Mitsubishi Electric RS232/485/LAN Serial Communication Control Manual de usuario

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RS232/485/LAN Serial Communication Control

for MDT652S

Application

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

-----Revision History-----

Release May. 24 2011. H.Tanizoe, M.Juichiya, T.Kimura, Y.Ashizaki

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Connectors and wiring

A: RS232C connection

Connector: D-Sub 9-pin

Cable: Cross (reversed) cable or null modem cable

B: CAT5 RS485 connection

Connector:

D-SUB 9pin or USB(Either one can be used for communication between PC and CAT5

Tx-BOX and Rx-BOX (Option). In order to use the USB, you need USB driver with your PC

installed. Please check User's manual for details.)

Cable:

(D-SUB 9pin: Full wired Cross (reversed) cable, USB: Standard USB cable (A-B))

Note: The CAT5 serial communication function requires half duplex communication control by DTR and

RTS control which is not required by simple RS232C control. The RS485 communication function is

different fromRS232C control method. Please check Appendix B for more details.

C: LAN connection

Connector: Modular 8pin (RJ45)

Cable:

Modular 8pin (RJ45),

Strait CAT5/6/7 LAN cable

* If you connect one PC and one display without LAN HUB, you use Cross LAN cable.

PC LAN HUB Display #1

Display #2

LAN cable LAN cables

Note: LAN control is converted to RS-232C control in the display.

USB Cable

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3. Communication Parameter

Set each communication parameters to the PC connected with each kind of cable.

A: RS-232C connection

(1)

RS-232C direct connection between PC and Display

Interface

RS-232C (

Asynchronous, Full-duplex)

Baud rate

9600bps

Data length

8bits

Parity

None

Stop bit

1 bit

Flow control None

Communication code

ASCII

Communication signals

TXD, RXD

B: CAT5 (OPTION) RS-485 connection

(1)

USB connection between PC and CAT5 Tx BOX

Interface

RS-232C (

Asynchronous, Half-duplex)

via USB driver

Baud rate

9600bps

Data length

8bits

Parity

None

Stop bit

1 bit

Flow control None

Communication code

ASCII

Communication signals

TXD, RXD, RTS

Note: Set the parameters on to USB driver properties. RTS is negative polarity.

(2)

RS-232C connection between PC and CAT5 Tx BOX

Interface

RS-232C (

Asynchronous, Half-duplex)

Baud rate

9600bps

Data length

8bits

Parity

None

Stop bit

1 bit

Flow control None

Communication code

ASCII

Communication signals

TXD, RXD, DTR

Note: DTR is negative polarity.

C: LAN connection

(1) LAN connection between PC and Display

Interface

TCP/IP

DHCP client mode

Changeable (default = OFF: not using)

IP address

Changeable (default = 192.168.0.10: depends on model)

Subnet mask

Changeable (default = 255.255.255.0)

Default gateway

Changeable (default = 192.168.0.1: depends on model)

Port

MDT652S:63007/3007(Both of those ports are available. Use

63007 only if you have no support of legacy products.)

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3.1 Communication timing

The controller should wait for a packet interval before next command is sent.

The packet interval needs to be longer than 600msec for the MDT652S.

[Important Information]

HOST system shall send next command after receiving a reply command from Monitor, if it is sequential

commands communication. If Host doesn’t wait for monitor’s reply, monitor operation error may happen.

Time-out error handling operation in Controller: Host Controller shall wait the reply from Monitor, after sending command as

mentioned above. The time-out setting in Host Controller shall be more than 30sec after sending command to Monitor. (Using the

maximum command interval “a

MAX

” is most safety.)

Communication disabled period after power on/off: After Monitor Power on, either by AC switch, Remote Controller or

Serial communication command, Monitor goes initialize mode of controller and can not handle the remote control

commands correctly during the mode. So do NOT send any command at least 7 sec. after monitor power on/off. If you make

the code which send any command after POWER ON/OFF command, please put a wait at least 7 sec. after sending the

command.

About the other commands, please wait the each periods of command interval from PC. (See below example.)

[Available Command list at DC power off status]

MDT652S can’t accept and reply any command except for the following commands when it is in DC power off or power

saving.

Power status Read / Read Model name Read / Serial number Read /Power on / Power off

Example of communication timing

Command #1

Reply #1

Command #2

Reply #2

* Command interval from PC (Wait sending next command for processing in display.)

a > 7sec: When Command #1 is power command “POWER ON”,”POWER OFF”.

a > 5sec: When Command #1 is video input command “INPUT D-SUB”,”INPUT VIDEO”, etc.

a > 1.8sec: When Command #1 is store the adjusted value command “SAVE CURRENT SETTINGS”,

“SAVE CURRENT SETTINGS QUICK”.

a > 6sec: When Command #1 is “AUTO SETUP”.

a > 30sec: When Command #1 is “FACTORY RESET”, “SCREEN RESET”. (This results in a

MAX

)

a > 600msec: When Command #1 is the others.

