FB_CTRL_ZERO_ZONE_DAMPING
This function block enables zero point damping to be realized in order to minimize control interventions in the range | actual value - setpoint | < ε.
Transfer behavior in the time range
VAR_INPUT
VAR_INPUT
fSetpointValue : FLOAT;
fActualValue : FLOAT;
eMode : E_CTRL_MODE;
END_VAR
Name | Type | Description |
|---|---|---|
fSetpointValue | FLOAT | Setpoint of the controlled variable |
fActualValue | FLOAT | Actual value of the controlled variable |
eMode | E_CTRL_MODE | Input that specifies the operation mode of the function block. |
VAR_OUTPUT
VAR_OUTPUT
fSetpointValueOut : FLOAT;
fActualValueOut : FLOAT;
eState : E_CTRL_STATE;
eErrorId : E_CTRL_ERRORCODES;
bError : BOOL;
END_VAR
Name | Type | Description |
|---|---|---|
fSetpointValue | FLOAT | Filtered setpoint to controller |
fActualValueOut | FLOAT | Actual value to controller |
eState | E_CTRL_STATE | State of the function block |
eErrorId | E_CTRL_ERRORCODES | Supplies the error number when the output |
bError | BOOL | Becomes TRUE, as soon as an error occurs. |
VAR_IN_OUT
VAR_IN_OUT
stParams : ST_CTRL_ZERO_ZONE_DAMPING_PARAMS;
END_VAR
Name | Type | Description |
|---|---|---|
stParams | ST_CTRL_ZERO_ZONE_ | Parameter structure of the transfer element |
stParams consists of the following elements:
TYPE
ST_CTRL_PI_PST_CTRL_ZERO_ZONE_DAMPING_PARAMS :
STRUCT
tCtrlCycleTime : TIME := T#0ms;
tTaskCycleTime : TIME := T#0ms;
fDampingCoefficient : FLOAT := 0.0;
END_STRUCT
END_TYPE
Name | Type | Description |
|---|---|---|
tCtrlCycleTime | TIME | Cycle time with which the control loop is processed. This must be greater than or equal to the TaskCycleTime. The function block uses this input value to calculate internally whether the state and the output values have to be updated in the current cycle. |
tTaskCycleTime | TIME | Cycle time with which the function block is called. If the function block is called in every cycle this corresponds to the task cycle time of the calling task. |
fDampingCo | FLOAT | The parameter corresponds to |