Panasonic Digital Video Cassette Recorder Ajd850 Operating Instructions

							Ð 91 Ð
SERVO CONTROL
ERROR
Counter display DescriptionVTR operation(Restart condition)
REEL DIR UNMATCHIf the reel motor at the take-up side is running in the 
reverse direction, the AUTO OFF lamp lights, and the 
message display flashes.STOP
(POWER OFFàON)
REEL TENSION ERROR
SERVO COMM ERROR
SERVO ERROR
S-FF/REW TIMEOVER
S REEL ROTA TOO
FAST
T REEL ROTA TOO
FAST
T REEL TORQUE
ERROR
UNLOAD ERROR S REEL TORQUE
ERROR
WINDUP ERROR
If an abnormal tension at the supply side is detected 
in the reel mode, the AUTO OFF lamp lights, and the 
message display flashes.STOP
(POWER OFFàON)
When the servo microcomputer does not follow the 
instructions of the system control microcomputer 
even when 10 seconds have elapsed, the AUTO OFF 
lamp lights, and the message display flashes.STOP
(POWER OFFàON)
When there is no response from the servo micro-
computer for 1 or more seconds, the AUTO OFF 
lamp lights, and the message display flashes.STOP
(POWER OFFàON)
When only the servo microcomputer was reset in an 
instantaneous power failure, the AUTO OFF lamp 
lights, and the message display flashes.STOP
(POWER OFFàON)
If the start/end processing operation is not completed, 
the AUTO OFF lamp lights, and the message display 
flashes.STOP
(POWER OFFàON)
If the supply reel motor should rotate at an ab-
normally fast rate, the AUTO OFF lamp lights, and 
the message display flashes.STOP
(POWER OFFàON)
If an abnormal torque applied to the supply reel motor 
is detected, the AUTO OFF lamp lights, and the 
message display flashes.STOP
(POWER OFFàON)
If the take-up reel motor should rotate at an ab-
normally fast rate, the AUTO OFF lamp lights, and 
the message display flashes.STOP
(POWER OFFàON)
If an abnormal torque applied to the take-up reel 
motor is detected, the AUTO OFF lamp lights, and 
the message display flashes.STOP
(POWER OFFàON)
If the tape has not been wound up during unloading, 
the AUTO OFF lamp lights, and the message display 
flashes.STOP
(POWER OFFàON)
If the tape was not wound up at less than the 
standard speed (1´) when the total tape amount was 
not detected or if abnormal tape slack or tension was 
detected at speeds above 1´ after the total tape 
amount was detected, the AUTO OFF lamp lights, 
and the message display flashes.
STOP
(POWER OFFàON)
WINDUP REEL NOT
ROTAIf, after the cassette has been inserted, the tape take-
up reel has not wound up the tape at the standard 
speed (1´) or faster while the total tape amount is not 
detected and while the tape is traveling in the forward 
or reverse direction, the AUTO OFF lamp lights, and 
the message display flashes.
STOP
(POWER OFFàON)
Monitor display
SERVO CONTROL
ERR REEL DIR UNMATCH
REEL TENSION ERROR
SERVO COMM ERROR
SERVO ERROR
S-FF/REW TIMEOVER
S REEL TOO FAST
T REEL TOO FAST
T REEL TORQUE
ERR
UNLOAD ERROR S REEL TORQUE
ERR
WINDUP ERROR
W-UP REEL NOT ROTA 
						

							RS-232C interface
Ð 92 Ð
1. Introduction
(1) The VTR can be operated by commands when the RS-232C interface is used.
(See command table on pages 95 Ð 97.)
(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 ÒRS232C SELÓ 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
ÒRETURN ACKÓ.
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)
nUsing crossover cable with D-SUB 25-pinnUsing crossover cable with D-SUB 9-pin and
connectors 25-pin connectors
PC side
(D-SUB 25-pin
connector)
FG
TXD
RXD
RTS
CTS
DSR
SG
DTR1
2
3
4
5
6
7
20
VTR side
FG
RXD
TXD
CTS
RTS
DTR
SG
DSR 1
2
3
4
5
6
7
20
PC side
(D-SUB 9-pin
connector)
RXD
TXD
DTR
SG
DSR
RTS
CTS2
3
4
5
6
7
8FG
RXD
TXD
CTS
RTS
DTR
SG
DSR 1
2
3
4
5
6
7
20
VTR side 
						

