DAIKIN_EKMBDXB7V1_IDU_ERROR_STATES

DAIKIN_EKMBDXB7V1_IDU_ERROR_STATES (FB)

FUNCTION_BLOCK DAIKIN_EKMBDXB7V1_IDU_ERROR_STATES

Short description

Detection of the error states of up to 64 Daikin indoor units Typical application: Central control of Daikin indoor units via the Daikin Modbus interface EKMBDXB7V1\

Guidelines - Software creation

The following function codes (FC) are supported: 3, 4, 6 and 16 The following transmission rates are supported: 9600 and 19200 bit/s For addressing, use the address values, not the register addresses (address = register - 1) The Modbus addresses 1 - 15 can be set directly on the DIP switches in the interface. In FC03 a maximum of 32 registers may be requested in one request telegram (deviating from the Modbus standard) In FC04 a maximum of 32 registers may be requested in one request telegram (deviating from the Modbus standard) In FC16 a maximum of 30 registers may be written in one request telegram (deviating from the Modbus standard) The following transmission parameters were tested: 19200 Baud, 8-N-1 The interface supports the following exception codes: 0x81, 0x82 and 0x83 The number of control commands per indoor unit is limited to 7000 / year !!! Considering the tested transmission parameters, the time interval between the end of the response telegram and the next request telegram must be at least 22.5 ms All registers read with FC04 are always available up to date All registers read with FC03 are available up to date only once during each gateway restart Procedure to change a setpoint (FC06 or FC16): &#xNAN;************** &#xNAN;* Functions * &#xNAN;************** In this FB the error states of all up to 64 indoor units are detected and evaluated (FC04: addresses 3600 - 3727 ) They are available in the array ‘arstIndoorUnits_ErrorStates’ separated per indoor unit as a structure element. The structure element of an indoor unit is only updated if the corresponding read/write authorization exists (input ‘arxIndoorUnits_ReadWriteState’). \

InOut:

Scope	Name	Type	Initial	Comment
Input	xEn	BOOL	TRUE	Enable / disable of communication ( TRUE = enabled )
Input	byUnitId	BYTE	0	Device (interface) address (1 .. 15)
Input	xUpdateActual	BOOL	FALSE	Update of actual values ( on each rising edge )
Input	xResError	BOOL	FALSE	Reinitialization of the output ‘eErrorCodeCom’ (on each rising edge)
Input	arxIndoorUnits_ReadWriteState	ARRAY [1..4, 0..15] OF BOOL		Array with the read/write authorizations of the indoor units of all groups (1-00 … 4-15) 1st dimension: group, 2nd dimension: indoor unit number Array element = FALSE: no read/write authorization Array element = TRUE: read/write authorization
Inout	ModbusClient	ModbusClientBase		Client of the device
Output	arstIndoorUnits_ErrorStates	ARRAY [1..4, 0..15] OF EKMBDXB7V1_ERROR_STATES		Array with the error states of the indoor units of all groups (1-00 … 4-15) 1st dimension: group, 2nd dimension: indoor unit number Array element = structure with the individual error states
Output	xAlarm	BOOL	FALSE	Collective fault ( TRUE = fault )
Output	xAlarmCom	BOOL	FALSE	Collective fault - communication ( TRUE = fault )
Output	eErrorCodeCom	ModbusErrorCode		Error code - communication ( 0 = no error )
Output	xBusy	BOOL		Communication indicator ( TRUE = communication )
Input Const	tTimeUpdateActual	TIME	TIME#3s0ms	Update interval for the processes affected by the input ‘xUpdateActual’