PWRSTEP.New()

Type: CLASS FUNCTION

Purpose: Create a new PwrStep signal object.

Usage:

Signal = PWRSTEP.New (Tag
,Pstat
,Value1
,LimitValue1
,Value2
,LimitValue2
,Gain
,MinDif
,MaxStep
,TimeStep1
,TimeStep2
,SamplePeriod
,PerturbationRate
,PerturbationPulseWidth
,TimerRes
,Mode
,WorkingPositive
)
Tag STRING

Tag for object identification

Pstat PSTAT Pstat is an object with a PSTAT license.
Value1 REAL The first value to be set by the signal object. The units of this value depend upon the mode selected. The units are either volts, amperes, ohms, or watts.
LimitValue1 REAL

This value is used to specify a limit used in calculating the signal.

It is not used for

PWR_MODE_CURRENT_DISCHARGE or

PWR_MODE_CURRENT_CHARGE. Enter 0.0.

For PWR_MODE_VOLTAGE it is the maximum current to be encountered, entered in amperes.

For PWR_MODE_POWER it is the minimum voltage to be encountered, entered in volts.

For PWR_MODE_RESISTANCE it is the maximum voltage to be encountered, entered in volts.

Value2 REAL The second value to be set by the signal object. The units of this value depend upon the mode selected. The units are either volts, amperes, ohms, or watts.
LimitValue2 REAL

This value is used to specify a limit used in calculating the signal.

It is not used for

PWR_MODE_CURRENT_DISCHARGE or

PWR_MODE_CURRENT_CHARGE. Enter 0.0.

For PWR_MODE_VOLTAGE it is the maximum current to be encountered, entered in amperes.

For PWR_MODE_POWER it is the minimum voltage to be encountered, entered in volts.

For PWR_MODE_RESISTANCE it is the maximum voltage to be encountered, entered in volts.

Gain REAL

This is the gain used during the feedback loop. It should be left at the default value,

PWR800_DEFAULT_GAIN

MinDif REAL

This is the percentage above/below the nominal value, used during a perturbation. The nominal value is the current that is being applied by the signal. It is entered as a decimal where 1.0 = 100%. It should be left at the default value,

PWR800_DEFAULT_MINIMUM_DIFFERENCE

MaxStep REAL

This is the percentage of full scale that is used to limit the maximum step in current during the feedback loop. The I/E current range determines the full-scale value. The percentage is entered as a decimal where 1.0 = 100% of the scale. It should be left at the default value.

PWR800_DEFAULT_MAXIMUM_STEP

TimeStep1 REAL This is the time that the first step of the signal is to be applied, entered in seconds.
TimeStep2 REAL This is the time that the second step of the signal is to be applied, entered in seconds.
SamplePeriod REAL This is the sample period, entered in seconds. This signal performs a feedback loop. The TimerRes determines the speed of the timer. The SamplePeriod determines the timing of output points.
PerturbationRate REAL

This is the time, entered in seconds, between perturbations of the signal. A perturbation is an increase followed by a matching decrease in the applied signal value. This perturbation allows the signal to determine the response of the cell so that the feedback loop can work properly. Perturbations are only necessary in feedback modes. These modes are PWR_MODE_RESISTANCE, PWR_MODE_POWER, and PWR_MODE_VOLTAGE. Perturbations are skipped if the control algorithm determines they are not necessary. This value should be left at the default value.

PWR800_DEFAULT_PERTURBATION_RATE

PerturbationPulseWidth REAL

This is the width of a perturbation, entered in seconds. A perturbation includes both an increase and a decrease, each will be held for this amount of time. This should be left at the default value.

PWR800_DEFAULT_PERTURBATION_WIDTH

TimerRes REAL

This is the fundamental timer setting of the instrument in seconds. It should be left at the default.

PWR800_DEFAULT_TIMER_RESOLUTION

ModeStep1 INDEX

This is the control mode of the first step of the signal. The following constants are valid values.

PWR_MODE_CURRENT_DISCHARGE

PWR_MODE_RESISTANCE

PWR_MODE_POWER

PWR_MODE_VOLTAGE

PWR_MODE_CURRENT_CHARGE

ModeStep2 INDEX

This is the control mode of the second step of the signal. The following constants are valid values.

PWR_MODE_CURRENT_DISCHARGE

PWR_MODE_RESISTANCE

PWR_MODE_POWER

PWR_MODE_VOLTAGE

PWR_MODE_CURRENT_CHARGE

WorkingPositive BOOL

This value specifies if the working connection is connected to the positive or negative terminal.

TRUE = Working connected to positive terminal

FALSE = Working connected to negative terminal

Signal OBJECT The created PWRSTEP object.

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