NEC LCD Monitor User Manual

(123/137)
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-…-PWD8-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 – PWD8: Password data
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 “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
SOH (01h): Start of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller.
Monitor ID: Indicate a replying Monitor ID.
Ex.) When this byte is set to ‘A’, replying monitor’s ID is ‘1’.
'B' (42h): Message type is "Command reply".
'0'-'A'(30h,41h): Message length (10byte)
Message
STX (02h): Start of Message
'C'-'B'-'0'-'C' (43h, 42h, 30h, 43h): Security password Reply Command
'0'-'1' (30h, 31h): Enable Write
ST: Error Status
00h: No Error
01h: Error
ETX (03h): End of Message

NEC LCD Monitor Specifications

General

Brand	NEC
Model	LCD Monitor
Category	Monitor
Language	English