Canon LV-8235 UST User manual

© 2011 CANON INC. YT1-1442-000
MULTIMEDIA PROJECTOR
LV-8235 UST
BASIC SERIAL
COMMAND SPECIFICATIONS
Revision 1

LV-8235 UST Basic Serial Command Specifications
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Table of Contents
1. Overview............................................................................................. 1
2. Serial Interface Specifications...........................................................2
2.1. Transfer Specifications .............................................................................................2
2.2. Connection ...............................................................................................................2
3. Notes for Communication ..................................................................3
4. Functional Execution Command Table.............................................4
5. Status Read Command Table ............................................................ 6
6. Functional Execution Command ....................................................... 7
6.1. Format......................................................................................................................7
6.2. Command Pipelining ................................................................................................7
6.3. Transfer Example .....................................................................................................7
6.4. Operation Requirements ..........................................................................................8
6.5. POWER ON Command............................................................................................9
6.6. POWER OFF Command (Quick Power OFF) ..........................................................9
6.7. POWER OFF Command ..........................................................................................9
6.8. HDMI Command.......................................................................................................9
6.9. Computer 1 Command .............................................................................................9
6.10. Computer 2 Command ...........................................................................................10
6.11. Video Command.....................................................................................................10
6.12. VOLUME + Command............................................................................................10
6.13. VOLUME – Command............................................................................................10
6.14. AUDIO MUTE ON Command .................................................................................10
6.15. AUDIO MUTE OFF Command ............................................................................... 11
6.16. VIDEO MUTE ON Command ................................................................................. 11
6.17. VIDEO MUTE OFF Command ............................................................................... 11
6.18. Screen Normal size Command............................................................................... 11
6.19. Screen Full size Command .................................................................................... 11
6.20. Image Standard Command..................................................................................... 11
6.21. Image Real Command ...........................................................................................12
6.22. Image Cinema Command ......................................................................................12
6.23. Image1 Command..................................................................................................12
6.24. Image2 Command..................................................................................................12
6.25. Image3 Command..................................................................................................12
6.26. Image4 Command..................................................................................................12
6.27. Image Dynamic Command .....................................................................................12
6.28. MENU ON Command.............................................................................................13
6.29. MENU OFF Command ...........................................................................................13
6.30. DISPLAY CLEAR Command ..................................................................................13
6.31. BRIGHTNESS + Command ...................................................................................13
6.32. BRIGHTNESS – Command....................................................................................13
6.33. IMAGE (Toggle) Command ....................................................................................14
6.34. Direct on Setting Command ...................................................................................14
6.35. Direct on Cancel Command ...................................................................................14
6.36. Power Management Ready Command ..................................................................14
6.37. Power Management OFF Command......................................................................14
6.38. Power Management Shut down Command............................................................14
6.39. D.ZOOM + Command ............................................................................................15
6.40. D.ZOOM – Command ............................................................................................15

LV-8235 UST Basic Serial Command Specifications
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6.41. S-Video Command .................................................................................................15
6.42. POINTER RIGHT Command..................................................................................15
6.43. POINTER LEFT Command ....................................................................................15
6.44. POINTER UP Command ........................................................................................ 15
6.45. POINTER DOWN Command..................................................................................16
6.46. ENTER Command..................................................................................................16
6.47. FREEZE ON Command .........................................................................................16
6.48. FREEZE OFF Command .......................................................................................16
6.49. ZOOM- Command..................................................................................................16
6.50. ZOOM+ Command.................................................................................................16
6.51. Computer 1 Analog RGB Command ......................................................................17
6.52. Computer 1 RGB (SCART) Command...................................................................17
6.53. Computer 1 Component Command........................................................................17
6.54. AUTO PC ADJ. Command .....................................................................................17
6.55. PRESENTATION TIMER Command ......................................................................17
6.56. KEYSTONE ↑Command.........................................................................................17
6.57. KEYSTONE ↓Command.........................................................................................18
7. Status Read Command..................................................................... 19
7.1. Format....................................................................................................................19
7.2. Transfer Example ...................................................................................................19
7.3. Operation Requirements ........................................................................................19
7.4. Status Read Command ..........................................................................................20
7.5. Input Mode Read Command ..................................................................................22
7.6. Lamp Time Read Command...................................................................................22
7.7. Setting Read Command .........................................................................................22
7.8. Temp Read Command ...........................................................................................22
7.9. Lamp Mode Read Command .................................................................................23

LV-8235 UST Basic Serial Command Specifications
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１．Overview
1.1. These specifications define projector control commands for LV-8235 UST.
1.2. The projector control commands are used to remotely control a projector through RS-232C from a
computer.

