MLD-S Tech-FB Library Description - Bosch Rexroth

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Rexroth MLD-S Tech-FB Library MLD-S Technology Library 1-49 MX_ContinuousAdjustType02 Short Description Interface Description The function block enables the continuous adjustment of an influenced DINT-Variable using binary inputs. Fig. 1-66: FB MX_ContinuousAdjustType02 Name Type Comment VAR_INPUT Enable BOOL Enables the function block (cyclical, state-controlled) Inc BOOL Increment the influenced variable Dec BOOL Decrement the influenced variable Preset BOOL Set the Preset-Value (PresetValue) PresetValue DINT Specified value for Preset ModuloValue DINT Modulo value (if 0, then absolute processing) HighLimit DINT Maximum output value of the influenced variable LowLimit DINT Minimum output value of the influenced variable StepWidth REAL Increments StepsPerSec ond REAL Increments per second AdjTimeInterv als AdjWeightFa ctors ARRAY [1..4] OF REAL ARRAY [1..5] OF REAL Time intervals in seconds for weighting the alteration velocity Weighting factors of the alteration velocity VAR_OUTPUT InOperation BOOL No calculation active. Ouputs HighLimitAck and LowLimitAck are valid. Error BOOL Calculation of the influenced variable "Value" completed with error, output variable ErrorIdent is valid ErrorID ERROR_CODE Error short description ErrorIdent ERROR_STRUCT Detailed description of the diagnostics in case of an error Changing BOOL Calculation of the influenced variable takes place. Influenced variable "Value" is valid HighLimitAck BOOL Maximum output value of the influenced variable reached LowLimitAck BOOL Minimum output value of the influenced variable reached VAR_IN_OUT Value DINT Influenced variable Fig. 1-67: Interface of FB MX_ContinuousAdjustType02 DOK-MLD-S*-TechFB*****-AW01-EN-D
1-50 MLD-S Technology Library Rexroth MLD-S Tech-FB Library Fig. 1-68: Continuous Parameter Adjustment Functional Description The adjustment of the influenced variable, „Value“ may take place in positive or negative direction. The limits set a valid range for adjusting the variable. Specifying a modulo value allows the adjustment to be withing an axis‘ frame fo reference. Predefining increments and increments per second determines the alteration velocity of the influenced variable. It is possible to write a given value („PresetValue“), inside the valid operating range, directly to the influenced variable. After activation, with „Enable“, the influenced variable can be changed via inputs „Inc“ (positive direction) and „Dec“ (negative direction). While input „Inc“or Dec is set, the influenced variable is continuously increased (or decreased) with the given velocity. (StepsPerSecond * StepWidth). At initialization, ensure the inputs „ModuloValue“, „HighLimit“ and „LowLimit“, contain valid values. By determining weighting factors („AdjWeightFactors[]“) and the corresponding time intervals („AdjTimeIntervals[]“) it is possible to make time-dependent velocity modifications. The weighting factors and time intervals must also be set on the inputs „StepsPerSecond“ and „StepWidth“. Depending on the actual time interval, the alteration velocity is then multilpied with the appropriate weighting factor. The figure below shows the behavior of the block with an example configuration: The input factors of „AdjTimeIntervals“ ([T1; T2; T3; T4]) are specified in seconds. T5 specifies the period after completion of time interval T4 when the adjustment procedure aborts. The input factors of „AdjWeightFactors“ ([0,5; 1; 1,5; 2; 4]) determine the weighting of the alteration velocity. The last value of „AdjWeightFactors [5]“ is assigned to time interval T5. Fig. 1-69: WeightedAdjustment Note: When a time interval = 0, so the next weighting factor is used until the adjustment process aborts. Example: If DOK-MLD-S*-TechFB*****-AW01-EN-D
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MLD-S Tech-FB Library Description - Bosch Rexroth

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