Simulink Reference

Block-Specific Parameters

These tables list block-specific parameters for all Simulink blocks. The type of the block appears in parentheses after the block name. Some Simulink blocks are implemented as masked subsystems. The tables indicate masked blocks by adding the designation "masked" after the block type.

Note    The type listed for nonmasked blocks is the value of the block's BlockType parameter; the type listed for masked blocks is the value of the block's MaskType parameter. For more information, see Mask Parameters.

The Dialog Box Prompt column indicates the text of the prompt for the parameter on the block's dialog box. The Values column shows the type of value required (scalar, vector, variable), the possible values (separated with a vertical line), and the default value (enclosed in braces).

Table 8-3: Continuous Library Block Parameters 

Block (Type)/Parameter	Dialog Box Prompt	Values
Derivative (Derivative) (no block-specific parameters)
Integrator (Integrator)
ExternalReset	External reset	{none} | rising | falling | either
InitialConditionSource	Initial condition source	{internal} | external
InitialCondition	Initial condition	scalar or vector {0}
LimitOutput	Limit output	{off} | on
UpperSaturationLimit	Upper saturation limit	scalar or vector {inf}
LowerSaturationLimit	Lower saturation limit	scalar or vector {-inf}
ShowSaturationPort	Show saturation port	{off} | on
ShowStatePort	Show state port	{off} | on
AbsoluteTolerance	Absolute tolerance	scalar {auto}
State-Space (StateSpace)
A	A	matrix {1}
B	B	matrix {1}
C	C	matrix {1}
D	D	matrix {1}
X0	Initial conditions	vector {0}
Transfer Fcn (TransferFcn)
Numerator	Numerator	vector or matrix {[1]}
Denominator	Denominator	vector {[1 1]}
Transport Delay (TransportDelay)
DelayTime	Time delay	scalar or vector {1}
InitialInput	Initial input	scalar or vector {0}
BufferSize	Initial buffer size	scalar {1024}
Variable Transport Delay (VariableTransportDelay)
MaximumDelay	Maximum delay	scalar or vector {10}
InitialInput	Initial input	scalar or vector {0}
MaximumPoints	Buffer size	scalar {1024}
Zero-Pole (ZeroPole)
Zeros	Zeros	vector {[1]}
Poles	Poles	vector {[0 -1]}
Gain	Gain	vector {[1]}

Table 8-4: Discontinuities Library Block Parameters 

Block (Type)/Parameter	Dialog Box Prompt	Values
Backlash (Backlash)
BacklashWidth	Deadband width	scalar or vector {1}
InitialOutput	Initial output	scalar or vector {0}
Coulomb & Viscous Friction (Coulombic and Viscous Friction) (masked)
Dead Zone (DeadZone)
LowerValue	Start of dead zone	scalar or vector {-0.5}
UpperValue	End of dead zone	scalar or vector {0.5}
Hit Crossing (HitCross)
HitCrossingOffset	Hit crossing offset	scalar or vector {0}
HitCrossingDirection	Hit crossing direction	rising | falling | {either}
ShowOutputPort	Show output port	{on} | off
Quantizer (Quantizer)
QuantizationInterval	Quantization interval	scalar or vector {0.5}
Rate Limiter (RateLimiter)
RisingSlewLimit	Rising slew rate	scalar or vector {1.}
FallingSlewLimit	Falling slew rate	scalar or vector {-1.}
Relay (Relay)
OnSwitchValue	Switch on point	scalar or vector {eps}
OffSwitchValue	Switch off point	scalar or vector {eps}
OnOutputValue	Output when on	scalar or vector {1}
OffOutputValue	Output when off	scalar or vector {0}
Saturation (Saturate)
UpperLimit	Upper limit	scalar or vector {0.5}
LowerLimit	Lower limit	scalar or vector {-0.5}

