Mitsubishi MELSEC Q Series Reference Manual page 322

Communication speed
50bps
300bps
600bps
1200bps
2400bps
4800bps
9600bps
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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
[Communication speed setting]
Bit position
Communication speed
b15 to b8
14400bps
0F
H
19200bps
00
H
28800bps
01
H
38400bps
02
H
57600bps
03
H
115200bps
04
H
230400bps
05
H
2 Transmission speed of 230400 bps is available for only CH1 of the QJ71C24N (-R2/R4) or
LJ71C24 (-R2).
3 When connecting external devices to both of two interfaces, the total of the communication speed
should be 115200 bps of less (230400 bps or less if using QJ71C24N (-R2/R4)). When
connecting an external device to either of two interfaces, the maximum of 115200 bps is available
for the interface (a maximum of 230400 bps if using QJ71C24N (-R2/R4) or LJ71C24 (-R2)). In
this case, set 300 bps for the other interface to which no external device is connected.
4 Set "00 " to the interface for which "MELSOFT connection" or "GX Developer connection" is set
H
in the mode number. The serial communication module will operate at the communication speed
set in the programming tool.
4) When the "transmission specifications switching instruction" and
"communication speed switching instruction" indicated in (b) above is
"0", designate a dummy value of "00" (ASCII code) in this section.
2 3 4
Bit position
b15 to b8
06
H
Slow down the
07
communication speed when
H
08 data cannot be
H
communicated normally due
09
H
to overrun error, framing
0A
H
error, etc. in communication
0B
H
with external devices.
0C
H
Remarks
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