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2
SERIAL COMMUNICATION MODULE REPLACEMENT
(2) Between QnAS series and L series
Item
RS-232
RS-422/485
Communication
using dedicated
protocol
Interface
Nonprocedural
protocol
communication
Bidirectional
protocol
communication
Communication
using
communication
protocol
Synchronization method
Transmission speed
Start bit
Data bit
Data format
Party bit
Stop bit
Communication
using dedicated
protocol
Nonprocedural
protocol
communication
Access cycle
Bidirectional
protocol
communication
Communication
using
communication
protocol
Parity check
Error detection
Sum check
Transmission control
RS-232
Line
configuration
RS-422/485
(connection)
QnAS series
A1SJ71QC24N1
A1SJ71QC24N1-R2
RS-232 compliant (9-pin D-sub)
RS-422/485 compliant
(2-piece terminal block)
Half-duplex communication
*1
Full-duplex communication/half-duplex communication
Full-duplex communication/half-duplex communication
-
Start stop synchronization (asynchronous method)
300 to 115200 bps
1 (vertical parity) or none
Requests are processed during the END processing of the connected
Data is sent at each send request and is received at any time.
-
Supported (odd/even)/Not supported
Supported/Not supported
DTR/DSR (ER/DR) control
RS/CS control
CD signal control
DC1/DC3 (Xon/Xoff) control
DC2/DC4 control
1:1, 1:n, m:n
(n: max. 32, m+n: max. 32)
: Compatible,
Specifications
L series
LJ71C24
LJ71C24-R2
RS-422/485 compliant
(2-piece terminal block)
Upon request by the dedicated
instruction (for both transmission
and reception)
50 to 230400 bps
1
7 or 8
1 or 2
CPU module
Upon request by the dedicated
instruction (for both transmission
and reception)
RS-232
RS-422/485
Available
Not available
Available
Not available
Available
Not available
Available
Available
1:1
1:1, 1:n, n:1, m:n
(n: max. 32, m+n: max. 32)
: Partial change required, ×: Incompatible
Precautions for
Compatibility
replacement
LJ71C24: 1ch
LJ71C24-R2: 2ch
LJ71C24: 1ch
LJ71C24-R2: None
Wiring needs to be
changed.
Select the status in
parameter or user
frame.
2
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