IC (Simulink Reference)

Set the initial value of a signal

Library

Signal Attributes

Description

The IC block sets the value of the signal at its output port at t=0.

The IC block is also useful for providing an initial guess for the algebraic state variables in the loop. For more information, see Algebraic Loops in the Using Simulink documentation.

Data Type Support

The IC block accepts and outputs a signal of type double.

Parameters and Dialog Box

Initial value: Specify the initial value for the input signal.
Sample time (-1 for inherited): Specify the time interval between samples. To inherit the sample time, set this parameter to -1. See Specifying Sample Time in the online documentation for more information.

Examples

These blocks illustrate how the IC block initializes a signal labeled "test signal."

At t = 0, the signal value is 3. Afterwards, the signal value is 6.

Characteristics

Direct Feedthrough
Yes

Sample Time
Specified in the Sample time parameter

Scalar Expansion
Yes, of parameter only

Dimensionalized
Yes

Zero Crossing
No

Direct Feedthrough	Yes
Sample Time	Specified in the Sample time parameter
Scalar Expansion	Yes, of parameter only
Dimensionalized	Yes
Zero Crossing	No

Hit Crossing If