XL15C Digital Outputs

Description

The XL15C has 8 Digital Outputs.

Digital Outputs are often used to control lighting, fans, and HVAC equipment.

Each Digital output may be configured as Digital, PWM or Float. Digital outputs configured as Digital can drive an digital load and one configured as PWM or Float can drive an analog load.

Purpose

Configure a Digital output to match the output device and the control algorithm.

Mode

Off-line or On-line.

Procedure

  1. Expand the XL15C folder in the bottom-left file explorer palette.
  2. Drag the DigitalOut item onto the wiresheet on the right side of the screen.
  3. Right-click the box and select Config to display the DigitalOut dialog.
  4. Select the desired analog output from the Output Kind field.
  5. If output kind is Float Open /Float Close enter a value in the speed in the Speed field (default value is 90 sec) & select the Position Startup Synchronization. These fields are enabled only when input kind is Float Open/Close. Select the Output State.
  6. If the Output kind is PWM or Digital select the Output State.
  7. If the output kind is PWM enter the values for PWM settings (Period, 0% & 100%).
  8. Click OK to save the settings or Cancel to revert to the last saved settings.

Fields

Name Definition
Output Kind The output kind must be one of the following types for a digital output:
  • Unconfigured
  • Digital
  • PWM
  • Float1Close
  • Float2Close
  • Float1Open
  • Float2Open

At the most 4 digital outputs can be configured as 2 float pairs. If a digital output is configured as Float Open then another digital input must be configured as Float Close.
Engineering Units  
Speed The Speed field is enabled only when the output kind is either Float1Open or Float2Open. Speed has a range of 10 sec to 1000 sec. Default speed is 90 sec. Float1Close or Float2Close have the same speed specified for the corresponding Float1Open or Float2Open.
Position Startup Synchronization This field is enabled only when a digital output is configured Float1Open or Float2Open.

The options are:

  • Sync Closed
  • Sync Open
  • Sync None
  • Invalid

The default selection is Sync Closed.

The Position Start-up Synchronization for an output of kind Float1Close or Float2Close is the same as the selection for the corresponding Float1Open or Float2Open.
Float Settings All values may be entered with a 0.1 second resolution

Period

The duration of a single cycle defined as from the start of one pulse to the start of the next pulse. Must be greater than or equal to the maximum pulse width. Default value is 6553.5 Sec

0%

The duration in seconds for the pulse width of a single pulse at 0% output from the control loop. This value must be less than the value entered for 100% Default value is 0.1 Sec.

100%

The duration in seconds for the pulse width of a single pulse at 100% output from the control loop. This value must be greater than the value of 0% and less than or equal to the Period value. Default value is 6553.5 Sec.

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