PLC-API Transfer function (continuous): VAR_INPUT VAR_INPUT fIn : FLOAT; fManSyncValue : FLOAT; bSync : BOOL; eMode : E_CTRL_MODE; END_VAR fIn : Input of the D element. fManSyncValue : Input to which the D element can be synchronized, or whose value is present at the output in Manual Mode. bSync : A rising edge at this input sets the D element to the value fManSyncValue. eMode : Input that specifies the operation mode [ } 16] of the function block. VAR_OUTPUT VAR_OUTPUT fOut : FLOAT; eState : E_CTRL_STATE; eErrorId : E_CTRL_ERRORCODES; bError : BOOL; END_VAR fOut : Output of the D element. eState : State of the function block. nErrorID :
Returns the ADS error number [ } 16] when the bError output is set. bError: Becomes TRUE, as soon as an error occurs. VAR_IN_OUT VAR_IN_OUT stParams : ST_CTRL_D_PARAMS; END_VAR stParams : Parameter structure of the D element. This consists of the following elements: TYPE ST_CTRL_D_PARAMS : STRUCT tCtrlCycleTime : TIME := T#0ms; (* controller cycle time [TIME] *) tTaskCycleTime : TIME := T#0ms; (* task cycle time [TIME] *) tTv : TIME := T#0ms; (* derivative action time Tv *) tTd : TIME := T#0ms; (* derivative damping time Td *) fOutMaxLimit : FLOAT := 1E38; (* maximum output limit *) fOutMinLimit : FLOAT := -1E38; (* minimum output limit *) END_STRUCT END_TYPE tCtrlCycleTime :
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. TS4100 25 Version: 1.1