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Operations
External Control (Serial Interface)
RS-232C
The unit can receive external control signals and
transmit status information by connecting a cross
cable on the market to the D-sub 9 pin connector for
RS-232C external control.
❖
Pin Assignment of the Connector
RS-232C
5
1
9
6
❖
RS-232C Physical Specification
Cable
Connector
Baud rate
Data bits
Parity
Stop bit
Flow control
26
1
NC
2
RX
3
TX
4
NC
5
GND
6
NC
7
NC
8
NC
9
NC
Straight-type
D-Sub 9 pin
(Female type)
9600bps
8 bits
None
1 bit
None
❖
Data Packet
A packet contains data from 5 to 8 bytes in length. In
serial communication, ASCII code from 00h to 7fh is
used. So the HEX data are converted into ASCII code
and set to the data packet. The data packet includes
CR code (0dh) at the end.
Example 1: CD Play (Code: 20 53)
[2]
[0]
[5]
32h
30h
35h
Example 2: T.SIZE (Code 20 104 08)
[2]
[0]
[1]
[0]
[4]
32h 30h 31h 30h 34h 30h 38h
The unit can identify following commands on next
page.
[3] CR code
33h
0dh
5 byte
[0]
[8] CR code
8 byte
0dh
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