JVC SR-L910EK Optional SA-K97U RS-232C Interface Board, SA-K97U RS-232C Protocol & Commands

10. OPTIONAL SA-K97U RS-232C INTERFACE BOARD

10-3. 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). The VCR can now receive any command described in this section. To cancel the communications mode, transmit the command “JVC TABLE 1 OFF” (F7H).

2-1 VCR control commands

10. OPTIONAL SA-K97U RS-232C INTERFACE BOARD
After transmitting the VISS SEARCH command (17), 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.
(17) VISS SEARCH (B3H)	: To search for a designated INDEX point on the tape.
The VCR starts INDEX 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 (15) and (16) only in that the FF (ABH) or REW (ACH) command is included separately.
2-2 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) OPERATE OFF (7CH)

(2)PLAY (3AH)

(3)STILL (4FH)

(4)STOP (3FH)

(5)FF (ABH)

(6)REW (ACH)

(7)REV PLAY (4AH)

(8)TIMER ON (60H) TIMER OFF (61H)

(9)OPE LOCK ON (69H) OPE LOCK OFF (6AH)

(10)EJECT (A3H)

(11)F-FIELD STEP (ADH)

(12)REC CHECK (C1H)

Before transmitting either of the returned by the VCR.

(13)REC (CAH)

(14)REC PAUSE (CBH)

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

:Stop

:FF/Forward search in the Play mode. (INDEX Search when Menu switch <INDEX SRCH> is set to ON.)

:REW/Reverse search in the Play mode. (INDEX Search when Menu switch <INDEX SRCH> is set to ON.)

:Reverse playback at normal speed

:Timer “ON”

:Timer “OFF”

:Operation lock “ON”

:Operation lock “OFF”

:Cassette ejection

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

:Engages field advance when the VCR is in the Still mode. The tape is advanced by one field in the 3H/Timelapse mode.

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

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

following commands ((13) or (14)), first transmit REC/DUB REQUEST (FAH), and confirm that “ACK” is

:Starts recording. The VCR returns “ACK”.

:Engages Record-Pause mode. The VCR returns “ACK”.

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

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

(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. (See section 2-3 (8).)

Transmit 1 byte at a time with “ACK” (0AH) confirmation from the VCR after each transmission.

(2)

MODE (7EH)

:

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.

Modes in parentheses are

available only in the Play mode.

Eg: To set to “L24H”.

Mode

1st byte

2nd byte

TXD

SP

30H

30H

7EH

30H

33H

40H

Time

(LP

30H

31H)

RXD

0AH

0AH

0AH

0AH

L12H

30H

32H

L24H

30H

33H

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.

However, if the loaded cassette’s safety tab has been removed, recording is not possible regardless of the fact that “ACK” has been
returned. Use the STATUS SENSE (D7H) command to confirm tape status. (See Section 2-3 (9)).
After transmitting commands VISS FWD (15) or VISS REV (16), 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. The VCR’s Menu switch <INDEX SRCH> is set to OFF.
(15)	VISS FWD (B0H)				: To advance the tape in the forward search mode to the designated alarm-input point. The alarm
					point’s 2-byte numeric data should be input after transmission of this command.
(16)	VISS REV (B1H)				: 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 INDEX 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).

1st byte		2nd byte
BIT	When the bit is “1”	BIT	When the bit is “1”
0	Repeat recording function ON	0	Unused
1	Unused	1	Alarm recording function ON
2	Auto 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	Index search function ON
7	Alarm recording buzzer ON	7	Warning buzzer ON
3rd byte
BIT	When the bit is “1”

0Unused

1Summer time compensation ON

2Unused

3Unused

4Unused

5Video mode set to “B/W” (black and white)

6Unused

7Unused

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