Mitsubishi Electronics fx3u FIXED BUFFER COMMUNICATION (WITH THE PROCEDURE EXIST , (3) Data length setting, (4) Text (command)

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MELSEC-F
FIXED BUFFER COMMUNICATION (WITH THE PROCEDURE EXIST
CONTROL METHOD)
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(3) Data length setting
This value indicates the data size of the text (command) section.
(4) Text (command)
The format of the command/response when communicating using fixed buffers is
configured as follows.
(a) Communication using binary code
POINT
The data length can be designated in the following range:
• Communication using binary code : Maximum of 1017 words
• Communication using ASCII code : Maximum of 508 words (*1)
*1 Since data is sent/received as ASCII data, the communication data size is
approximately half of the data size when using binary code.
(L)
00H(H)
60H(L) (H) (L) (H) (L) (H) (L) (H)
Maximum of 1017 words
Subheader
(L)(H)
(L)(H)
(L)(H)
(L)(H)
Data length
setting
1 word (2 bytes)
Send/
receive
data
Data designation/
storage device
for sending/
receiving instructions
Command format
n+1
n+2
n+3
Data length
setting
n
n+