Mitsubishi Electric AJ71C24-S6 User Manual page 112

7.
INITIAL SETTING OF TRANSMISSION CONTROL DATA TO
BUFFER MEMORY
-
MELSEC-A
7.4.2
Specifying no-protocol receive completion data length (fixed length)
How to complete the data receive and set the data length are given below
along with asequence program example.
-
etting method
1
Butfer memory address 108H
I
Write the amount of received data
(default: 127 words)
a
(1) Set the length of data to complete the data receive in the following
ranges:
Length of data received
c
no-protocol mode buffer size (when word
units are set)
Length of data received
5
no-protocol mode buffer size x 2 (when byte
units are set)
If the received data length is larger than the no-protocol mode buffer
size, then it is automatically set equal t o the no-protocol mode buffer
size.
(2) Section 7.4.3 describes the selection of a word or byte unit for the data
length to complete data receive.
(3) If the receive-completed code is set, the read request for the received
data is transmitted when the completed code or the set data length
(whichever comes first) is received. (Xnl is ON)
(4) To read the received data by fixed length without setting the com-
pleted code, do the following setting:
1 - Write FFFFH.
b8 b7 to bO
Buffer memory address lOOH
Buffer memory address 108H
Write the length of received data
(default : 127 words)
To set the fixed length at which data receive is complete to 15 words in the case of the read
of received data only by fixed length
(Sequence Program)
(AJ71C24 I10 addresses 80 to
9F)
To specify the fixed length, write HFFFF
to buffer memory address 100H.
I
TOP H8 H I 0 8 K15 K1
Write " t 5 t o buffer memory address 108H.