Mitsubishi Electric MELSEC-A User Manual page 115

14. AJ71 UC24 MASTER STATION
M ELSEC-A
14.3.3
Maximum number of transmission points setting area
This area is used to set the maximum number of transmission points, to be
handled with remote and local stations, at 256 or 512 points.
Write 0 or other number to buffer memory at address I EH.
1
EH
I
0 or other number
( 0 :
256
points
Other
:
512 points
4
The transmission data storage procedure differs according to the set-
ting (256 or 512 points).
If the setting is changed, setting of the read and write addresses used
with the data transmission program needs to be modified.
14.3.4 Off-communication station setting area
This area is used to set slave stations to the off-communication station.
Write 0 for off-communication cancel or 1 for off-communication set to the
lower 8 bits of buffer memory at address 1 FH.
14.3.5
Communication data area
Communication data between the master and slave stations is written to the
lower
8
bits of buffer addresses 20H to 5FH.
Received data is written to addresses 20H to 3FH.
Data for transmission is written to addresses 40H to 5FH and then set to slave
stations.
This data area must be assigned to slave stations in order of station numbers
(ignoring the transmission priority) in accordance with the number of bits
specified for communication, starting at address 20H or 40H.
This is illustrated in the following example: