50
Other Functions
Using RS-232
By connecting the RS-232 connector to a controlling device such as a computer or to a Roland video switcher, you can use the following features.
¹
Transmit commands from your controlling device to remotely control the P-20HD.
¹
Synchronize P-20HD playback and the video transition on your video switcher.
RS-232 Interface
RS-232 connector pin layout
Pin assignments
1 2 3 4 5
6 7 8 9
DB-9 type (male)
Pin No.
Signal
1
N.C.
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
N.C.
Communication standards
Communication
method
Synchronous (asynchronous),
full-duplex
Communication speed
9,600, 38,400 bps
Parity
none
Data length
8 bits
Stop bit
1 bit
Code set
ASCII
Cable wiring diagram
Use an RS-232 crossover cable to connect the P-20HD and the
controller (an RS-232-compatible computer or other device).
P-20HD
Control device
N.C.: 1
1:
RXD: 2
2: RXD
TXD: 3
3: TXD
DTR: 4
4:
GND: 5
5: GND
DSR: 6
6:
RTS: 7
7:
CTS: 8
8:
N.C.: 9
9:
(Crossover connection)
* The connections between 4 and 6 and between 7 and 8 are inside
the P-20HD.
Remotely Controlling the P-20HD from a
Controlling Device
You can remotely control the P-20HD from a controlling device such
as a computer by transmitting commands.
* For details on the commands used, refer to “Remote Control
Commands (LAN/RS-232)” (p. 69).
Getting ready
1 .
Connect the P-20HD with the controlling device
using an RS-232 crossover cable.
Settings on the P-20HD
2 .
Press the [MENU] button
Ó
“RS-232”
Ó
select “Remote
Control,” and press the [VALUE] knob.
3 .
Select “PC,” and press the [VALUE] knob.
This lets you transmit/receive commands to/from the controlling
device.
4 .
Press the [MENU] button to close the menu.