LV-8235 UST Basic Serial Command Specifications
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２．Serial Interface Specifications
2.1. Transfer Specifications
Item Specifications
Synchronous system Asynchronous
Transmission Speed 9600 / 19200
Data Length 8 bit
Parity N/A
Stop Bit 1
Flow Control N/A
1) Transmission speed: initial setting value is 19200.
2) Transmission speed can be changed in service mode.
2.2. Connection
Dedicated serial cable must be used for connection to a computer and a projector.
PC Projector
COM 1  ControlPort
(D-Sub 9 Pin) (D-Sub 9 Pin)

LV-8235 UST Basic Serial Command Specifications
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３．Notes for Communication
1. The projector control command is defined as one command/one line that starts with “C” and ends
with carriage return (0x0D).
2. There are two types of Commands: Functional Execution Commands and Status Read
Commands.
Example of Functional Execution Command: “C05” [CR]
Example of Status Read Command: “CR0” [CR]
3. When it takes more than one second to receive one command, it does not operate.
The information of buffer is cleared when it takes more than one second to receive carriage return
(0x0D) after the projector receives the first data “C”.
4. For Command pipelining, wait for the interval of 100ms after receiving a response.
More than 100ms
Command
PC →Projector “C” “0” “7” CR Next Command
Projector →PC ACK CR
Response
(A few ms 〜5s)
4.1. When a command is issued before receiving a response, the function is not executed properly.
4.2. Except for when there is no Response for more than 5 seconds.
5. It takes about 5 seconds for internal initialization after plugging in AC power. During this time, it
cannot process commands. Do not issue any command.
6. The number of characters of response to Status Read Commands depends on commands.
Please see [7. Status Read Commands].
7. Characters for commands must be Capital (A - Z).

LV-8235 UST Basic Serial Command Specifications
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４．Functional Execution Command Table
Command Item Command Item
C00 POWER ON C20 BRIGHTNESS +
C01 POWER OFF
(Quick Power OFF) C21 BRIGHTNESS -
C02 POWER OFF C22 ―――
C03 ――― C23 ―――
C04 HDMI C24 ―――
C05 Computer 1 C25 ―――
C06 Computer 2 C26 ―――
C07 Video C27 IMAGE(Toggle)
C08 ――― C28 Direct on Enable
C09 VOLUME + C29 Direct on Disable
C0A VOLUME - C2A Power Management Ready
C0B AUDIO MUTE ON C2B Power Management OFF
C0C AUDIO MUTE OFF C2C ―――
C0D VIDEO MUTE ON C2D ―――
C0E VIDEO MUTE OFF C2E Power Management Shut down
C0F Screen Normal size (4：3) C2F ―――
C10 Screen Full size C30 D.ZOOM +
C11 Image Standard C31 D.ZOOM -
C12 Image Real C32 ―――
C13 Image Cinema C33 ―――
C14 Image 1 C34 S-video
C15 Image 2 C35 ―――
C16 Image 3 C36 ―――
C17 Image 4 C37 ―――
C18 ――― C38 ―――
C19 Image Dynamic C39 ―――
C1A ――― C3A POINTER RIGHT
C1B ――― C3B POINTER LEFT
C1C MENU ON C3C POINTER UP
C1D MENU OFF C3D POINTER DOWN
C1E DISPLAY CLEAR C3E ―――
C1F ――― C3F ENTER
――― means no function.

LV-8235 UST Basic Serial Command Specifications
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Command Item Command Item
C40 ――― C80 ―――
C41 ――― C81 ―――
C42 ――― C82 ―――
C43 FREEZE ON C83 ―――
C44 FREEZE OFF C84 ―――
C45 ――― C85 ―――
C46 ZOOM - C86 ―――
C47 ZOOM + C87 ―――
C48 ――― C88 ―――
C49 ――― C89 Auto PC ADJ.
C4A ――― C8A PRESENTATION TIMER
C4B ――― C8B ―――
C4C ――― C8C ―――
C4D ――― C8D ―――
C4E ――― C8E KEYSTONE ↑
C4F ――― C8F KEYSTONE ↓
C50 Computer 1 Analog RGB C90 ―――
C51 Computer 1 RGB (Scart) C91 ―――
C52 ――― C92 ―――
C53 ――― C93 ―――
C54 Computer 1 Component C94 ―――
――― means no function.

LV-8235 UST Basic Serial Command Specifications
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５．Status Read Command Table
Command Item Memo
CR0 Status Read
CR1 Input Mode Read
CR2 ―――
CR3 (Corresponding) Lamp Time Read
CR4 Setting Read
CR5 ―――
CR6 Temp Read
CR7 Lamp Mode Read
―――means no function.

LV-8235 UST Basic Serial Command Specifications
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６．Functional Execution Command
6.1. Format
6.1.1PC issues a command in format as below.
“C” COMMAND [CR]
Command: two characters (See Basic Functional Execution Command Table)
A projector changes received data to decode and returns a result after being ready to
receive next command.
[ACK][CR]：(0x06、0x0D)When received Functional Execution Commands.
6.1.2 “?” [CR]：When the received data cannot be decoded.
6.2. Command Pipelining
When some functions need the command pipelining, the performance is the same as that of the
remote control;
6.2.1. System: issues any command every 100 ms.
6.2.2. When receiving the appropriate command, the function is executed for 120 ms from the
moment.
6.2.3. When receiving the same command continuously within 120 ms, the function is executed
for another 120 ms from the moment.
6.2.4. When there is no incoming command after 120 ms, the execution of pipelining is stopped.
6.2.5. When the projector receives other incoming commands within 120ms, the execution of
pipelining is stopped.
6.3. Transfer Example
Switch the projector to video mode with Basic Command.
Command
PC →Projector “C” “0” “7” CR
Projector →PC  ACK CR
 Processing
(A few ms 〜5s)