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So funktioniert das SONY LANC™-Protokoll

 

How SONY's LANC™ protocol works

Die LANC™ Schnittstelle ist eine bidirektionale serielle open-collector Schnittstelle, auf der zwei Geräte miteinander kommunizieren können. Der Camcorder oder der Fotoapparat (hier heisst die Buchse ACC) erhält darüber Steuerbefehle und gibt seinen Status zurück. Beim Camcorder kann man noch mehr Daten auslesen: Time Code, Data Code, Zählwerk, Restlaufzeit, Warnsignale und Laufwerksrückmeldungen.
LANC steht für Logic Application Control Bus System (aus einer Sony Information im April 1991 zur Einführung des "8mm Standard Time Code").
Der Master (also der Camcorder oder der Fotoapparat) gibt den Rahmen des Telegramms vor, indem er 8 Startbits generiert, denen jeweils 8 Bits (1 Byte) folgen. Anschliessend folgt ein (langes) Stopbit und das Spiel beginnt von vorn. Ein Bit hat die Länge von 104µs. Der Abstand zwischen zwei Startbits kann je nach Gerät zwischen 1200µs und 1400µs schwanken. Der Abstand zweier Telegramme beträgt 20ms für PAL/625 und 16,6ms für NTSC/525. Das Timing entspricht RS232 bei 9600 Baud.
Natürlich ist über die Schnittstelle auch der Service Mode einstellbar, ich gehe aber nicht darauf ein. Im Internet findet man dafür fertige Geräte zum Kauf.
Auch manche Camcorder der Firma Canon haben eine LANC-Buchse, allerdings reagieren diese Geräte nur auf wenige Befehle.
  LANC™ is a bidirektional serial open collector communication port, where two devices can communicate with each other. The camcorder or still video camera (plug is called ACC here) is able to receive commands and sends back its status.
The camcorder provides even more data: time code, data code, counter, remain time, alerts and drive feedback.
LANC ist short for Logic Application Control Bus System (from a Sony information to the introduction of the "8mm Standard Time Code" in april 1991).
The master (camcorder or still video camera) generates the telegram frame, creating 8 startbits, followed each by 8 bits (1 byte) and a (long) stopbit. Then everything starts again.
One bit has a duration of 104µs.
The distance between two startbits can vary between 1200µs and 1400µs depending on the device.
The distance between two telegrams is 20ms for PAL/625 and 16.6ms for NTSC/525. The timing conforms to RS232 at 9600 Baud.
Of course also the service mode is accessable, but I won't enter into this. In the internet you will find ready-to-use devices to buy.
Some Canon camcorders also have a LANC-Plug, but only few commands are implemented.


LANC protocol - timing diagram
LANC protocol - timing diagram

Site navigation: [Byte 0] [Byte 1] [Byte 2/3] [Byte 4] [Byte 5] [Byte 6/7] [Links]


LANC symbolConnections:

2.5 mm plug Mini-DIN plug A/V plug Voltage depends on model and battery.
CTL signal only on some devices (VCR control signal).

Connect LANC Signal to GND for >140 ms to power on (or on Mini-DIN Pin 3 to GND).
Cable length can easily exceed 10 m.
2.5 mm stereo "Klinke" /
2.5 mm stereo jack
Mini-DIN       A/V jack    
Sicht auf Gerätebuchse   /   device jack view


Ein Befehl ist erst nach 3...4 Telegrammen gültig.

Ausser LANC (CTRL-L) gibt es bei SONY die CTRL-S Schnittstelle und natürlich die Möglichkeit der IR Bedienung. Die Command-Codes sind überall die gleichen, bei CTRL-S und IR benötigt man noch einen Geräte-Code. Ausserdem sind die Codes verglichen mit LANC um ein Bit nach rechts verschoben.
SIRCS entspricht im Timing dem CTRL-S, aber SIRCS wird mit 40 kHz gepulst.
  A command is valid after 3...4 telegrams.

Except LANC (CTRL-L) there is also a CTRL-S plug at some SONY devices and of course the infrared control. The command codes are the same, but for CTRL-S and IR you need an additional device code and they are shifted right one bit, compared to LANC.
SIRCS and CTRL-S have the same timing, but SIRCS is pulsed with 40 kHz.


LANC symbolByte 0:

Sub-Command for Byte 1.