Table 8-5: Discrete Library Block Parameters 

Block (Type)/Parameter	Dialog Box Prompt	Values
Discrete Filter (DiscreteFilter)
Numerator	Numerator	vector {[1]}
Denominator	Denominator	vector {[1 2]}
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]
Discrete State-Space (DiscreteStateSpace)
A	A	matrix {1}
B	B	matrix {1}
C	C	matrix {1}
D	D	matrix {1}
X0	Initial conditions	vector {0}
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]
Discrete-Time Integrator (DiscreteIntegrator)
IntegratorMethod	Integrator method	{ForwardEuler} | BackwardEuler | Trapezoidal
ExternalReset	External reset	{none} | rising | falling | either
InitialConditionSource	Initial condition source	{internal} | external
InitialCondition	Initial condition	scalar or vector {0}
LimitOutput	Limit output	{off} | on
UpperSaturationLimit	Upper saturation limit	scalar or vector {inf}
LowerSaturationLimit	Lower saturation limit	scalar or vector {-inf}
ShowSaturationPort	Show saturation port	{off} | on
ShowStatePort	Show state port	{off} | on
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]
Discrete Transfer Fcn (DiscreteTransferFcn)
Numerator	Numerator	vector {[1]}
Denominator	Denominator	vector {[1 0.5]}
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]
Discrete Zero-Pole (DiscreteZeroPole)
Zeros	Zeros	vector {[1]}
Poles	Poles	vector [0 0.5]
Gain	Gain	scalar {1}
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]
First-Order Hold (First Order Hold) (masked)
Memory (Memory)
X0	Initial condition	scalar or vector {0}
InheritSampleTime	Inherit sample time	{off} | on
Unit Delay (UnitDelay)
X0	Initial condition	scalar or vector {0}
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]
Zero-Order Hold (ZeroOrderHold)
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]

Table 8-6: Look-Up Tables Block Parameters 

Block (Type)/Parameter	Dialog Box Prompt	Values
Look-Up Table (Lookup)
InputValues	Vector of input values	vector {[-5:5]}
OutputValues	Vector of output values	vector {tanh([-5:5])}
Look-Up Table (2-D) (Lookup Table (2-D)) (masked)
RowIndex	Row	vector
ColumnIndex	Column	vector
OutputValues	Table	2-D matrix

Table 8-7: Math Library Block Parameters 

Block (Type)/Parameter	Dialog Box Prompt	Values
Abs (Abs) (no block-specific parameters)
Algebraic Constraint (Algebraic Constraint) (masked)
Combinatorial Logic (CombinatorialLogic)
TruthTable	Truth table	matrix {[0 0;0 1;0 1;1 0;  0 1;1 0;1 0;1 1]}
Complex to Magnitude-Angle
Complex to Real-Imag
Dot Product (Dot Product) (masked)
Gain (Gain)
Gain	Gain	scalar or vector {1}
Logical Operator (Logic)
Operator	Operator	{AND} | OR | NAND | NOR | XOR | NOT
Inputs	Number of input ports	scalar {2}
Magnitude-Angle to Complex
Math Function (Math)
Operator	Function	{exp} | log | log10 | square | sqrt | pow | reciprocal | hypot | rem | mod
Matrix Gain (Matrix Gain) (masked)
MinMax (MinMax)
Function	Function	{min} | max
Inputs	Number of input ports	scalar {1}
Product (Product)
Inputs	Number of inputs	scalar {2}
Relational Operator (RelationalOperator)
Operator	Operator	== | != | < | {<=} | >= | >
Relational Operator (RelationalOperator)
Operator	Operator	== | != | < | {<=} | >= | >
Rounding Function (Rounding)
Operator	Function	{floor} | ceil | round | fix
Sign (Signum) (no block-specific parameters)
Slider Gain (SliderGain) (masked)
Sum (Sum)
Inputs	List of signs	scalar or list of signs {++}
Trigonometric Function (Trigonometry)
Operator	Function	{sin} | cos | tan | asin | acos | atan | atan2 | sinh | cosh | tanh

Table 8-8: Model-Wide Utilities 

Block (Type)/Parameter	Dialog Box Prompt	Values
Model Info (CMBlock) (mask)

