Detailed Descriptions of Commands

T/D SENSE (DAH+C3H)

Requests the date/time of recording. When this command is issued, the VTR returns the date/time (year/month/day/hour/minute/second in sequence) of the current playback picture in playback mode or the current date/time in other operation modes.

Example: In the case of Jan. 31, 1988, 3:10 and 58 seconds p.m.:

 

 

EXP-3

CMD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RxD

 

DAH

 

 

 

C3H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

 

 

 

0AH

 

 

 

39H

 

38H

 

30H

 

31H

 

33H

 

31H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ACK

9

8

0

1

3

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31H

 

35H

31H

 

30H

 

35H

 

38H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

5

1

0

5

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FRAME SENSE (DAH+C5H)

Requests the position on the tape of the current playback picture. When this command is issued, the VTR returns the time code data of the current playback picture and the subdata to indicate the area within the frame. The value of the subdata depends on the image quality mode, as shown below.

 

HYPER

SUPER

HIGH

MIDDLE

LOW

Subdata value

0

0 to 1

0 to 3

0 to 7

0 to 15

 

 

 

 

 

 

Example: If the time code is 01:23:45:12 and the subdata value is 3:

 

 

EXP-3

CMD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RxD

 

DAH

 

C5H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

 

 

 

0AH

 

 

 

30H

 

31H

 

32H

 

33H

 

34H

 

35H

 

31H

 

32H

 

30H

 

33H

 

 

 

 

 

 

ACK

0

1

2

3

4

5

1

2

0

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ALARM SENSE (DAH+C4H)

Requests the channel of the generated alarm. When this command is issued, the VTR returns the data shown below. Each flag is set when an alarm is generated and reset when the condition to cancel the alarm is satisfied.

 

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

byte 1

1

0

0

0

0

0

ALL CAMERAS

byte 2

CAMERA4

CAMERA3

CAMERA2

CAMERA1

byte 3

CAMERA8

CAMERA7

CAMERA6

CAMERA5

byte 4

CAMERA12

CAMERA11

CAMERA10

CAMERA9

byte 5

CAMERA16

CAMERA15

CAMERA14

CAMERA13

 

 

 

 

 

 

 

 

 

 

 

EXP-3

CMD

RxD

 

DAH

 

C4H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

 

 

 

0AH

 

 

 

80H

 

xxH

 

xxH

 

xxH

 

xxH

 

 

 

 

 

 

ACK

 

DATA DATA DATA DATA DATA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

First byte

Bits 1 and 0: Show the status of the alarm input common to all cameras.

00:No alarm input

01:Alarm generated

Second to fifth bytes

Each two bits show the status of the alarm input of the corresponding camera.

00:No alarm input

01:Alarm generated

ALARM LIST SENSE (DAH+C7H)

Requests information on the alarm list. When this command is issued with the number of the desired alarm recording on the list and ENTER (40H), the VTR returns the information (year/month/day/hour/ minute/second in sequence) of the specified alarm recording. When 0 is specified for the alarm recording number, the number of the alarm recordings on the list is returned by three bytes.

Example: When 85 alarm recordings are on the list:

 

 

EXP-3

CMD

0

 

 

ENTER

 

 

 

 

 

RxD

 

DAH

 

C7H

 

30H

 

 

 

40H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

 

 

 

0AH

 

 

 

0AH

 

 

 

0AH

 

 

 

30H

 

38H

 

35H

 

 

 

 

 

 

ACK

 

 

ACK

 

 

ACK

0

8

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Example: When alarm recording 37 was recorded on Jan. 31, 1998, 3:10 and 58 seconds, p.m.:

 

EXP-3

CMD

 

 

 

3

 

 

 

7

 

 

ENTER

 

 

 

 

 

 

 

 

RxD

 

DAH

 

C7H

 

 

 

33H

 

 

 

37H

 

 

 

40H

 

 

 

 

 

 

 

 

 

 

TxD

 

 

 

0AH

 

 

 

0AH

 

 

 

0AH

 

 

 

0AH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ACK

 

 

ACK

 

 

ACK

 

 

ACK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

39H

 

38H

 

30H

 

31H

 

33H

 

31H

 

31H

 

35H

 

 

31H

 

30H

 

35H

 

38H

 

 

9

 

8

0

 

1

3

 

1

1

5

 

 

1

0

5

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12