Download Q Corresponding Serial Communication Module User`s Manual

3 COMMUNICATIONS BY THE MODEM FUNCTION
MELSEC-Q
3.3 Specifications
This section explains the transmission specification on the Q series C24 side,
connectable modems/TA's (terminal adapter), I/O signals related to the modem
function, and buffer memory for the usage of the modem function.
3.3.1 Transmission specifications
The transmission specifications on the Q series C24 side for use of the modem
function are as shown below.
The transmission specifications between Q series C24 and a modem/TA (local station
Q series C24) that are not provided in this table are shown in User’s Manual (Basic).
Item
Modem function
QJ71C24N
QJ71C24N-R2
QJ71C24
QJ71C24-R2
Available
Interface that can use the modem function
Linked operation between CH1 and CH2 of the Q
series C24
Not available
Full duplex communication
Synchronization method
Asynchronous method
Start bit
Data format
Error detection
38400, 57600, 115200, 230400 (selectable)
1
7/8
Parity bit
1 (On) / 0 (Off)
Stop bit
1/2
Sum check code
Transmission control
—
On (odd/even selectable) / Off
On / Off
RS · CS control / not-control (selectable)
No procedure protocol
Data communication
1200, 2400, 4800, 9600, 14400, 19200, 28800,
Data bit
Parity check
Not available
RS-232
Communication method
Transmission speed (Unit: bps)
QJ71C24N-R4
Available
Bidirectional protocol
Available
MC protocol
Available
Line connection (Q series C24: modem)
1:1
1 When the first five digits of the serial No. are 03042 or earlier, the transmission
speed cannot be set to 115200 bps for connection between the Q series C24 and
the GX Developer via a modem.
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