Table 8-9: Ports & Subsystems 

Block (Type)/Parameter	Dialog Box Prompt	Values
Configurable Subsystem (mask)
Choice	Block choice	string
LibraryName	Library name	string
Enable (EnablePort)
StatesWhenEnabling	States when enabling	{held} | reset
ShowOutputPort	Show output port	{off} | on
In (Inport)
Port	Port number	scalar {1}
PortWidth	Port width	scalar {-1}
SampleTime	Sample time	scalar (sample period) {-1} or vector [period offset]
Out (Outport)
Port	Port number	scalar {1}
OutputWhenDisabled	Output when disabled	{held} | reset
InitialOutput	Initial output	scalar or vector {0}
Subsystem (SubSystem)
ShowPortLabels	Show/Hide Port Labels Format menu item	{on} | off
Terminator (Terminator) (no block-specific parameters)
Trigger (TriggerPort)
TriggerType	Trigger type	{rising} | falling | either | function-call
ShowOutputPort	Show output port	{off} | on

Table 8-10: Signal Attributes

Block (Type)/Parameter	Dialog Box Prompt	Values
Data Type Conversion
IC (InitialCondition)
Value	Initial value	scalar or vector {1}
Width (Width) (no block-specific parameters)

Table 8-11: Signal Routing 

Block (Type)/Parameter	Dialog Box Prompt	Values
Bus Selector (BusSelector)
InputSignals		Cell array of the input signals nested to reflect the signal hierarchy
Data Store Memory (DataStoreMemory)
DataStoreName	Data store name	tag {A}
InitialValue	Initial value	vector {0}
Data Store Read (DataStoreRead)
DataStoreName	Data store name	tag {A}
SampleTime	Sample time	scalar (sample period) {-1} or vector [period offset]
Data Store Write (DataStoreWrite)
DataStoreName	Data store name	tag {A}
SampleTime	Sample time	scalar (sample period) {-1} or vector [period offset]
Demux (Demux)
Outputs	Number of outputs	scalar or vector {3}
From (From)
GotoTag	Goto tag	tag {A}
Goto (Goto)
GotoTag	Tag	tag {A}
TagVisibility	Tag visibility	{local} | scoped | global
Goto Tag Visibility (GotoTagVisibility)
GotoTag	Goto tag	tag {A}
Manual Switch (Manual Switch) (masked)
Merge
Multiport Switch (MultiPortSwitch)
Inputs	Number of inputs	scalar or vector {3}
Mux (Mux)
Inputs	Number of inputs	scalar or vector {3}
Switch (Switch)
Threshold	Threshold	scalar or vector {0}

Table 8-12: Sinks Library Block Parameters 

Block (Type)/Parameter	Dialog Box Prompt	Values
Display (Display)
Format	Format	{short} | long | short_e | long_e | bank
Decimation	Decimation	scalar {1}
Floating	Floating display	{off} on
SampleTime	Sample time	scalar (sample period) {-1} or vector [period offset]
Out (Outport)
Port	Port number	scalar {1}
OutputWhenDisabled	Output when disabled	{held} | reset
InitialOutput	Initial output	scalar or vector {0}
Scope (Scope)
Location	Position of Scope window on screen	vector {[left top right bottom]}
Open	(If Scope is open when the model is opened; cannot be set from dialog box)	{off} | on
NumInputPorts	Number of axes	positive integer > 0
TickLabels	Hide tick labels	{on} | off
ZoomMode	(Zoom button initially pressed)	{on} | xonly | yonly
AxesTitles	Title (on right-click axes)	scalar {auto}
Grid	(For future use)	{on} | off
TimeRange	Time range	scalar {auto}
YMin	Y min	scalar {-5}
YMax	Y max	scalar {5}
SaveToWorkspace	Save data to workspace	{off} | on
SaveName	Variable name	variable {ScopeData}
DataFormat	Format	{matrix | structure}
LimitMaxRows	Limit rows to last	{on} | off
MaxRows	(no label)	scalar {5000}
Decimation	(Value if Decimation is selected)	scalar {1}
SampleInput	(Toggles with Decimation)	{off} | on
SampleTime	(SampleInput value)	scalar (sample period) {0} or vector [period offset]
Stop Simulation (StopSimulation) (no block-specific parameters)
Terminator (Terminator) (no block-specific parameters)
To File (ToFile)
Filename	Filename	filename {untitled.mat}
MatrixName	Variable name	variable {ans}
Decimation	Decimation	scalar {1}
SampleTime	Sample time	scalar (sample period) {-1} or vector [period offset]
To Workspace (ToWorkspace)
VariableName	Variable name	variable {simout}
Buffer	Maximum number of rows	scalar {inf}
Decimation	Decimation	scalar {1}
SampleTime	Sample time	scalar (sample period) {-1} or vector [period offset]
XY Graph (XY scope.) (masked)