Binary code Description
0001 1000 Normal command to VTR or video camera
0010 1000 Special command to video camera
0011 1000 Special command to VTR
0001 1110 Normal command to still video camera

"Low-Nibble": Device Code
"High-Nibble": Guide Code


LANC symbolByte 1:

Sub-Command in Byte 0: 0001 1000 (bin)

The following table shows the actual Command-Codes to the device (Normal command to VTR or video camera).
Only valid with the corresponding Sub-Command in Byte 0.

command (hex) action
00 program 1
02 program 2
04 program 3
05 mode (only HDV/AVCHD)
06 program 4
08 program 5
0A program 6
0C program 7
0E program 8
10 program 9
12 program 0 (10: SL-HF950 MKII)
14 program 11 (SL-HF950 MKII)
16 enter, program 12 (SL-HF950 MKII)
18 program 13
1A program 14
1C program 15
1E program 16
20 program +
22 program -
24  
26  
28 x2
2A power (or viewfinder) off
2B photo write
2C eject
2E main/sub
30 stop
32 pause
33 start/stop
34 play
35 tele (only CCD-V90)
36 rew
37 wide (only CCD-V90)
38 fwd
39 photo capture
3A rec
3C rec-pause (some devices)
3E  
40 still
42  
44 x1/10
46 x1/5 (sometimes: vis. scan)
48  
4A x14
4C x9
4E tracking auto/manual
50 search -
52 search +
54 TV/VTR
56  
58  
5A VTR
5B date search / photo search / photo scan
5C  
5E power off
60 rev frame
62 fwd frame
64  
65 edit-search -
66 x1
67 edit-search +
68  
69 rec-review (not i.e. TR-2200)
6A  
6C sleep
6E tracking normal
70  
72  
74 rew+play
76  
78 AUX
7A slow +
7B tape end search (HDV)
7C slow -
7E  
80  
82 display mode
84 menu up
86 menu down
88 tracking/fine +
8A tracking/fine -
8C counter reset
8E zero mem
90 index mark
92 index erase
94 shuttle edit +
96 shuttle edit -
98 data code or goto
99 data code or recording parameters
9A menu
9C  
9E input select
A0  
A2 execute
A4 quick timer
A6 index
A8  
AA  
AC index search +, date search 01 (HDV)
AE index search -, date search -01 (HDV)
B0 tape speed
B2 goto zero / tape return (not DV)
B4 counter display, data screen
B6 open/close (SL-HF950), replay (FauHaEss)
B8 timer display
BA  
BC  
BD date display off
BE  
BF date display on
C0 timer set
C2 menu right, next
C4 menu left
C6 timer clear
C8 timer check
CA timer record
CC  
CE  
D0 audio dub
D2  
D4 edit assemble
D6 edit mark
D8 synchro edit
DA  
DC digital off (VCR), print (DV)
DE speed +
E0 speed -
E2 stop motion
E4  
E6  
E8 channel scan / flash motion
EA  
EC voice boost
EE  
F0  
F2  
F4  
F6  
F8 digital scan
FA high-speed-rew
FC still/shuttle (EV-S880)
FE  


Sub-Command in Byte 0: 0010 1000 (bin)

The following table shows the actual Command-Codes to the device (Special command to video camera).
Only valid with the corresponding Sub-Command in Byte 0.

command (hex) action
00 variable speed zoom Tele: slowest speed
02 variable speed zoom Tele: faster than 00
04 variable speed zoom Tele: faster than 02
06 variable speed zoom Tele: faster than 04
08 variable speed zoom Tele: faster than 06
0A variable speed zoom Tele: faster than 08
0C variable speed zoom Tele: faster than 0A
0E variable speed zoom Tele: fastest speed
10 variable speed zoom Wide: slowest speed
12 variable speed zoom Wide: faster than 10
14 variable speed zoom Wide: faster than 12
16 variable speed zoom Wide: faster than 14
18 variable speed zoom Wide: faster than 16
1A variable speed zoom Wide: faster than 18
1C variable speed zoom Wide: faster than 1A
1E variable speed zoom Wide: fastest speed
21 grid (AVCHD)
25 fader
27 rec start (DV, some cameras)
29 rec stop (DV, some cameras)
30 variable speed zoom Tele (avoiding digital zoom, some cameras): slowest speed
32 variable speed zoom Tele (avoiding digital zoom, some cameras): faster than 30
34 variable speed zoom Tele (avoiding digital zoom, some cameras): faster than 32
35 Zoom Tele slow (working all cameras since approx. 1996)
36 variable speed zoom Tele (avoiding digital zoom, some cameras): faster than 34
37 Zoom Wide slow (working all cameras since approx. 1996)
38 variable speed zoom Tele (avoiding digital zoom, some cameras): faster than 36
39 Zoom Tele fast (working all cameras since approx. 1996)
3A variable speed zoom Tele (avoiding digital zoom, some cameras): faster than 38
3B Zoom Wide fast (working all cameras since approx. 1996)
3C variable speed zoom Tele (avoiding digital zoom, some cameras): faster than 3A
3E variable speed zoom Tele (avoiding digital zoom, some cameras): fastest speed
41 Auto-Focus on/off (not if there is a real switch at the camera)
45 Focus manual far
47 Focus manual near
49 White balance toggle (only cameras until approx. 1996)
4B Backlight (not DV)
51 Backlight (DV)
53 Exposure auto/man. toggle (models of the early 90's)
Iris more close
55 Iris more open
61 Shutter (models of the early 90's)
77 White balance reset (not if white balance is selected via menu)
85 Memory impose (models of the early 90's)
87 Color / Mode (models of the early 90's)
89 Superimpose (models of the early 90's)
AF Iris auto


