艾默生CM+空调通信协议Liebert

TRADE SECRET AND CONFIDENTIAL INFORMATION AGREEMENTThis agreement is made on the day of 2001.Betbeen(“A”)Liebert Corporation Australia Pty limited (“B”)A acknowledges receipt fromB a copy of the LECS 15 Communication protocol on the day of 2001, whice is to be used only in the air-conditioner remote monitoring system ofA hereby confirms that it will preserve and maintain in confidence the intellectual property rights of the Protocol, and undertakes not to disadvantageB Commercially in anyway through its possession of the Protocol.B agrees to assist A in the implementation of the remote monitoring system.A: B:Liebert Corporation Australia Pty Ltd Stamped: Stamped:Signature: Signature:Date: Date:LECS 15 COMMUNICA TIONS PROTOCOL1. Date FormatThe port receives and transmits at standard RS232 signal levels. For multiple unit operation diodes may need to be included in the transmit data ( of LECS 15 control ) to prevent data conflict.Serial data is transmitted and received at 1200 baud.8 data1 stopNo parityData is received in a strict block format and any data received which does not conform to this format is ignored by the control.The first byte in the transmitted block contains the unit no. which is being addressed. The unit number corresponds to the unit no. Displayed on the LECS 15 control panel.2. Control FunctionsThis is 5 bytes message sent to the LECS 15 control.Byte 1-( Unit Number-1 ) XOR f0h,e,g,foh for unit no. 1Byte 2-Control Request 11hex ( ascii DCI char )Byte 3-Nnmber of bytes to follow in this message02h in this casebyte 4-Control function No.called reactivate.00h remote on-also01h remote off02h alarm muteByte 5-Checksum the least significant byte of the binary sum of bytes 1 to 4. UNITNO is the unit number polled;TEMP is the control function number.Response from LECS 15 control.The control will acknowledge the control function request with a 4 b yte message. Byte 1-unit number ( F0h-92h ) ( see ‘ Control Functions’)Byte 2-ACK character (06h)Byte 3-number of bytes following (01h)Byte 4-checksum of bytes 1 to 33. Enquiry FunctionsThere is a 5 or more byte message sent to the LECS 15 control.Byte 1-(unit Number – 1) XOR f0h, e.g.f0h for unit no. 1Byte 2-Enquiry Request 05h (Enq ASCll char)Byte 3-Number of bytes to follow in this message(n+2)Byte 4- Enquiry function no.00h status dump instantaneous temp & humidity01h status dump averaged temp & hum02h ROM data/time dump03h 48 hour data dumpByte 4 + n – data necessary for each enquiry function request n bytes longByte 4 + n + 1 – checksumEnquiry Function request and response.a) 00h status dump with instantaneous temps & humidity01h status dump with averaged temp & humidityn=0 in the message, xo the request is 5 bytes longByte 1-(unit Number – 1) XOR f0h, e.g.f0h for unit no. 1Byte 2-Enquiry Request 06h (Ack ASCll char)Byte 3-Number of bytes to follow in this message 29hByte 4-Controller type and ON/OFF statusBit 0 =－> Unit ONBit 1 =－> Alarm Buzzer OnBit 7 =－> Data Chiller Unit －> LECS15 unitBit 2 to 6－UndefinedByte 5,6－(T emperature * 10) in BCD HI/O byte format.Byte 9 to 11－Alarm Bytes (see ‘Alarm Codes’)Byte 12－T emperature and Humidity SetpointT emp = 17 + ((Byte 12) AND f0h)/16 Deg CHum = 42 + ((Byte 12) AND 0fh)*2% rHByte 13 to 16－Keyboard Data (see ‘Keyboard Bytes’)Byte 17 to 22－I/O Port Data (see ‘I/O Port Bytes’)Byte 23,24－Cooling System Hours (HI/LP Bytes)Byte 25.26－Humidity System Hours (HI/LP Bytes)Byte 27,28－Air System hours (HI/LP Bytes)Byte 29－Checksum = (SUM(Byte 1 to 28)) and ffh.b) 02h ROM date time dumpn = 0－> 5 byte messagec) 03h－data Dump from internal RamFor this case 2 bytes follow byte #4. This function retrieves at most 30*2 minute records (1 hour) starting from the record indicate by the 2 bytes following byte 4. This umber is the binary representation of the first two minute data record to be retrieved.Note1－the first record dumped is the most recent.Note2－if the RAM has been reset by powering up the dip switch (No.9) on, then a record may be <50’2 min records long.Note3－the maximum number of records if 1440.Note－any record with a zero value for bytes 5 should be ignored, and that record only serves as a place marker the dump while the unit was turned off.Alarm CodesAlarm are contained in Bytes 9 to 11 of the Status enquiry reply and Bytes 5 to 7 of each 2 minute record in the Data Dump reply. The ordering of the alarm bytes is the same in both replies. Starting with the first byte. The interpretation of the alarm bytes follow.Alarm Byte 1－Bit -+ 0－> T emp HighBit 1 = 0－>T emp LoBit 0,1 = 00－>Sensor Board faultBit 2 = 0－>Hum HighBit 3 = 0－>Hum LowBit 4 = 0－>No Air FlowBit 5 = 0－>Water Under FloorAlarm Byte 2－Bit 1 = 0－> Compressor 1 High PressureBit 2 = 0－> Compressor 2 High PressureBit 3 = 0－>COOL modeBit 4 = 0－>HEAT modeBit 5 = 0－>HUMIDIFY modeBit 6 = 0－>De HUMIDIFY modeAlarm Byte 3－Bit 0 = 0－> System Service requiredBit 1 = 0－> System Service requiredBit 2 = 0－> System Service requiredBit 3 = 0－> Water level LowBit 4 = 0－> Spare AlarmBit 5 = 0－> Spare AlarmBit 6 = 0－> Spare AlarmBit 7 = 0－> Mains Power FailureI/O Port BytesThe state of the I/O ports are contained in bytes 17 to 22 of the Status Enquiry reply. The interpretation of these Bytes are as follows.I/O Byte 1－Bit 5 = 1－> Remote Shutdown enabledI/O Byte 2－Bit 3 = 1－> Compressor 1 onBit 4 = 1－> Compressor 2 onBit 5 = 1－> Heater 1 onBit 6 = 1－> Heater 2 onBit 7 = 1－> Hot Gas By-Pass onI/O Byte 3－Bit 4 to 7－Chilled Water Value Opening% open = (((I/O Byte 3) AND f0h)/16)/15*100I/O Byte 4－Bit 0 = 1－> Flush Value OpenBit 1 = 1－> Humidifier OnBit 2 = 1－> DeHum Fan mode OnBit 4 = 1－> Fan OnI/O Byte 5－Bit 0 = 0－>Secondary Unit EnabledI/O Byte 6－Not applicableKeyboard BytesThese are contained in bytes 13 to 18.KBD Byte 1－Bit 2 = 0－> 1 Deg C & 5%rH Differential = 1－> Deg C & 10%rH Differential KBD Byte 2－Bit 2,3 = 00－> 5 sec flush time= 10－> 10 sec flush time= 01－> 20 sec flush time。