FB_DALIV2YCoordinateStepDown

FB_DALIV2YCoordinateStepDown 1:

The variable y-COORDINATE is reduced by 256 steps (256 / 65536) without cross-fading.

If the new color value does not correspond to a color that can be achieved by the DALI control gear, this must be indicated by bit 0 of COLOUR STATUS (xy-coordinate color point lies outside the valid range). The command is executed only if bit 4 of COLOUR STATUS (color representation xy-coordinate active) is set.

The function block supports the following color representations:

FB_DALIV2YCoordinateStepDown 2:

This command belongs to the application extended commands for lamps for the color/color temperature control with DALI interface. These only work if they are preceded by the Enable Device Type 8 command, which can be sent with the function block FB_DALIV2EnableDeviceType(). From version 2.6.0 of the libraries TcDALIV2 and TcDALIV2AppExtCmds, however, the Enable Device Type 8 command is internally placed automatically before all application extended commands for lamps for color/color temperature control with DALI interface.

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;

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.

VAR_IN_OUT

stCommandBuffer   : ST_DALIV2CommandBuffer;

stCommandBuffer: A reference to the structure for communication with the FB_DALIV2Communication() (KL6811) or FB_KL6821Communication() (KL6821) block.

Requirements

Development environment

Target system

Required libraries

TwinCAT 2.11 R3/x64 from Build 2244

PC/CX, BX or BC

TcDALIV2 library from V2.10.0