Mitsubishi MELSEC-F User Manual page 134

6 FIXED BUFFER COMMUNICATION (WITH THE PROCEDURE EXIST
CONTROL METHOD)
6 - 11
(b) Communication using ASCII code
Data designation/
storage device
for sending/
receiving instructions
Send/
receive
data
n + data length
setting
(Example)
n+1
n+2
36 30 30 30
H H H H
Data length
(5) End codes
For more details on the end codes added to a response when communicating
using fixed buffers, see Section 11.4.1.
End codes are stored in the communication status storage area of the buffer
memory.
Command format
(H) to (L) (H) to (L)
36 30 30 30
H H H H
Subheader
Data length
n
setting
n+1 (H) (L)
n+2 (H) (L)
(H) (L)
1 word (2 bytes)
12
34
H H
56
78
H
H
30 30 30 32 31
H H H H H
(H)
Subheader
MELSEC-F
Maximum of 1016 words
(H) to (L)
ASCII-BIN conversion
(Maximum of 508 words)
32 33 34 35 36
H H H H H
(L) (H)
to
(H) to (L)
37 38
H H
(L)
to
6 - 11