Mitsubishi Electric MELSEC-A User Manual page 41

3. SPECIFICATIONS
MELSEC-A
(4) Mode switching timing
(a) Mode switching from an external device
1) Switching from the dedicated protocol mode
i) Normal mode switching
.With a mode switching request (writing 101 ]H to buffer ad-
dress 119H) in the middle of data communications, the mode
will be switched (initial processing) after the data communi-
cations is completed (after transmitting data in area B (see
Section 8.3)).
Writing by CW command
1%
Section 8.9.3.)
Data in buffer memory
T i T x - J p - - - -
010[]H
020[ ]H
address 119H
@JO[ IH
. . . .
Current mode
Mode number
of
the
request to sviitch
Sequence program
External device
ii) Forced mode switching
E l
. . . . . . . . . . . . . .
Initial processing (mode switching) after transmining ACK
a: \
1
.---
.With a mode switching request (writing 8101 ]H to buffer
address 119H) in the middle of data communications, the
communications will be forced to terminate immediately to
switch the mode (initial processing).
AJ71 UC24
A171 UC24 READY signal
See Section 3.4.2.
(Xn7)
1
Writing by CW command
(Sea Section 8.9.3.)
Initial processing
AJ71 UC24 READY signal
See Section 3.4.2.
(Xn7) (Approx. 4 sec.)
External device
\
x'
. . . .
Data in buffer memory
O m I ~
810[]H O2O[]H
address I I9H
@ J 0 [
IH
. . . .
L
Current mode
L
Mode number of the
Sequence program
E /
, , L
.....--------
Q ;
\
.---
AJ71 UC24
(The AJ71UC24 does not transmit the response