Rs-232C Interface - Panasonic DVC PRO Studio AJ-D950P Service Manual

RS-232C interface

1. Introduction
(1) The VTR can be operated by commands when the RS-232C interface is used.
(See command table on pages 80 – 82.)
(2) Conditions for acknowledging commands from RS-232C interface
The front panel REMOTE/LOCAL switch must be at REMOTE.
The setup menu item No. 204 "RS232C SEL" must be ON.
If the above conditions are not met, [ACK] + [STX]ER001[EXT] is returned to the external unit.
Whether the [ACK] code is returned depends on the setting which has been selected for setup menu item No. 209
"RETURN ACK".
2. Hardware specifications
External interface specifications
1) Connector specifications
Connector: D-SUB 25-pin (crossover cable supported)
Pin No. Signal
1
2 RXD
3
4
5
6
7
20 DSR
2) Example of connection with controller (PC)
Using crossover cable with D-SUB 25-pin
connectors
PC side
(D-SUB 25-pin
connector)
FG 1
TXD 2
RXD 3
RTS 4
CTS 5
DSR 6
SG 7
DTR 20
Circuit name
FG Protective ground
Received data
TXD Transmitted data
CTS Clear to send
RTS Request to send
DTR Data terminal ready
SG Signal ground
Data set ready
VTR side
1
2
3
4
5
6
7
20
Frame ground
Data is sent to PC.
Data is received from PC.
Shorted with pin 5.
Shorted with pin 4.
No processing
Signal ground
+ voltage output after communication enable status
Using crossover cable with D-SUB 9-pin and
25-pin connectors
PC side
(D-SUB 9-pin
connector)
FG RXD 2
RXD TXD 3
TXD DTR 4
CTS SG 5
RTS DSR 6
DTR RTS 7
SG CTS 8
DSR
– E-77 –
Description
VTR side
1
2
3
4
5
6
7
20
FG
RXD
TXD
CTS
RTS
DTR
SG
DSR