Specifications; Transmission Specifications - Mitsubishi MELSEC L Series User Manual

3.3 Specifications

3.3.1 Transmission specifications

Item
Modem function
Interface that can use the modem function
Linked operation between CH1 and CH2 of the Q
series C24
Communication method
Synchronization method
1
Transmission speed
Data format
Error detection
Transmission control
Data communication
Line connection (Q series C24: modem)
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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.
The transmission specifications on the Q series C24 side for use of the modem
function are as listed 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 listed in the User's Manual (Basic).
Start bit
Data bit
Parity bit
Stop bit
Parity check
Sum check code
No procedure protocol
Bidirectional protocol
MC protocol
Pre-defined protocol
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
GX Developer via a modem.
QJ71C24N
QJ71C24
LJ71C24
Available
RS-232
Not available
Full duplex communication
Asynchronous method
1200, 2400, 4800, 9600, 14400, 19200, 28800,
38400, 57600, 115200 (bps)
1
7 / 8
1 (On) / 0 (Off)
1 / 2
On (odd/even selectable) / Off
On / Off
RS · CS control / not-control (selectable)
Available
Available
Available
Not available
1:1
3 COMMUNICATIONS BY THE MODEM FUNCTION
QJ71C24N-R2
QJ71C24-R2
LJ71C24-R2
QJ71C24N-R4
Not available
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