Mitsubishi A Series - Page 66

3. SPECIFICATIONS
MELSEC-A
(3) Settings when the transmission control function is/is not used
These settings specify whether or not the AJ71 C24 transmission control
function uses the AJ71 C24 buffer's data communications control desig-
nation area (address 11AH).
These settings must be executed when power to the PC CPU is turned
ON, the PC CPU is reset, or the AJ71C24 mode is switched.
~ Mode Number 1 1 to4
IQ
I AtoD
See s.0.
tion 4.3.1
Communications line
422 232C
422 232C 422 232C 422 232c
232C:
NO-
Rs-232c
NO-
, Mode
idiroc-
protocol
idiroc-
Dedi-
tiond
protocol
422:
Dedicated
No-protocol
protocol16 protocolf8
protocol
Rs-422
tional
DTRIDSR control
0101 H, 0201 H, or 0301 H DC code control
set for
trans
.
Data
WOOH (default)
When
the trans-
Sion
mission control
ooo,
control
function
is not
used
See
Section
7.7.1.
(4) DTR/DSR control
Since there are no DTR/DSR signals
in the RS422 interface, when
DTR/DSR control is designated, data cannot be communicated via
the
RS-422.
MlC24
1
Can be controlled
I
(5) DC code control
(a) DCl/DC3 transmission codes and DCl/DC3 receive codes can be
controlled when executing full-duplex data communications be-
tween the AJ71 C24 and its communicating device.
Data communications cannot be controlled using DCl/DC3 codes
when executing half-duplex data communications.
(b) Avoid using DC1 to DC4 codes in the user's data.
If those codes must be used, take one of the following measures:
0 Use DTR/DSR controls.
0 Switch DC codes (see Section 7.7.2).
0 Do not use the transmission control function.
.
c
b
(.
3-25
I
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