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Enabled Gate

Allow entity arrivals upon positive control signal

Library

Gates

Description

This block represents a gate that is open whenever the control signal at the en input port is positive, and closed whenever the signal is zero or negative. By definition, an open gate permits entity arrivals as long as the entities would be able to advance immediately to the next block, while a closed gate forbids entity arrivals. The en signal is a numerical signal of type double. Because the signal can remain positive for a time interval of arbitrary length, an enabled gate can remain open for a time interval of arbitrary length. The length can be zero or a positive number.

Ports

Entity Input Ports

LabelDescription
INPort for arriving entities.

Signal Input Ports

LabelDescription
enThe gate is open whenever this signal is positive. This signal must be an event-based signal.

Entity Output Ports

LabelDescription
OUTPort for departing entities.

Signal Output Ports

LabelDescriptionTime of Update When Statistic Is On
#dNumber of entities that have departed from this block since the start of the simulation.After entity departure

The initial output value is 0. This value is in effect from the start of the simulation until the first update by the block.

Dialog Box

Enabled Gate Tab

Resolve simultaneous signal updates according to event priority

Select this option to prioritize the gate-opening or gate-closing event explicitly, relative to other simultaneous events in the simulation. If you do not select this option, the event has priority SYS1 on the event calendar. For details, see Resolve Simultaneous Signal Updates.

Event priority

The priority of the gate-opening and gate-closing events, relative to other simultaneous events in the simulation. Gate opening and closing are distinct events that share the same event priority. For details, see Specify Event Priorities to Resolve Simultaneous Signal Updates. You see this field only if you select Resolve simultaneous signal updates according to event priority.

Statistics Tab

These parameters determine whether the block produces data at signal output ports or omits those ports. For descriptions of the data and ports, see the preceding table, "Signal Output Ports".

Number of entities departed

Allows you to use the signal output port labeled #d.

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