JVC SR-9080 appendix SA-K97U RS-232C Protocol & Commands, Txd, Rxd

9 OPTIONAL SA-K97U RS-232C INTERFACE BOARD

9-3 SA-K97U RS-232C Protocol & Commands

This section provides technical data for programmers.

Command description

To use the commands described in the following pages, prepare the VCR for communications as follows:

Transmit the command “JVC TABLE 1 ON” (F6H) to the VCR. The VCR will return “ACK” (0AH). When the operating mode is turned on, the VCR is in the “ON” status. The VCR can now receive any command described in this section. To cancel the communications mode, transmit the command “JVC TABLE 1 OFF” (F7H).

1 VCR control commands

9 OPTIONAL SA-K97U RS-232C INTERFACE BOARD
U model
After transmitting the VISS SEARCH command (18), transmit the appropriate 2-byte numeric data (from 30H to 39H), the data input command
(40H), and either FF (ABH) or REW (ACH). All commands should be transmitted separately one byte at a time with “ACK” (0AH) confirmation
from the VCR after each transmission. * Execute in the Stop mode.
(18) VISS SEARCH (B3H)	: To search for a designated alarm-input point on the tape.
The VCR starts search after returning “ACK”. When the specified point is reached, the VCR returns COMPLETION (01H). If the end or
beginning of the tape is reached before the specified point, the VCR returns NOT TARGET (05H).
This command differs from commands (16) and (17) only in that the FF (ABH) or REW (ACH) command is included separately.
2 VCR setting commands
Commands available include control of recording/playback mode setting, timelapse VCR operation mode setting, date and time setting, timer
programming, on-screen setting, and others.

5Recording/playback mode setting commands

Two commands are available. One allows you to rotate through recording/playback modes, the other permits you to directly select the

mode.

Commands (1) through (12) are (0AH) has been returned before

(1)	OPERATE ON (7BH)
(2)	OPERATE OFF (7CH)
	PLAY (3AH)
(3)	STILL (4FH)

1-byte commands. The VCR will return “ACK” (0AH) when the command is received. Confirm that “ACK” transmitting the next command.

: VCR operating mode is turned “ON”.

: VCR operating mode is turned “OFF”.

: Playback

: Pause/Still

(1)	MODE SHIFT (7DH)	: Switches from one recording/playback mode to the next each time the command is transmitted. Use the TL
		STATUS SENSE (D6H) command to check the current mode.

(2)	MODE (7EH)	Transmit 1 byte at a time with “ACK” (0AH) confirmation from the VCR after each transmission.
		: Sets recording/playback mode directly.
		After transmitting this command, transmit the appropriate 2-byte ASCII codes (from 30H to 39H) and the data
		input command (40H). Correspondence of ASCII codes with recording/playback modes is as shown below.

(4)	STOP (3FH)
(5)	FF (ABH)
(6)	REW (ACH)
(7)	REV PLAY (4AH)
(8)	TIMER ON (60H)
(9)	TIMER OFF (61H)
	OPE LOCK ON (69H)
(10)	OPE LOCK OFF (6AH)
	EJECT (A3H)
(11)	F-FIELD STEP (ADH)
(12)	R-FIELD STEP (AEH)
(13)	REC CHECK (C1H)

: Stop

: FF/Forward search in the Play mode.

: REW/Reverse search in the Play mode.

: Reverse playback at normal speed

: Timer “ON”

: Timer “OFF”

: Operation lock “ON”

: Operation lock “OFF”

: Cassette ejection

VCR returns “ACK”, and then returns CASSETTE OUT (03H) after cassette has been ejected.

: Advances the tape by one field when the VCR is in the Still mode and engages the Still mode.

If the VCR is in any other play mode, the Still mode is engaged.

: Reverses the tape by one field when the VCR is in the Still mode and engages the Still mode.

If the VCR is in any other play mode, the Still mode is engaged.

: Engages REC CHECK. (function is the same as when locally controlled on the VCR.)

