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

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