							Ð 93 Ð
3. Software specifications
Protocol
1) Communication parameters
Communication system Asynchronous, full duplex
Communication speed 300/600/1200/2400/4800/9600
Bit length 7 bit/8 bit
Stop bit1 bit/2 bit
Parity bitNONE/ODD/EVEN
ACK code ACK code returned/ACK code not returned

The ACK code is what is returned from the VTR to the controller when data has
been successfully sent from the controller.
The underlining indicates the factory settings.
Any changes to the settings can be made using the setup menu items listed below.
Communication parameter Setup menu item
Communication speed No. 205 BAUD RATE
Bit length No. 206 DATA LENGTH
Stop bit No. 207 STOP BIT
Parity bit No. 208 PARITY
ACK code No. 209 RETURN ACK
2) Send format [controller (PC) ® VTR]
n Data format
[STX] [command] [:] [data] [ETX]
02h XX XX XX 3Ah XX-XX 03h¬(ASCII code: symbols, numbers upper-case letters)
20h
						

							RS-232C interface
Ð 94 Ð
3) Return format [VTR ® controller (PC)]
The following responses are made to the command. If necessary, more than one response is made.
n When the communication has terminated normally
1. The receive completion message is returned.
[ACK]
06h
2. The execution completion message is returned.
[STX] [command] [data] [ETX]
02h XX XX XX XX-XX 03h
¥ [command]: This is the message (data) which is returned or the execution completion message identifier.
¥ [data]: This is the data to be returned. It can be omitted.
Example: Send command Return message (data)
[STX] OPL [ETX]®[ACK] [STX] OPL [ETX]
n When the communication has terminated abnormally
[NACK]
15h
n When processing is not possible due to incorrect data or trouble in the VTR
1. The receive completion message is returned.
[ACK]
06h
2. An error code is returned.
[STX] E R N
1 N2 N3[ETX]
02h Error code 03h
4. Error code table
ER001: Invalid command
¥ Unsupported command received.
¥ Error in command execution
ER002: Parameter error
ER102: VTR mode error (front loading motor)
ER103: VTR mode error (loading motor)
ER104: VTR mode error (drum, capstan system)
ER105: VTR mode error (reel system)
ER106: VTR mode error (tension system)
ER108: VTR dew error
ER1FF: VTR system error 
						

							Ð 95 Ð
VTR
operationSend commandReturn (completion)
messageSupplementary notes
[STX] OSP [ETX] STOP
[STX] OSP [ETX]This command is for stopping the tape travel.
The resulting output picture and sound statuses 
differ according to the settings selected for the setup 
menu No. 105 (AUTO EE SEL).
[STX] OEJ [ETX] EJECT [STX] OEJ [ETX]This command is for ejecting the cassette tape.
The resulting output picture and sound statuses 
differ according to the settings selected for the setup 
menu No. 105 (AUTO EE SEL).
[STX] OPL [ETX] PLAY [STX] OPL [ETX]This command is for starting playback.
[STX] ORW [ETX] REWIND [STX] ORW [ETX]This command is for rewinding the tape.
The resulting output picture and sound statuses 
differ according to the settings selected for the setup 
menu No. 105 (AUTO EE SEL).
The maximum tape speed differs according to the 
setting selected for setup menu No. 102 (FF. REW 
MAX).
[STX] OFF [ETX] FAST
FORWARD[STX] OFF [ETX]This command is for fast forwarding the tape.
The resulting output picture and sound statuses 
differ according to the settings selected for the setup 
menu No. 105 (AUTO EE SEL).
The maximum tape speed differs according to the 
setting selected for setup menu No. 102 (FF. REW 
MAX).
[STX] ORC [ETX] REC [STX] ORC [ETX]This command is for starting the recording.
[STX] OSF:data [ETX] SHTL
FORWARD[STX] OSF [ETX]This is the forward direction shuttle command.
data = n:
0:
1:
2:
3:
4:
5:
6:
7:
8:
9:
A:speed data
STILL
´0.03
´0.1
´0.2
´0.5
´1
´1.85
´4.1
´9.5
´16
´32(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),´0.03
´0.1
´0.3
´0.5
´1
´1.85
´3.1
´9.5
´16
´32(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM) :
(DV, DVCAM) :This speed differs according to the setting 
selected for setup menu No. 101 (SHTL MAX).
This speed differs according to the setting 
selected for setup menu No. 101 (SHTL MAX).
5. Command table
(1) Commands relating to operation control

¥ As for the return (completion) message, [ACK] is first returned when data is received, and the execution message is
subsequently returned. It is only the execution message which is listed in this table.
¥ In the case of commands not listed in the table, ER001 (invalid command) is returned after [ACK] has been returned. 
						

