NEC LCD Monitor User Manual

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15. Daylight Saving read & write
15.1 Daylight Saving Read
This command is used in order to read the setting of Daylight Saving.
1) The controller requests the monitor to reply a Daylight Saving setting.
Header Message Check code
Delimiter
SOH-'0'-Monitor ID-
'0'-'A'-'0'-'8'
STX-'C'-'A'-'0'-'1'-'0'-'0'-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 (8bytes)
Message
STX (02h): Start of Message
'C'-'A'-'0'-'1' (43h, 41h, 30h, 31h): Daylight Saving Command
'0'-'0' (30h. 30h): Read
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 Date & Time to the controller.
Header Message Check
code
Delimiter
SOH-'0'-'0'-Monitor ID-
'B'-'2'-'0'
STX-'C'-'B'-'0'-'1'-'0'-'0'-ST-BM-BD1-BD
-BT1-BT2-EM-ED1-ED2-ET1-ET2-TD-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".
'2'-'0'(32h, 30h): Message length (32bytes)
Message
STX (02h): Start of Message
'C'-'B'-'0'-'1' (43h, 42h, 30h, 31h): Daylight Saving Setting reply command
'0'-'0' (30h, 30h): Read
ST: Error Status
No Error : 00h (30h, 30h)
Error : 01h (30h, 31h)
BM: BEGIN MONTH
JANUARY – DECEMBER: 01h (30h, 31h) - 12h (31h, 32h)
BD1: BEGIN DAY1
FIRST : 01h (30h, 31h)
SECOND : 02h (30h, 32h)
THIRD : 03h (30h, 33h)
FOUR : 04h (30h, 34h)

NEC LCD Monitor Specifications

General

Brand	NEC
Model	LCD Monitor
Category	Monitor
Language	English

Summary

Monitor Preparation and Connections

Connectors and Wiring for Remote Control

Describes physical connections and cables for RS-232C and LAN.

Communication Specifications and Format

Communication Parameter Details

Details communication parameters for RS-232C and LAN.

Command Packet Communication Format

Explains the structure of command packets, including header, message, check code, and delimiter.

Monitor Control Message Types

Defines various message types used for monitor control commands and replies.

Control Commands and Procedures

Typical Control Command Procedures

Provides step-by-step examples of common control command sequences.

Operation Code (OP Code) Table

Comprehensive table mapping operation codes to parameters and remarks for various functions.

Power Control Procedures

Outlines the procedures for reading and controlling monitor power status.

Asset Data Read and Write Commands

Details commands for reading and writing user asset data.

Date and Time Read and Write Commands

Commands for reading and writing the monitor's date and time settings.

Schedule Read and Write Commands

Commands for reading and writing schedule settings, including ON/OFF times and days.

Self-Diagnosis Status Read

Procedure for reading the monitor's self-diagnosis status.

Security Lock Control Commands

Commands for controlling the security lock function.

Firmware Version Read Command

Command for reading the monitor's firmware version.

Auto ID Function Commands

Commands related to the Auto ID function, including execution, completion, and reset.

Power Save Mode Commands

Commands for reading and writing power save mode settings and auto times.

Setting Copy Commands

Commands for reading, writing, and starting the setting copy function.

Proof of Play Log Data Commands

Commands for managing Proof of Play log data, including start, stop, current log, total number, and number-to-number log.