* Minimum reply time from display (Additional time depends on command processing in display)

b = 10msec (Typ.): On RS-232C connection (The time depends on models as 10 to 20msec.)

b = 140msec (Typ.): On RS-485 connection (The time depends on models as 90 to 140msec.)

b = 30sec (max): When Command #1 is “FACTORY RESET”, “SCREEN RESET”.

* Command internal gap (Don’t make a longer interval gap between characters.)

C < 10msec: Normal communication for time-out error of each character gap.

(Infinit

waitin

isn’t su

orted because of

ocessin

freeze.)

Display

Characters of Command #1

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4. Communication Format

4-1.Basic command

This command set supports only the basic control of monitor and does NOT support multi monitor control

by daisy chained connection. This command set will be written in the user’s manual of MDT652S.

1) Control command diagram

The command is structured by the address code, function code, data code and end code. The length of the command is different for

each function.

2) Control sequence

(1) The command from a computer to the LCD monitor will be sent in 600ms.

(2) The LCD monitor will send a return command 600ms* after it has received and encoded. If the command isn’t

received correctly, the LCD monitor will not send the return command.

(3) The personal computer checks the command and confirms if the command, which has been sent, has been executed or not.

(4) This LCD monitor sends various codes other than return code. When having a control sequence by RS-232C, reject other

codes from personal computers side.

*: The sending time of return command may delay depending on the condition (during changing of the input signal, etc.).

Example: Turn the power ON ( ’ ’ is for ASCII code)

Note: The replied status is for communication confirmation. When you want to know the display condition, please use the ‘Read

command’. (See page 6)

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3) Operation commands

The operation commands execute the basic operation setting of this LCD monitor.

It may not operate when changing the signal:

Operation

ASCII

HEX

POWER ON

21h

POWER OFF

22h

INPUT HDMI

_r1

5Fh 72h 31h

INPUT DVI-D

_r2

5Fh 72h 32h

INPUT D-SUB

_r3

5Fh 72h 33h

INPUT BNC _r4 5Fh 72h 34h

INPUT CAT5 _r5 5Fh 72h 35h

INPUT DisplayPort _r6 5Fh 72h 36h

INPUT VIDEO

_v1

5Fh 76h 31h

INPUT YPbPr

_v2

5Fh 76h 32h

INPUT S-VIDEO*

_v3

5Fh 76h 33h

* S-VIDEO is SEPARATE only

4) Read command

Host computer sends the command without Data-code to monitor.

After receiving this command, the monitor returns the command with Data-code of current status to host computer.

< ex. > When Host computer ask Power status of monitor, the status of monitor is powered-on.

Structure of the Read-command

ASCII

HEX

Function

Data (Receive)

Function

Data (Receive)

76 50

POWER

OFF(sleep/stand by)

76 50

HDMI

76 49

72 31

DVI-D

76 49

72 32

D-SUB

76 49

72 33

BNC

76 49

72 34

CAT5 vI

76 49

72 35

DisplayPort vI

76 49

72 36

Video

76 49

76 31

ｂ

76 49

76 32

Input

S-VIDEO

76 49

76 33

HIGHBRIGHT

76 4D

70 31

Picture mode

STANDARD

76 4D

70 32

Around

Main

board

resolution

1˚C

tc1

(ex.) +25

74 63 31

2B 20 32 35

Temperature

of Internal

monitor

Around

Power

PCB

resolution

1˚C

tc2

(ex.) +31

74 63 32

2B 20 33 31

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5) Remote command

(Not executable in sleep/stand-by mode. When the remote commands are sent while sleep/stand-by mode, the stand-by mode is

only canceled.)

Some remote control operations can be achieved by the remote command codes. The remote commands have no data codes.

Function

Button’s name on remote

Character ASCII

+/VOLUME r06 72h 30h 36h

-/VOLUME r07 72h 30h 37h

AV MUTE ra6 72h 61h 36h

AUTO SETUP r09

72h 30h 39h

[Example] When executing the AUTOSETUP. (Figures and symbols enclosed in quotation marks are ASCII codes.):

Sending commands

from the PC, etc.

