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3 DATA COMMUNICATION USING NONPROCEDURAL PROTOCOL
3.1 Receiving Data from Target Device
■Data reception when the receive data storage area < receive data length (Reception by receive
end data quantity)
If a specified receive end data quantity is bigger than the receive data storage area, the 'receive buffer memory length
designation' (Un\G167/327, default: 512) minus 1 is used as the receive end data quantity instead.
(Receive data storage area) > (Data length transmitted from the target device)
When 550 words of data is received by the CH1 interface three times on the condition that the receive area for the CH1
interface is Un\G1536 to 2047 (default value).
INPUT INPUT INPUT
1st data 2nd data 3rd data
Target device
511 words 39 words 472 words 78 words 733 words 117 words
C24
Reception data read
request (X3)
Program
Read data....
1st 511 words
Read data....
1st 39 words and
2nd 472 words
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