Manual for MDT652S

1. Application

This document defines the communication protocols for serial control of the MDT652S.

2. Connectors and wiring

A: RS232C connection

Connects a PC to the display using a D-Sub 9-pin connector and a cross (reversed) cable or null modem cable.

B: CAT5 RS485 connection

Uses a D-SUB 9pin or USB connection between a PC and CAT5 Tx-BOX/Rx-BOX. Requires specific drivers for USB. Communication uses half-duplex control.

C: LAN connection

Connects a PC to the display using a modular 8pin (RJ45) and CAT5/6/7 LAN cable. For a direct connection without a LAN HUB, a cross LAN cable is needed. LAN control is converted to RS-232C control within the display.

3. Communication Parameter

Sets communication parameters for RS232C, CAT5 RS485, and LAN connections.

3.1 Communication timing

Defines packet intervals (at least 600ms), time-out error handling, and communication disabled periods after power on/off.

4. Communication Format

4-1. Basic command

Describes the basic command structure (Address, Function, Data, End codes) and control sequence for monitor operations like Power ON/OFF and input selection.

4-2. Extended command

Introduces a more complex command packet structure (Header, Message, Check code, Delimiter) for multi-monitor control via daisy-chained connections.

5. Message type

Details various message types such as Get current parameter, Get parameter reply, Set parameter, Set parameter reply, and Commands (e.g., Save Current Settings).

6. Typical procedure example

Provides step-by-step examples for changing settings like Brightness and reading temperature sensor values.