Mscs Protocol - Orion ODC-10000 User Manual

ORION PDP
7.

MSCS Protocol

1. Introduction
ThischaptercontainsthecommunicationprotocolbetweenLCDanditscontroldevicessuchascomputerforbetter
useoftheproduct.However,itdoesnotincludedetailedtechnicalmatters.Itratherfocusesonthebrieffunctional
explanationandcommunicationprotocol.
Controller Tx/Rx Line ID:1
(Computer)
Master Slave
ID:N+1
Master Slave
ID:(M-2)N+1
Master Slave
ID:(M-1)N
Master Slave
※Theconnectioncanbevariablebasedonenvironmentortheusers'intention.
<Communicationconnectiondiagram>
1.1. Communication Setting
- Transmission & Reception type: Asynchronous Serial Communication
- Connection type: Daisy Chain
- Baudrate : 115200
- Data Bits : 8
- Parity : None
- Stop Bits : 1
- Flow Control : None
2. Protocol Format
2.1. Send To LCD
STX Command Length Data
1 byte 1 byte 1 byte Variable
ID Master
1 byte 1 byte
 - ThisishowtosendcommandstoLCD.OnlythesetofthedesignatedIDisworkingaccordingtothe"Command."
But,ifthe"ID"valueis"0",allMLCDsetsareworkingaccordingtocommandas"Broadcast".
 - STX(0x02):Theinitialcode.ItmeansthebeginningofProtocol.(Fixedvalue)
 - Command:Codeforactualoperation.(Variable)
 - Length:thelengthof"Data"area.(Variable:0~255)
 - Data:theareasfor"ID"andtheotherData(Variable)
 - ID:ItisacodetodistinguishLCDsets.Itsrangeis"0"to"255".IftheIDis"0,"itmeansBroadcastcommand.(variable)
ID:2 ID:N-1 ID:N
Master Slave Master Slave Master Slave
ID:N+N
Master Slave
ID:(M-2)N+N
Master Slave
ID:(M-1)N+2 ID:(M-1)N+N-1 ID:MXN
Master Slave Master Slave Master Slave
ETX
1 byte
Other Data
N byte
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 - Master(0x01):Thisisthescalercode.
 - ETX(0x03):Theendofthecode.(Fixedvalue)
2.2. receive From LCD
STX CMD Length Data
1 byte 1 byte 1 byte Variable
ID Master
1 byte 1 byte
 - ResponsebyacertaincommandfromthedesignatedsetamongMLCDsets.Thedifferencefrom"SendtoLCD"is"Checksum".
 - STX(0x02):Theinitialcode.ItmeansthebeginningofProtocol.(Fixedvalue)
 - Command:Codeforactualoperation.(Variable)
 - Length:thelengthof"Data"area.(Variable:0~255)
 - Data:theareasfor"ID"andtheotherData(Variable)
 - ID:Setidentification(0~255)(Variable)
 - Master(0x01):Thisisthescalercode.
 - Checksum:execute"Not"operationafteraddingallthevaluesin"STX~Data"area.
 - ETX(0x03):Theendofthecode.(Fixedvalue))
- Communication Sequence
*Waitfor50msecforresponseaftersendingthecommand.Ifthereisnoresponse,itisrecommendedtoresendthecommand.
*Itisrecommendedthatnotsendingtheothercommandorchanginginputresolutionduringcommandtransmission.
→
Command transmission
←
3. Command
3.1. Power On
- Command for Power On: Operative status
- It is available only during Power Off(Stand-by) status.
- Send to MLCD
A. Normalcommand
STX CMD Length
Value 0x02 0x40 0x02
*IDrange(Program):0x01(1)~0xFF(255)
B. Broadcastcommand
STX CMD Length
Value 0x02 0x40 0x01
*MakeallLCDdothesameoperation.But,therewillbenoreturncommunication.(Onewaycommand)
- Receive from MLCD
STX CMD Length
Value 0x02 0x40 0x02
*IDrange(Program):0x01(1)~0xFF(255)
*Checksum:execute"Not"operationafteraddingallthevaluesin"STX~Data"area.
MLCD
Infinitely Expandable
Check Sum ETX
1 byte 1 byte
Other Data
N byte
Responsetransmission
Data
ETX
ID Master
Variable 0x01 0x03
Data: ID ETX
0x00 0x03
Data
Check Sum ETX
ID Master
Variable 0x01 Variable 0x03
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