Sub-Command in Byte 0: 0001 1110 (bin)

The following table shows the actual Command-Codes to the device (Normal command to still video camera).
Only valid with the corresponding Sub-Command in Byte 0.

command (hex) action
01 variable speed zoom Tele: slowest speed
03 variable speed zoom Tele: faster than 01
05 variable speed zoom Tele: faster than 03
07 variable speed zoom Tele: faster than 05
09 variable speed zoom Tele: faster than 07
0B variable speed zoom Tele: faster than 09
0D variable speed zoom Tele: faster than 0B
0F variable speed zoom Tele: fastest speed
11 variable speed zoom Wide: slowest speed
13 variable speed zoom Wide: faster than 11
15 variable speed zoom Wide: faster than 13
17 variable speed zoom Wide: faster than 15
19 variable speed zoom Wide: faster than 17
1B variable speed zoom Wide: faster than 19
1D variable speed zoom Wide: faster than 1B
1F variable speed zoom Wide: fastest speed
52 photo preview
58 photo save (or in movie mode: start-stop)
5E power off
94 Zoom Tele slow
96 Zoom Wide slow
98 Zoom Tele fast
9A Zoom Wide fast


LANC symbolByte 2 / 3:

The significant Guide Code for Byte 3 is found in the "High-Nibble" of Byte 2.
The following table shows the known codes for video cameras.
Some cameras show up a sort of ID in Byte 2 and 3, but I did not find any systematic order.
Has anybody an idea concerning the meaning of these values?

Guide
Code
Description Byte 3, L-N Byte 3, H-N
9 channel / tuner AV or OFF: 1010
channel: One's
No Tuner: 0000 and H-N 0000
AV or OFF: 1010
channel: Ten's (at 0: 0000 or 1010)
No Tuner: 0000 and L-N 0000
A channel / tuner AV or OFF: 1010
channel: Hundred's
No Tuner: 0000
Tuner-Type 1: 00
Tuner-Type 2: 01
Tuner-Type 3: 10


LANC symbolByte 4:

Status-Code from the connected device (video camera).

L-N
H-N
0 1 2 3 4 5 6 7 8
0 initial is eject stop fwd rec   play play/pause fwd AL insert
1   dew cass. out load   rec/ pause     frame fwd AL ins-pause
2   ejecting cassette busy   timer-rec   x1 fwd 1/5 fwd AR insert
3   unload low-battery go zero/play f. timer-rec s.   x1 rev 1/5 rev AR ins-pause
4     dew stop fwd mem stop AV insert   cue 1/10 fwd AL+V insert
5     emergency   AV ins.-pause   rev 1/10 rev AL+V ins-ps
6     tape end   video insert   x2/x3 fwd frame fwd AR+V insert
7     tape top   video ins.-ps   x2/x3 rev frame rev AL+R ins-ps
8       rew audio dub edit search+ x9 fwd    
9     stp after zero   a.dub pause edit search- x9 rev play/pause rev  
A     load emer. auto-play cam rec edit-s fwd frame sea. cue    
B   unload emerg. stop emerg. 1 go zero/play r. cam stby edit-s rev frame sea. rev    
C     stop emerg. 2 rew mem stop     x14 fwd    
D       hi-speed rew     x14 rev    
E     stop NC            
F           edit pause      


Status-Code from the connected device (still video camera).

