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MELSEC-F
FIXED BUFFER COMMUNICATION (WITH THE PROCEDURE EXIST
CONTROL METHOD)
6
6 - 11
(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)
00
H
(H)
60
H
(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+