NEC P403-AVT User Manual download pdf (Page 125)

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22. Security Enable

22.1 Security Enable Read

This command is used in order to read the Security Enable.

1) The controller requests the monitor to read Security Enable

Header Message Check code

Delimiter

SOH-'0'-Monitor ID-

'0'-'A'-'0'-'8'

STX-'C'-'A'-'0'-'C'-'0'-'2'-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".

'0'-'8'(30h, 38h): Message length (8byte)

Message

STX (02h): Start of Message

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

'0'-'2' (30h, 32h): Enable Read

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 Security Enable to the controller.

Header Message Check code

Delimiter

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

'B'-'0'-'A'

STX-'C'-'B'-'0'-'C'-'0'-'2'-EN-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'-'0'-'2' (43h, 42h, 30h, 41h, 30h, 32h): Get Security Enable Disable Reply

EN: Status

00h: Disable

01h: Enable

ETX (03h): End of Message

Check code

BCC: Block Check Code

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

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NEC P403-AVT User Manual Page 125

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