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22.2 Security Enable Write

This command is used in order to write the setting of Security Enable.

1) The controller requests the monitor to set Security password.

Header Message Check code

Delimiter

SOH-'0'-Monitor ID-

'0'-'A'-'1'-'C'

STX-'C'-'A'-'0'-'C'-'0'-'1'-

ENA-'0'-'0'-PWD1-…-PWD16-ETX

BCC CR

Header

SOH (01h): Start of Header

'0' (30h): Reserved

Monitor ID: Specify the Monitor ID of which you want to change a setting.

Ex.) If Monitor ID is '1', specify 'A'.

'0' (30h): Message sender is the controller.

'A' (41h): Message type is "Command".

'1'-'C'(31h,43h): Message length (28byte)

Message

STX (02h): Start of Message

'C'-'A'-'0'-'C' (43h, 41h, 30h, 43h): Security Password Command

'0'-'1' (30h, 31h): Enable Write

ENA: Enable/Disable

00h (30h, 30h): Disable

01h (30h, 31h): Enable

'0'-'0' (30h, 30h): Reserved

PWD1 – PWD16: Password data



The password data is encoded as the following procedure.

Ex.) In the case of password data "1234"

Step1: Password data is handled as character code.

Example:

"1234" -> 31h 32h 33h 34h (ASCII)

Step2: The hexadecimal value of each original character is encoded as two ASCII

characters representing the hex value.

Example:

31h 32h 33h 34h -> '3'-'1'-'3'-'2'-'3'-'3'-'3'-'4'

Step3: Password data is handled as character code once again.

Example:

'3'-'1'-'3'-'2'-'3'-'3'-'3'-'4' -> 33h 31h 33h 32h 33h 33h 33h 34h

(ASCII)

Step4: The hexadecimal value of each original character is encoded as two ASCII

characters representing the value.

Example:

33h 31h 33h 32h 33h 33h 33h 34h

-> '3'-'3'-'3'-'1'-'3'-'3'-'3'-'2'-'3'-'3'-'3'-'3'-'3'-'3'-'3'-'4'

Result: The following data is assigned to PWD1-PWD16.

33h 33h 33h 31h 33h 33h 33h 32h 33h 33h 33h 33h 33h 33h 33h 34h

ETX (03h): End of Message

Check code

BCC: Block Check Code

Refer to the section 4.3 “ Check code” for a BCC calculation.

Delimiter

CR (0Dh): End of packet

2) The monitor replies a written in result.

Header Message Check code

Delimiter

SOH-'0'-'0'-Monitor ID-

'B'-'0'-'A'

STX-'C'-'B'-'0'-'C'-'0'-'1'-ST-ETX BCC CR

Header

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NEC MultiSync C431 Specifications

General

Response time	6.5 ms
Display diagonal	50 \
Display brightness	400 cd/m²
Display technology	LCD
Native aspect ratio	-
Vertical scan range	24 - 85 Hz
Horizontal scan range	31.5 - 91.1 kHz
LED backlighting type	Edge-LED
Display number of colors	1.073 billion colors
Display diagonal (metric)	125.73 cm
Active display area (W x H)	1095 x 616 mm
Supported graphics resolutions	800 x 600 (SVGA), 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1280 x 720 (HD 720), 1280 x 768, 1280 x 800, 1280 x 960, 1360 x 768 (WXGA), 1400 x 1050 (SXGA+), 1440 x 900 (WXGA+), 1600 x 1200 (UXGA), 1680 x 1050 (WSXGA+), 1920 x 1080 (HD 1080), 1920 x 1200 (WUXGA)
USB 2.0 ports quantity	1
Ethernet LAN data rates	10, 100 Mbit/s
Annual energy consumption	110 kWh
Power consumption (standby)	0.5 W
Power consumption (typical)	75 W
USB version	2.0
Ethernet LAN	Yes
HDMI ports quantity	3
Compatible memory cards	MicroSD (TransFlash)
Purpose	Universal
Product type	Group video conferencing system
Product color	Black
Number of persons	- person(s)
Operating hours (hours/days)	24/7
International Protection (IP) code	IP5X, IP2X
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	20 - 80 %
Orientation	Horizontal/Vertical
Certification	CE; EMC B; FCC; PSB; TÜV GS; UL/C-UL / CSA; VCCI
Product design	Digital signage flat panel
Placement supported	Indoor
Bezel width (bottom)	12.4 mm
Panel mounting interface	300 x 300 mm
Audio formats supported	MP3, WAV
Image formats supported	JPG, PNG
Video formats supported	FLV, H.264, MOV, MP4, WMV
Sustainability certificates	RoHS, ENERGY STAR
RMS rated power	20 W
Number of built-in speakers	2
Megapixel	- MP
Image sensor size	- \
Cables included	AC, DisplayPort, HDMI