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 93 – 95.)

(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

 

 

■ Using crossover cable with D-SUB 9-pin and

 

connectors

 

 

 

 

 

 

 

25-pin connectors

 

 

PC side

 

 

 

 

 

 

 

 

 

PC side

 

 

 

 

(D-SUB 25-pin

 

 

 

 

 

 

(D-SUB 9-pin

 

 

connector)

 

 

VTR side

connector)

 

 

VTR side

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FG

1

 

 

 

 

1

 

FG

 

 

RXD

 

2

 

1

FG

 

 

 

 

 

 

TXD

2

 

 

 

 

2

 

RXD

 

 

TXD

 

3

 

2

RXD

 

RXD

3

 

 

 

 

3

 

TXD

 

 

DTR

 

4

 

3

TXD

 

RTS

4

 

 

 

 

4

 

CTS

 

 

SG

 

5

 

4

CTS

 

CTS

5

 

 

 

 

5

 

RTS

 

 

DSR

 

6

 

5

RTS

 

DSR

6

 

 

 

 

6

 

DTR

 

 

RTS

 

7

 

6

DTR

 

SG

7

 

 

 

 

7

 

SG

 

 

CTS

 

8

 

7

SG

 

DTR

20

 

 

 

 

20

 

DSR

 

 

 

 

 

 

20

DSR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

– 90 –