Description of the interfaces
CX51x0
24
Version: 1.9
5.4.4
RS232 (N030)
The optional N030 interface provides an RS232 interface (X300). The RS232 interface is implemented on a
9-pin D-sub connector.
Fig. 14: RS232 interface X300 with pin numbering.
The maximum baud rate on both channels is 115 kbit. The interface parameters are set via the operating
system or from the PLC program.
Table 16: RS232 interface X300, pin assignment.
PIN
Signal
Type
Description
1
DCD
Signal in
Data Carrier Detected
2
RxD
Signal in
Receive Data
3
TxD
Signal out
Transmit Data
4
DTR
Signal out
Data Terminal Ready
5
GND
Ground
Ground
6
DSR
Signal in
Dataset Ready
7
RTS
Signal out
Request to Send
8
CTS
Signal in
Clear to Send
9
RI
Signal in
Ring Indicator
Limited driver support
The driver manufacturer does not support all standard functions for the interface. As a result, some
applications may not run properly under Windows.
The following API and IOCTLs are not supported:
• SetupComm
• SetCommBreak
• ClearCommBreak
• EscapeCommFunction (no support for parameters SETBREAK and CLR-BREAK)
• IOCTL_SERIAL_XOFF_COUNTER
• IOCTL_SERIAL_LSRMST_INSERT
• IOCTL_SERIAL_SET_BREAK_ON
• IOCTL_SERIAL_SET_BREAK_OFF
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