Mitsubishi MELSEC Q Series Handbook

2 SERIAL COMMUNICATION MODULE REPLACEMENT
2 - 5
(3) Comparison between QnA series and Q series
:Compatible, :Partial change required, ×:Incompatible
(Continued on next page)
Item
Specifications
Compat-
ibility
Precautions for replacement
QnA series Q series
AJ71QC24N
AJ71QC24N-R2
AJ71QC24N-R4
QJ71C24N
QJ71C24N-R2
QJ71C24N-R4
Interface
RS-232
RS-232 compliant
(D-Sub 25P)
RS-232 compliant
(D-Sub 9P)
The connector on the
connection cable must be
changed.
RS-422
RS-422 compliant
(D-Sub 25P)
RS-422/485 compliant
(2-piece plug-in connector socket
block)
Wiring must be changed.
RS-422/485
RS-422/485 compliant
(2-piece terminal block)
RS-422/485 compliant
(2-piece terminal block)
(2-piece plug-in connector socket
block)
Communication
using dedicated
protocol
*1
Half-duplex communication
Non-procedural
protocol
communication
Full duplex communication/Half-duplex communication
Bidirectional
protocol
communication
Full duplex communication/Half-duplex communication
Synchronization method Start stop synchronization (asynchronous method)
Transmission speed 300 to 230400 bps 50 to 230400 bps
Data format
Start bit 1
Data bit 7 or 8
Parity bit 1 (vertical parity)/none
Stop bit 1 or 2
Access cycle
Communication
using dedicated
protocol
Processing when the mounted station programmable controller CPU
performs END processing
Non-procedural
protocol
communication
Transmission can be executed at each send request,
and reception is available at all times.
Bidirectional
protocol
communication
Error
detection
Parity check Performed (odd/even)/none
Sum check Performed/none Select at parameter/user frame.
Transmission control
The Q series does not have the
RS-422 interface.
Transmission control must be
changed to the transmission
control of the interface to be
used.
Line
configuration
(connection)
RS-232 1:1
The Q series does not have the
RS-422 interface.
The interface to be used must
be changed.
RS-422 1:1 -
RS-422/485
1:1, 1:n, m:n
(n:max.32, m+n:max.32)
1:1, 1:n, n:1, m:n
(n:max.32, m+n:max.32)
DTR/DSR (ER/DR) control
RS/CS control
CD signal control
DC1/DC3 (Xon/Xoff) control
DC2/DC4 control
RS-232
Available
Available
Available
Available
RS-422
Available
N/A
N/A
Available
RS-422/485
N/A
N/A
N/A
Available

Mitsubishi MELSEC Q Series Specifications

General

Brand	Mitsubishi
Model	MELSEC Q Series
Category	Controller
Language	English