Mitsubishi Electric MELSEC-A User Manual page 73

7.1NITIAL SETTING OF TRANSMISSION CONTROL
DATA TO BUFFER MEMORY
MELSEC-A
esignation Methodl
7
The number ( I H to DH) of the mode to be switched is written.
f
.
The numbers from I H to DH correspond to the set Values
(1 to D) of the mode setting switch (see Section 4.3.1).
Zero (0) is stored when the AJ71UC24 starts up.
I
After switching the mode, the changed mode number is
stored here.
-
Oh W ~ t h o ~ t
a mode sw~tchmg request
1H: W ~ t h a mode swltch ng request
24. Mode swltchlng competed (wrltten by the AJ71UC24)
The forced mode switching number (IH) is written.
lesianation
E X ~ I ~ D I ~ ~
When the mode is switched from a PC CPU to mode number
1
by forced mode switching
(AJ71 UC24 1 1 0 addresses 80 to 9F)
X87 Mode switching request
+ H I
- 1
PLS
I
M O
I
T O
I H ~ I
HI19
I H X ~
1
SET
I
MI
k
K10
FROM] H8
1
HI19
I
D O
(
K1
I
WAND
1 - k
. . . . . . . . . . . . . . . .
setvaiue of the
;
I+
switched mode is mit-
:
ten to the special ap-
plications area of tte
buffer memory.
The switching request is changed
into pulses.
A forced mode switching request i z
mitten.
The mode switching flag is set.
Initial processing starts,
After initial processing is com-
pleted, the switchcompleted sigw
is read.
The data numbers to be written dif
fer depending on the communica-
tions method.
The mode switching completed in
02H is written to OOH.
The mode switching flag is reset