Eg: To set to “L24H”.
TXD
	7EH		30H		33H		40H		Time
RXD		0AH		0AH		0AH		0AH

(	): HDR “OFF” only
*: HDR “ON” only

Mode	1st byte	2nd byte
2H	30H	30H
6H	30H	31H
(L12H	30H	32H)
*L18H	30H	32H
(L24H	30H	33H)
*24H	31H	36H
48H	30H	34H
72H	30H	35H
120H	30H	37H
168H	30H	38H
240H	30H	39H
480H	31H	31H
960H	31H	33H

Before transmitting either of the returned by the VCR.

(14)REC (CAH)

(15)REC PAUSE (CBH)

following commands ((14) or (15)), first transmit REC/DUB REQUEST (FAH), and confirm that “ACK” (0AH) is

:Starts recording. The VCR returns “ACK” (0AH).

If the cassette tape’s safety tab [REC TAB] has been removed, NAC (0BH) is returned.

•When REC PAUSE (FAH + CBH) is sent in the Record mode, the Record-Pause mode is engaged.

•When STOP (3FH) is sent in the Record mode, the Stop mode is engaged.

:Engages Record-Pause mode. The VCR returns “ACK” (0AH).

If the cassette tape’s safety tab has been removed, NAC (0BH) is returned.

•To re-start recording, transmit REC (FAH+CAH).

•To cancel Record-Pause, transmit STOP (3FH). The VCR will enter the Stop mode.

5Timelapse VCR operation mode setting commands

(1)

TL STATUS SET (86H)

: Set the timelapse VCR operation mode with 3-byte data. Send one byte at a time by checking

ACK (0AH) from the VCR.

TXD

86H

1st byte

2nd byte

3rd byte

Time

RXD

0AH

0AH

0AH

0AH

•The setting details for the first to the third bytes are shown below.

1st byte		2nd byte
BIT	When the bit is “1”	BIT	When the bit is “1”

After transmitting commands VISS FWD (16) or VISS REV (17), transmit the appropriate numeric data (1-byte ASCII codes from 30H to 39H)

and the data input command (40H).

ASCII codes “30H – 39H” correspond with the numbers “0 – 9” (ie.: 0: 30H, 1: 31H, ... 9: 39H).

Each byte of numeric data and the data input command should be transmitted separately with “ACK” (0AH) confirmation from the VCR after

each transmission. * Transmit the commands (16) and (17) in the Stop mode.

(16)

VISS FWD (B0H)

:

To advance the tape in the forward search mode to the designated alarm-input point. The alarm

(17)

VISS REV (B1H)

:

point’s 2-byte numeric data should be input after transmission of this command.

To reverse the tape in the reverse search mode to the designated alarm-input point. The alarm

point’s 2-byte numeric data should be input after transmission of this command.

Eg: To search for the 3rd alarm-input point from the current position.

TXD

B0H

30H

33H

40H

Time

RXD

0AH

0AH

0AH

0AH

Search start

01H (or 05H)

The VCR starts search after returning “ACK”. When the specified point is reached, the VCR returns COMPLETION (01H). If the end or

beginning of the tape is reached before the specified point, the VCR returns NOT TARGET (05H). (Sending either the 30H,30H or 30H,31H

command will cause the VCR to search for the 1st alarm-input point).

0	Repeat recording function ON	0	Unused
1	Unused	1	Alarm recording function ON
2	POWER ON REC mode ON	2	Unused
3	Auto rewind ON	3	Sensor recording function ON
4	Unused	4	External recording function ON
5	Series recording function ON	5	Unused
6	Tape end buzzer ON during recording	6	Unused
7	Alarm recording buzzer ON	7	Warning buzzer ON
3rd byte
BIT	When the bit is “1”

0Unused

1Summer time compensation ON

2Unused

3Unused

4HDR mode ON

5Auto record check function ON

6Unused

7Unused

58 59 (U)59