DAIKIN_EKMBDXB7V1_IDU_COM_STATES

DAIKIN_EKMBDXB7V1_IDU_COM_STATES (FB)

FUNCTION_BLOCK DAIKIN_EKMBDXB7V1_IDU_COM_STATES

Representation

Short description

Acquisition of the communication 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 specifications, 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!!! Taking the tested transmission parameters into account, the time 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 with current values. All registers read with FC03 are only available with current values once during each restart of the gateway

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In this FB the messages Connected and Communication error of all up to 64 indoor units are acquired and evaluated. The current states are available in the arrays arxIndoorUnits_ConState (state Connected), arxIndoorUnits_ComState (state Communication error) and arxIndoorUnits_ReadWriteState (write and read permission) separately for each indoor unit.

InOut:

Scope	Name	Type	Initial	Comment
Input	xEn	BOOL	TRUE	Enable / disable communication (TRUE = enable)
Input	byUnitId	BYTE	0	Address of the device (interface) (1 .. 15)
Input	xUpdateStates	BOOL	FALSE	Update of the states (on each rising edge)
Input	xResError	BOOL	FALSE	Reinitialization of the output eErrorCodeCom (with every rising edge)
Inout	ModbusClient	ModbusClientBase		Client of the device
Output	xInterfaceState	BOOL	FALSE	State of the interface
Output	xOtherDIIIUnitPresent	BOOL	FALSE	Information whether another DIII unit (in addition to this interface) is present
Output	arxIndoorUnits_ConState	ARRAY [1 .. 4, 0 .. 15] OF BOOL		FALSE: No TRUE: Yes (default value) Array with the connection states of the indoor units of all groups (1-00 … 4-15) 1st dimension: group, 2nd dimension: number of the indoor unit Array element = FALSE: no connection to the indoor unit Array element = TRUE: connection to the indoor unit
Output	arxIndoorUnits_ComState	ARRAY [1 .. 4, 0 .. 15] OF BOOL		Array with the communication states of the indoor units of all groups (1-00 … 4-15) 1st dimension: group, 2nd dimension: number of the indoor unit Array element = FALSE: no communication error Array element = TRUE: communication error
Output	arxIndoorUnits_ReadWriteState	ARRAY [1 .. 4, 0 .. 15] OF BOOL		Array with the read/write permissions of the indoor units of all groups (1-00 … 4-15) 1st dimension: group, 2nd dimension: number of the indoor unit Array element = FALSE: no read/write permission Array element = TRUE: read/write permission
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	tTimeUpdateStates	TIME	TIME#3s0ms	Update interval for the processes influenced by the input xUpdateStates influenced