Table 8-13: Sources Library Block Parameters 

Block (Type)/Parameter	Dialog Box Prompt	Values
Band-Limited White Noise (Continuous White Noise) (masked)
Chirp Signal (chirp) (masked)
VectorParams1D	Interpret vector parameters as 1-D	off {on}
Clock (Clock) (no block-specific parameters)
Constant (Constant)
Value	Constant value	scalar or vector {1}
VectorParams1D	Interpret vector parameters as 1-D	off {on}
Digital Clock (DigitalClock)
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]
From File (FromFile)
FileName	Filename	filename {untitled.mat}
From Workspace (FromWorkspace)
VariableName	Matrix table	matrix {[T,U]}
Ground (Ground) (no block-specific parameters)
In (Inport)
Port	Port number	scalar {1}
PortWidth	Port width	scalar {-1}
SampleTime	Sample time	scalar (sample period) {-1} or vector [period offset]
Pulse Generator (Pulse Generator)
Amplitude	Amplitude	scalar {1}, vector, or matrix
PhaseDelay	Phase delay	scalar {0}, vector, or matrix
PulseType	Pulse type	{'Time based'} | 'Sample based'
PulseWidth	Pulse width	scalar {50}, vector, or matrix
SampleTime	Sample time	scalar (sample period) {1} or vector [period offset]
VectorParams1D	Interpret vector parameters as 1-D	off {on}
Ramp (Ramp) (masked)
VectorParams1D	Interpret vector parameters as 1-D	off {on}
Random Number (RandomNumber)
Seed	Initial seed	scalar or vector {0}
VectorParams1D	Interpret vector parameters as 1-D	off {on}
Repeating Sequence (Repeating table) (masked)
Signal Generator (SignalGenerator)
WaveForm	Wave form	{sine} | square | sawtooth | random
Amplitude	Amplitude	scalar or vector {1}
Frequency	Frequency	scalar or vector {1}
Units	Units	{Hertz} | rad/sec
VectorParams1D	Interpret vector parameters as 1-D	off {on}
Sine Wave (Sin)
Amplitude	Amplitude	scalar or vector {1}
Frequency	Frequency	scalar or vector {1}
Phase	Phase	scalar or vector {0}
SampleTime	Sample time	scalar (sample period) {-1} or vector [period offset]
VectorParams1D	Interpret vector parameters as 1-D	off {on}
Step (Step)
Time	Step time	scalar or vector {1}
Before	Initial value	scalar or vector {0}
After	Final value	scalar or vector {1}
VectorParams1D	Interpret vector parameters as 1-D	off {on}
Uniform Random Number (Uniform RandomNumber)
Minimum	Minimum	scalar or vector {-1}
Maximum	Maximum	scalar or vector {1}
Seed	Initial Seed	scalar or vector {0}
SampleTime	Sample Time	scalar or vector {0}
VectorParams1D	Interpret vector parameters as 1-D	off {on}

Table 8-14: User-Defined Functions Block Parameters 

Block (Type)/Parameter	Dialog Box Prompt	Values
Fcn (Fcn)
Expr	Expression	expression    {sin(u(1)*exp(2.3*(-u(2))))}
MATLAB Fcn (MATLABFcn)
MATLABFcn	MATLAB function	MATLAB function {sin}
OutputWidth	Output width	scalar or vector {-1}
S-Function (S-Function)
FunctionName	S-function name	name {system}
Parameters	S-function parameters	Additional parameters if needed

Common Block Parameters

Mask Parameters