							RS-232C interface
Ð 96 Ð
VTR
operationSend commandReturn (completion)
messageSupplementary notes
[STX] OBF [ETX] STANDBY
OFF[STX] OBF [ETX]This command is setting the VTR to standby OFF.
[STX] OSR:data [ETX] SHTL
REVERSE[STX] OSR [ETX]This is the reverse direction shuttle command.
data = n:
0:
1:
2:
3:
4:
5:
6:
7:
8:
9:
A:speed data
STILL
´0.03
´0.1
´0.2
´0.43
´1
´1.85
´4.1
´9.5
´16
´32(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),
(DVCPRO),´0.03
´0.1
´0.3
´0.5
´1
´1.85
´3.1
´9.5
´16
´32(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM)
(DV, DVCAM) :
(DV, DVCAM) :This speed differs according to the setting 
selected for setup menu No. 101 (SHTL MAX).
This speed differs according to the setting 
selected for setup menu No. 101 (SHTL MAX).
[STX] OBN [ETX] STANDBY
ON[STX] OBN [ETX]This command is setting the VTR to standby ON. 
						

							Ð 97 Ð
VTR
operationSend commandReturn (completion)
messageSupplementary notes
[STX] QCD [ETX] CTL/TC
DATA
REQUEST
[STX] CD data [ETX]This command is for inquiring about the counter 
value.
[STX] QOP [ETX] STATUS
REQUEST[STX] xxx [ETX] data =  f w gh mm ss ff
f
w
gh
mm
ss
ff= F
= S
=
CTL:
TC:
=
=
=g =
h =
gh =SP (20h):
– (2Dh):
0 – 9: hours
00 – 23: hours
00 – 59: minutes
00 – 59: seconds
00 – 29: framesfor a plus display
for a minus display
CTL or TC is returned,
whichever corresponds
to the front display
mode.
This command is for inquiring about the VTR’s oper-
ation mode.
xxx = 
data = AJ-D850OEJ:
OFF:
OPL:
ORC:
ORW:
OSP:
SRS:
OBF:
OSF:
OSR:
OJG:
OSW:
EAE:
EON:
EPV:
ERV:EJECT
FAST FORWARD
PLAY
REC
REWIND
STOP (including the STANDBY ON)
(IN/OUT) PREROLL
STANDBY OFF
SHTL FORWARD
SHTL REVERSE
JOG FORWARD/REVERSE
VAR FORWARD/REVERSE
AUTO EDIT
EDIT ON (MANUAL EDIT)
PREVIEW
REVIEW
[STX] QID [ETX] ID (VTR No.)
REQUEST[STX] data [ETX]This command is for inquiring about the VTR used.
(2) Commands relating to inquiries

¥ As for the return (completion) message, [ACK] is first returned when data is received, and the execution message is
subsequently returned. It is only the execution message which is listed in this table.
¥ In the case of commands not listed in the table, ER001 (invalid command) is returned after [ACK] has been returned. 
						

							RS-232C interface
Ð 98 Ð
(3) Microsoft QuickBASIC sample program
CLS
STX$ = CHR$(&H2): ETX$ = CHR$ (&H3): NAK$ = CHR$(15): ACK$ = CHR$(&H6)
PRINT *** RS-232C COMMUNICATION SAMPLE PROGRAM ***
PRINT Type Command QUIT to quit.
PRINT
REM *** Communication Port Initial & Open ***
REM Port 1,9600Bps,No parity,8 bit data,1 stop bit
OPEN COM1:9600,N,8,1 FOR RANDOM AS #1 LEN = 256
REM *** Input Command & Send Command ***
SendCmd:
INPUT Input Command =; SEND$
IF SEND$ = QUIT THEN GOTO ProgEnd
PRINT #1, STX$ + SEND$ + ETX$
REM *** Wait for Receive Command ***
WHILE LOC(1) = 0
        WAITKEY$ = INKEY$
        IF WAITKEY$ = Q THEN PRINT *** Quit ***: GOTO ProgEnd
WEND
REM *** Receive Command ***
RecvCmd:
RECV$ = INPUT$(1, #1)
IF RECV$ = STX$ THEN RECV$ = [Stx]
IF RECV$ = ACK$ THEN RECV$ = [Ack]
IF RECV$ = NAK$ THEN RECV$ = [Nak]
IF RECV$ = ETX$ THEN BUFFER$ = BUFFER$ + [Etx]: GOTO DispOut
BUFFER$ = BUFFER$ + RECV$
GOTO RecvCmd
REM *** Output Receive Command ***
DispOut:
PRINT Receive Command =; BUFFER$
PRINT
BUFFER$ = 
GOTO SendCmd
REM *** End Program ***
ProgEnd:
CLOSE
END
MICROSOFT QUICKBASIC is a registered trade mark of Microsoft Corporation. 
						

