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6.3 Serial Port
External control via RS-232C is available. The MSD controls external devices externally by serial
communication with RS-232C connector. Connect control devices such as PCs and the MSD with a serial
communication cable, and then control the MSD and acquire status using commands. For character notations
of commands and configuring communication of serial terminal, see sections "9 ASCII codes" and "8.10
Serial (COM) Port Settings", respectively.
Compliance standard
Baud rate
Data bits
Parity check
Stop bit
X parameter
Flow control
Delimiter
Communication pattern
RS-232C
connector
1
6
D-sub9 pin (male)
(MSD-5404 rear panel)
[Table 6.3] Spec of serial communication
RS-232C
4800, 9600, 19200, 38400 [bps]
8, 7 [bit]
None, even, odd
1, 2 [bit]
Invalid
None
CR LF (Carriage return and line feed, 0D and 0A in hex)
Full duplex
Pin#
1
5
2
3
4
5
9
6
RTS: Request to Send
7
8
9
[Figure 6.4] RS-232C connectors and cables
MSD-5404
Signal
NC: No connection
RD: Received Data
TD: Transmitted Data
NC: No connection
GND: Ground
NC: No connection
CTS: Clear to Send
NC: No connection
21
Control unit
Signal
Cross
NC
cable
RD
TD
NC
GND
NC
RTS
CTS
NC
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