RS-232C interface

1.Introduction

(1)The VTR can be operated by commands when the RS-232C interface is used. (See command table on page 79 – 81.)

(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

Circuit name

Description

 

 

 

 

1

FG

Protective ground

Frame ground

 

 

 

 

2

RXD

Received data

Data is sent to PC.

 

 

 

 

3

TXD

Transmitted data

Data is received from PC.

 

 

 

 

4

CTS

Clear to send

Shorted with pin 5.

 

 

 

 

5

RTS

Request to send

Shorted with pin 4.

 

 

 

 

6

DTR

Data terminal ready

No processing

 

 

 

 

7

SG

Signal ground

Signal ground

 

 

 

 

20

DSR

Data set ready

+ voltage output after communication enable status

 

 

 

 

2)Example of connection with controller (PC)

Using crossover cable with D-SUB 25-pin connectors

Using crossover cable with D-SUB 9-pin and 25-pin connectors

PC side

 

(D-SUB 25-pin

 

connector)

VTR side

FG

1

1

FG

TXD

2

2

RXD

RXD

3

3

TXD

RTS

4

4

CTS

CTS

5

5

RTS

DSR

6

6

DTR

SG

7

7

SG

DTR

20

20

DSR

PC side (D-SUB 9-pin connector)

RXD

2

TXD

3

DTR

4

SG

5

DSR

6

RTS

7

CTS

8

VTR side

1FG

2RXD

3 TXD

4CTS

5RTS

6DTR

7SG

20 DSR

– 76 –

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Panasonic AJ-D950 manual RS-232C interface, Introduction, Hardware specifications, External interface specifications

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