PLC-API The programmer must create an array, ARRAY [ 1.. n ] of FLOAT, in which the function block can store the data that it requires internally. VAR_INPUT VAR_INPUT fIn : FLOAT; fManSyncValue : FLOAT; bSync : BOOL; eMode : E_CTRL_MODE; bHold : BOOL; END_VAR fIn : Input variable for the moving average filter. fManSyncValue : Input value to which the moving average filter can be set, or that is issued at the output in manual mode. bSync : A rising edge at this input sets the moving average filter to the value fManSyncValue. eMode : Input that specifies the block's operating mode [ } 16] . bHold :
A TRUE at this input will hold the internal state (and therefore also the output) constant at its current value, independently of the input value. VAR_OUTPUT VAR_OUTPUT fOut : FLOAT; eState : E_CTRL_STATE; eErrorId : E_CTRL_ERRORCODES; bError : BOOL; END_VAR fOut : Output of the moving average filter. eState : State of the function block. eErrorId : Supplies the 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_MOVING_AVERAGE_PARAMS; END_VAR stParams : Parameter structure of the moving average filter. This consists of the following elements: TYPE ST_CTRL_MOVING_AVERAGE_PARAMS:
STRUCT tCtrlCycleTime : TIME := T#0ms; (* controller cycle time [TIME] *) tTaskCycleTime : TIME := T#0ms; (* task cycle time [TIME] *) nSamplesToFilter : UINT; pWorkArray_ADR : POINTER TO FLOAT := 0; nWorkArray_SIZEOF : UINT := 0; 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 83 Version: 1.1