ST_TcMcAutoIdent

	Available from version 3.0.4

In this structure the parameters for an MC_AxUtiAutoIdent_BkPlcMc function block are stored. It contains further information about the purpose of the individual elements.

Syntax

TYPE ST_TcMcAutoIdent :
(* last modification: 08.11.2019 *)
STRUCT
     EndOfTravel_Negativ:        LREAL:=0.0;
     EndOfTravel_Positiv:        LREAL:=0.0;
     EndOfTravel_NegativLimit:   LREAL:=0.0;
     EndOfTravel_PositivLimit:   LREAL:=0.0;
     DecelerationFactor:         LREAL:=1.0;
     EndOfVelocity_NegativLimit: LREAL:=0.0;
     EndOfVelocity_PositivLimit: LREAL:=0.0;
     EndOfTravel_LastIdent_P:    LREAL:=0.0;
     EndOfTravel_LastIdent_M:    LREAL:=0.0;
     ValveCharacteristicLowEnd:  LREAL:=0.0;
     ValveCharacteristicHighEnd: LREAL:=0.0;
     ValveCharacteristicRamp:    LREAL:=0.0;
     ValveCharacteristicSettling:LREAL:=0.0; (* starting with V3.0.32 *)
     ValveCharacteristicRecovery:LREAL:=0.0;
     ValveCharacteristicMinCycle:LREAL:=0.0;

     Valve_LinLimitP: LREAL:=0.0;   (* starting with V3.0.46 *)
     Valve_LinLimitM: LREAL:=0.0;

     ValveCharacteristicTable:   ARRAY[1..100,1..2] OF LREAL;

     EndOfIncrements_Negativ:    DINT:=0;
     EndOfIncrements_Positiv:    DINT:=0;

     ValveCharacteristicType:    INT:=0; (* starting with V3.0.33 *)
     ValveCharacteristicTblCount:INT:=0;

     EnableEndOfTravel:          BOOL:=FALSE;
     EnableOverlap:              BOOL:=FALSE;
     EnableZeroAdjust:           BOOL:=FALSE;
     EnableArreaRatio:           BOOL:=FALSE;
     EndOfTravel_PositivDone:    BOOL:=FALSE;
     EndOfTravel_NegativDone:    BOOL:=FALSE;
     EnableValveCharacteristic:  BOOL:=FALSE;
     EnableNoUturn: BOOL:=FALSE;
END_STRUCT
END_TYPE