							Ð 99 Ð
Connector signals
VIDEO IN
SERIAL IN (DIGITAL) BNC ´ 2 Active through (Option)
Y,  PB, PR (ANALOG) BNC ´ 3
VIDEO IN BNC ´ 2Loop-through, 75W termination
switch provided
REF VIDEO IN BNC ´ 2Loop-through, 75W termination
switch provided
VIDEO OUT
SERIAL OUT (DIGITAL) BNC ´ 3 (Option)
Y,  PB, PR (ANALOG) BNC ´ 3
VIDEO OUT BNC ´ 3
AUDIO IN
SERIAL IN (DIGITAL) BNC ´ 2 (Option)
AUDIO IN (DIGITAL) XLR ´ 2 CH1/CH2, AES/EBU format
AUDIO IN (ANALOG) XLR ´ 2 CH1, CH2
CUE IN XLR ´ 1
TIME CODE IN XLR ´ 1
AUDIO OUT
SERIAL OUT (DIGITAL) BNC ´ 3 (Option)
AUDIO OUT (DIGITAL) XLR ´ 2 CH1/CH2, AES/EBU format
AUDIO OUT (ANALOG) XLR ´ 2 CH1, CH2
CUE OUT XLR ´ 1
TIME CODE OUT XLR ´ 1
MONITOR OUT XLR ´ 2 L (CH1)/R (CH2)
HEADPHONES (front) Mini-jack
RS-422A REMOTE (9P)
REMOTE IN/OUT
Pin No.SignalPin No.SignalPin No.Signal
1 FRAME GROUND 4RECEIVE COMMON7 TRANSMIT B
2 TRANSMIT A 5 ÑÑÑÑÑ 8 RECEIVE A
3 RECEIVE B 6TRANSMIT COMMON9 FRAME GROUND
REMOTE OUT
Pin No.SignalPin No.SignalPin No.Signal
1 FRAME GROUND 4TRANSMIT COMMON7 RECEIVE B
2 RECEIVE A 5 ÑÑÑÑÑ 8 TRANSMIT A
3 TRANSMIT B 6RECEIVE COMMON9 FRAME GROUND
Pin No. Signal
1
2
3GND
HOT
COLD 
						

							Ð 100 Ð
Connector signals
PARALLEL REMOTE (25P)
Pin No.SignalPin No.SignalPin No.Signal
1 PLAY COMMAND 10 ÑÑÑÑÑ 1 9STAND BY ON STATUS
2 STOP COMMAND 11 ÑÑÑÑÑ 20 PREROLL STATUS
3 FF COMMAND 12³10V, MAX 300mA 21SERVO LOCK STATUS
4 REW COMMAND 13 PLAY STATUS 22OPERATION ENABLE STATUS
5 REC COMMAND 14 STOP STATUS 23 ÑÑÑÑÑ
6 EJECT COMMAND 15 FF STATUS 24 ÑÑÑÑÑ
7STAND BY COMMAND16 REW STATUS 25 GND
8PREROLL COMMAND17 REC STATUS
9 IN SET COMMAND 18 EJECT STATUS

¥ COMMAND pins: TTL level, active low, ³100ms edge electrical signal.
¥ STATUS pins: open collector, sink current 6 mA
RS-232C REMOTE (25-pin D-SUB crossover cable supported)
Pin No. Abbreviation Circuit Description
1 FRAME GROUND Protective ground Frame ground
2 RxD Received data Sends data to the PC.
3 TxD Transmitted data Receives data from the 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 GND Signal ground Signal ground
20 DSR Data set readyPositive power output after communication
enable status
ENCODER REMOTE (15P)
Pin No.SignalPin No.SignalPin No.Signal
1ÑÑÑÑÑ 6 SYSTEM H 0 11 RET GND
2 SET UP 7SYS.SC COARSE (2)12 ÑÑÑÑÑ
3 C LEVEL 8 Ð12V 13 ÑÑÑÑÑ
4 GND 9 HUE 14 SYS.SC FINE
5 +12V 10 VIDEO LEVEL 15SYS.SC COARSE (1)