
/147
, default: 512
H
H
(default value)
H
3rd data
433 words
INPUT
MELSEC-Q
117 words
INPUT
6 - 10
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Troubleshooting