Parameter

Name	Type	Description
EndOfTravel_Negativ	LREAL	[mm] If determination of the travel limits is activated, this value is determined by the function block. If it is disabled, the application must specify the value here.
EndOfTravel_Positiv	LREAL	[mm] If determination of the travel limits is activated, this value is determined by the function block. If it is disabled, the application must specify the value here.
EndOfTravel_NegativLimit	LREAL	[V] This parameter limits negative output voltages.
EndOfTravel_PositivLimit	LREAL	[V] This parameter limits positive output voltages.
DecelerationFactor	LREAL	[1] After the measuring stroke, the axis is moved to the end of the measuring path for the next measuring stroke. The regular axis parameters fMaxAcc and fMaxDec, which are weighted with this factor, are used.
EndOfVelocity_NegativLimit	LREAL	[mm/s] This parameter limits negative velocities. If this velocity is reached or exceeded during the measurement, the current measurement is completed, but no further measurement in this direction is performed.
EndOfVelocity_PositivLimit	LREAL	[mm/s] This parameter limits positive velocities. If this velocity is reached or exceeded during the measurement, the current measurement is completed, but no further measurement in this direction is performed.
EndOfTravel_LastIdent_P	LREAL	No description available
EndOfTravel_LastIdent_M	LREAL	No description available
ValveCharacteristicLowEnd/ ValveCharacteristicHighEnd	LREAL	ValveCharacteristicMinCycle: [mm] The measurement travel is only valid if the measuring voltage was established before the axis has moved towards the center of the measuring distance defined by ValveCharacteristicHighEnd and ValveCharacteristicLowEnd by less than half its value. Otherwise the effective measuring distance (without ramps) is less than this distance, and this measurement and all further measurements in this direction are replaced by a value calculated using the reference velocity of the axis.
ValveCharacteristicRamp	LREAL	[s] This parameter specifies the ramp for establishing the measuring voltage for the characteristic curve determination. During the specified time the voltage is increased to 10 V. Since the actual voltages are generally lower, less time is usually required to establish the voltage. Please pay attention to the notes at the end of this document.
ValveCharacteristicSettling	LREAL	[s] Once the control value has been ramped up to the test level for the measurement, the starting of the measurement can be delayed through this parameter. If a lower velocity than at the previous measuring point is detected in the same direction during the measurement at a test output, a warning is issued regardless of the set logger limit. The measuring point is automatically corrected to avoid falling characteristic ranges. This correction has no influence on the validity of the characteristic curve. However, it should be checked whether the values in ValveCharacteristicRamp and ValveCharacteristicSettling are suitable for this axis.
ValveCharacteristicRecovery	LREAL	[s] This parameter defines a dwell time, which is adhered to before the measurement travel. This enables the supply to compensate a pressure drop that may have been caused by the previous measurement travel.
ValveCharacteristicMinCycle	LREAL	See description under ValveCharacteristicLowEnd/ ValveCharacteristicHighEnd
Valve_LinLimitP/ Valve_LinLimitM	LREAL	[mm/s] The lowest velocity for using the linearization table. For lower velocities, the characteristic curve is replaced by a straight line that connects the zero point with the point for the velocity specified here.
ValveCharacteristicTable	ARRAY	This ARRAY[1..2,1..100] contains the value pairs of the linearization table. ValveCharacteristicTable[nnn,1] is the normalized velocity value, ValveCharacteristicTable[nnn,2] is the normalized output value. Within the table, the value pairs with increasing index have increasing values for the velocity value and the output value. The first value pair therefore describes the fastest negative point, the last active value pair the fastest positive point. During automatic determination, the control voltage is limited to EndOfTravel_NegativLimit and EndOfTravel_PositivLimit and the velocity to EndOfVelocity_NegativLimit and EndOfVelocity_PositivLimit. The further points of the table are determined through extrapolation from the last two measuring points.
EndOfIncrements_Negativ	DINT	[1] If determination of the travel limits is activated, this value is determined by the function block. It then matches EndOfTravel_Negativ, but it is the raw encoder value in increments.
EndOfIncrements_Positiv	DINT	[1] If determination of the travel limits is activated, this value is determined by the function block. It then matches EndOfTravel_Positiv, but it is the raw encoder value in increments.
ValveCharacteristicType	INT	The identification can be adapted here to special valve variants or special conditions of the axis. See also E_TcMcValveType.
ValveCharacteristicTblCount	INT	This parameter specifies the number of value pairs to be determined in ValveCharacteristicTable. The value must be odd and between 3 and 99 (including).
EnableEndOfTravel	BOOL	If this boolean parameter is set, the mechanical travel limits are determined automatically. First, the system ensures that the axis can move freely or is at the positive function block. The axis is now moved with a negative control voltage until it has reached the function block. The axis is then operated with a positive control voltage until the positive function block has been detected. The control voltage is limited to EndOfTravel_NegativLimit and EndOfTravel_PositivLimit. If the positive travel limit falls below the negative limit, the values are swapped, and Axis.stAxParams.bDrive_Reversed is inverted.
EnableOverlap/ EnableZeroAdjust	BOOL	If one of these boolean parameter is set, the cover or the offset voltage of the valve is determined. Thus operation is influenced by EndOfTravel_Negative and EndOfTravel_Positive.
EnableArreaRatio	BOOL	If this boolean parameter is set, the direction-dependent velocity ratio is determined. First, the axis is moved into a position window, which is located between pStAxAutoParams. EndOfTravel_Positiv and pStAxAutoParams. EndOfTravel_Negativ, in the middle. The width of the window is 80% of the area defined by these parameters. Then, the axis is moved in positive and negative direction for one second with a control voltage of 1 V. The velocities determined during this movement are divided, in order to determine the velocity ratio.
EndOfTravel_PositivDone	BOOL	This signal is set by the function block if determination of the travel limits is disabled or the positive travel limit was determined.
EndOfTravel_NegativDone	BOOL	This signal is set by the function block if determination of the travel limits is disabled or the negative travel limit was determined.
EnableValveCharacteristic	BOOL	If this boolean parameter is set, the characteristic velocity curve is determined automatically.
EnableNoUturn	BOOL	No description available