L-N
H-N
0 D E
0 initial    
D     mpeg movie mode
E     photo mode
F   play mode setup mode


LANC symbolByte 5:

Bit Description
0 1 = invalid transmitted code
1 1 = rec protection (old models: tape pre-end)
2 1 = battery low
3 1 = zero mem / zero found
4...7 Guide Code for Byte 6 and 7


LANC symbolByte 6 / 7:

The significant Guide Code for Byte 6 and 7 is found in the "High-Nibble" of Byte 5.
The following table shows the known codes.

Guide
Code
Description Byte 6, L-N Byte 6, H-N Byte 7, L-N Byte 7, H-N
0          
1 Status V8 and Hi8 0+1: tape speed
00=SP, 01=LP
2: standard FM-sound
3: PCM-sound
0: camera-mode
1: rec protection / tape pre-end
2: ME (0=MP)
3: 13µm (0=10µm)
0:
1: camera-mode
2:
3: servo / mechanics on
0+2: input select

(00=tuner, 01=sim, 11=line)
2 decimal Counter One's Ten's Hundred's Thousand's
3 real time Counter,
picture Counter
Seconds One's,
Picture One's
Seconds Ten's,
Picture Ten's
Minutes One's,
Picture Hundred's
Minutes Ten's,
Picture Thousand's
4 real time Counter Hours One's Hours Ten's Frames One's or Day One's
(or 0000/1111)

("Day" only seen in CCD-V90E!)
0+1: Frames Ten's or Day Ten's
2: RCTC
3: sign (1=negativ)
(or 0000/1111)
5 remain time Minutes One's Minutes Ten's Hours One's 2: 0=calculating
(old devices: 1111)
6          
7 Status Betamax or DV Betamax:
0+1: tape speed
00=BI, 01=BII, 10=BIII
2: Beta Hifi
3: servo/ mechanics on
DV:
0+1: tape-speed
00=SP, 01=LP
2: audio (0=12bit, 1=16bit)
3: servo / mechanics on
0: 0=Betamax, 1=DV

1: rec protection
2+3: Byte 7 DV mode:
00=DV input
01=ext. Status DV in a Camera
10=
11=ext. Status DV in a VTR
Betamax:
0+1: Audio L+R insert
2: Video insert
3: assemble

DV mode 00:
input tuner: 0000, input Line: 0101, input DV: 1010
DV mode 01:
mode: 0000=player, 0011=camera
Betamax:
0: edit
1: preview
2: EE
3:

DV mode 00:
Line 1: 0000     Line 3: 1010
Line 2: 0101     Line 4: 1111
8 Data Guide DC: 4 DC: 1 DC: 3=Date, 4=Time DC: 0
9 Data-Code
(Tape + Picture)
Date: Year One's
Time: Hour One's
Date: Year Ten's
Time: Hour Ten's
Date: Month One's
Time: Minutes One's
Date: Month Ten's
Time: Minutes Ten's
A Data-Code
(Tape + Picture)
Date: Day One's
Time: Seconds One's
Date: Day Ten's
Time: Seconds Ten's
DC: 1111
sometimes 1000
DC: 1111
sometimes 1001/1011
B Status AVCHD 0: 1=AVCHD camera mode
1: 1=AVCHD photo mode
0000 0000 0000
C Status Hi8,
DV (+GC1)
Hi8: 0100
DV: 0010 or 0001
Hi8: 0100
DV: 0010 or 0000
0: camera mode / CTL found
1:
2: edit on
3: auto Hi8
0000
D          
E Status Photo 0: 1=photo mode selected
1: 1=memorystick™ inserted
2: 1=memorystick™ write-protected
0: 1=memorystick™ play
1: 1=memorystick™ search
2: 1=memorystick™ full
3: 1=camera with memorystick™
0: 1=photo mode available  
F          


Wer mit dem Lötkolben umgehen kann, kann sich für ca. 20 Euro eine Videoschnittlösung mit integrierter lernfähiger Infrarotfernbedienung bauen.

Das Ding heisst IRdeo und ist hier sehr ausführlich beschrieben.
Mit IRdeo ist es auch möglich, eigene Programme zu entwerfen, die LANC (CTRL-L) empfangen und Befehle an Sony Equipment aussenden.


 

If you are familiar with a soldering iron you can construct your own video editing solution with integrated learning remote control for only EUR 20.
It is called IRdeo and is described here very comprehensive.
With IRdeo it is possible to design your own software for Sony devices to receive and send LANC (CTRL-L) commands.


"LANC" und "memorystick" sind eingetragene Warenzeichen von SONY
"LANC" and "memorystick™" are registered trademarks of SONY

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