Status code

from the projector

Description

‘30’ ‘30’ ‘72’ ‘30’ ‘39’ ‘0D’

00r09

Command operating the same

as the MENU button

‘30’ ‘30’ ‘72’ ‘30’ ‘39’ ‘0D’

00r09

Command receipt confirmation

(Command echo back)

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4-2.Extended command

Note: This command set supports multi monitor control by daisy chained connection. This command

set will NOT be written in the user’s manual of MDT652S.

The command packet consists of four parts, Header, Message, Check code and Delimiter.

Sequence of a typical procedure to control a monitor is as follows,

[A controller and a monitor, two-way communication composition figure]

Header Message Check Code Delimiter

MonitorController

eader

Messa

Check CodeDelimiter

eader Message Check Code

elimiter

Get Parameter

Get Parameter Reply

eader

Messa

Check CodeDelimiter

Set Parameter

eader Message Check Code

elimiter

Set Parameter Reply

eader

Messa

Check CodeDelimiter

eader Message Check Code

elimiter

Get Parameter Reply

Save Current Setting Comman

Get Parameter

eader

Messa

Check CodeDelimiter

The controller sends a command to

get a value from the monitor that

you want to change.

The monitor replies with the

current value of the requested

item.

The controller sends commands to

set an adjusted value.

The monitor replies to the

controller for confirmation.

The controller sends a command to

get a value for confirmation.

The monitor replies with an

adjusted value.

The controller requests to store

the adjusted value to the monitor.

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4.1 Header block format (fixed length)

byte) SOH: Start of Header

ASCII SOH (01h)

byte) Reserved: Reserved for future extensions.

MDT652S must be ASCII '0'(30h)

byte) Destination: Destination equipment ID. (Receiver)

Specify a command’s receiver’s address.

If the command should be sent to certain monitor only, the either of character ‘A’(41h) to ‘Z’(5Ah)

which is corresponding to monitor ID from No1 to No.26 should be set to this portion. If it

is a broad cast command(only “set command” is available), then the ’*’(2Ah)should be applied.

byte) Source: Source equipment ID. (Sender)

Specify a sender address.

The controller must be ‘0’(30h).

byte) Message Type: (Case sensitive.)

Refer to section 4.2 “Message block format” for more details.

ASCII 'A' (41h): Command

ASCII 'B' (42h): Command reply.

ASCII 'C' (43h): Get current parameter from a monitor.

ASCII 'D' (44h): "Get parameter" reply.

ASCII 'E' (45h): Set parameter.

ASCII 'F' (46h): "Set parameter" reply.

-7

bytes) Message Length:

Specify the length of the message (that follows the header) from STX to ETX.

This length includes STX and ETX.

The byte data must be encoded to ASCII characters.

Ex.) The byte data 3Ah must be encoded to ASCII characters '3' and 'A' (33h and 41h).

The byte data 0Bh must be encoded to ASCII characters '0' and 'B' (30h and 42h).

Header Message Check code Delimiter

SOH Reserved

'0' Destination

'A' Source Message

Type Message

Length

-7

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4.2 Message block format

“Message block format” is allied to the “Message Type” in the “Header”.

Refer to the section 6 “Message format” for more detail.

）

Get current parameter

The controller sends this message when you want to get the status of the monitor.

For the status that you want to get, specify the “OP code page” and “OP code”,

refer to “Appendix A. Operation code table”.

“Message format” of the “Get current parameter” is as follows;



Refer to section 5.1 “Get current parameter from a monitor.” for more details.

）

Get Parameter reply

The monitor will reply with the status of the requested item specified by the controller

in the “Get parameter message”.

“Message format” of the “Get parameter reply” is as follows;



Refer to section 5.2 “Get parameter reply” for more details.

）

Set parameter

The controller sends this message to change a setting of the monitor.

Message format of the “Set parameter” is as follows;



Refer to section 5.3 “Set parameter” for more details.

）

Set Parameter reply

The monitor replies with this message for a confirmation of the “Set parameter message”.

Message format of the “Set parameter reply” is as follows;

Result OP code page OP code Type Max value Requested setting

Value ETX

STX Hi Lo Hi Lo Hi Lo Hi Lo MSB LSB MSB LSB



Refer to section 5.4 “Set parameter reply” for more details.

）

Command

“Command message” format depends on each command.

Usually, this “command message” is used for some non-slider controls and some special operations,

such as “Save current settings”, “Get timing report”, “power control”, “Schedule”, etc. Refer to

section 5.5 “Commands message” for more details.

Header Message Check code Delimiter

OP code page OP code

STX Hi Lo Hi Lo

ETX

Result OP code page OP code Type Max value Current Value

STX Hi Lo Hi Lo Hi Lo Hi Lo MSB LSB MSB LSB

ETX

OP code page OP code Set Value

STX Hi Lo Hi Lo MSB LSB ETX

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