FB_Ramp

VAR_INPUT

bEnable           : BOOL;
bOn               : BOOL;
bOff              : BOOL;
bToggle           : BOOL;
bStart            : BOOL;
nEndLevel         : BYTE;
tRampTime         : TIME := t#10s;
nOptions          : DWORD;

bEnable: The bOn, bOff, bToggle and bStart inputs are active as long as this input is TRUE. A negative state deactivates the inputs and resets the function block.

bOn: A rising edge directly switches nLightLevel to the maximum value (32767).

bOff: A rising edge directly switches nLightLevel to "0".

bToggle: Switches the light state between On (32767) and Off (0).

bStart: If a rising edge is applied to this input, the light is dimmed up or down from the current value to nEndLevel. The time required for this is defined by tRampTime. The dimming procedure can be interrupted at any time by bOn, bOff or bToggle.

nEndLevel: Target value of the dimming procedure.

tRampTime: Ramp time, see bStart. (Preset value: 10 seconds).

nOptions: Reserved for future developments.

VAR_OUTPUT

bLight            : BOOL;
bBusy             : BOOL;
bError            : BOOL;
nErrorId          : UDINT;

bLight: This output is set as long as nLightLevel is greater than 0.

bBusy: This output is always active as long as the processing of a command (bOn, bOff, bToggle or ramp) is active.

bError: This output is switched to TRUE as soon as 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 a command at the inputs.

nErrorId: Contains the command-specific error code of the most recently executed command. Is reset to "0" by the execution of a command at the inputs. See Error codes.

VAR_IN_OUT

nLightLevel           : UINT;

nLightLevel: Output control value of the function block and reference to the light output value. This value is defined as In-Out variable because the function block reads and writes the light value.

Requirements