FB_DALIV2QueryBallast
The block provides information as to whether a specific ballast is ready for operation.
Using this command, it can easily be determined whether or not any ballasts at all are connected to a DALI line. To do this, the block with the parameter eAddrType = eDALIV2AddrTypeBroadcast is called. If the output bBallast is FALSE and output nError is 0, there is no ballast connected to the DALI line. If the output nError is 0 and the output bBallast is TRUE, there is exactly one ballast connected to the DALI line. If several ballasts are connected, nError will return 5 (several ballasts have replied). In this case it is irrelevant whether or not the ballasts have short addresses.
VAR_INPUT
bStart : BOOL;
nAddr : BYTE;
eAddrType : E_DALIV2AddrType := eDALIV2AddrTypeShort;
eCommandPriority : E_DALIV2CommandPriority := eDALIV2CommandPriorityMiddle;
bStart: The block is activated by a rising edge at this input.
nAddr: The address of a participating device or of a group.
eAddrType: Short address, group address or broadcast.
eCommandPriority: The priority (high, middle, low) this command has when executed by the library.
VAR_OUTPUT
bBusy : BOOL;
bError : BOOL;
nErrorId : UDINT;
bBallast : BOOL;
bBusy: When the block is activated the output is set, and it remains active until execution of the command has been completed.
bError: This output is switched to TRUE if an error occurs during the execution of a command. The command-specific error code is contained in nErrorId. Is reset to FALSE by the execution of an instruction at the inputs.
nErrorId: Contains the command-specific error code of the most recently executed command. Is reset to 0 by the execution of an instruction at the inputs. See Error codes.
bBallast: If the output is active, the corresponding ballast is ready for operation.
VAR_IN_OUT
stCommandBuffer : ST_DALIV2CommandBuffer;
stCommandBuffer: A reference to the structure for communication with the FB_DALIV2Communication() (KL6811) or FB_KL6821Communication() (KL6821) block.