Digital Output

Description

The Digital Output task () changes the state of a digital signal. For example, you can use the task to turn on, turn off, open, or close the following:

•

Alarm

•	Waste bin door

You can also specify the length of time to leave the digital signal in the new state.

The digital signals you can turn on or off are configured in the IO Manager and ACU Diagnostics. For details, see Managing digital signals and the Automation Control Unit User Guide.

 

Task is available for...	Task is available in...
Automation Control Unit ()	Startup Protocol Main Protocol Cleanup Protocol

Task parameters

After adding the Digital Output task at the desired point in the protocol, set the following parameters in the Task Parameters area:

 

 

Parameter	Description
Digital output name	The name of the item whose state you want to change. Select from the list of names. The names are set up in the I/O device diagnostics.
On/Off	The new state of the item. Select On or Off. When you select On, the task icon changes to Set Digital Output. When you select Off, the task icon changes to Clear Digital Output.
Wait for time	The option to turn on or turn off the selected item and wait the specified duration before advancing to the next task. If you select the option, make sure you add another Digital Output task to reverse the state of the item at the desired point in the protocol. You must also select this option in the second task. If you do not select the option, the task will turn on or off the selected item, and then advance to the next task while the item is in the new state. If you specified duration, the item will reverse to its previous state after the duration ends.
Duration of On/Off (s)	The length of time, in seconds, the item should remain in the new state. For example, if you want to leave the UV lamp on for 15 seconds, type 15. At the end of the specified duration, the item reverses to its previous state. If you specify a duration, you do not need to add a second Digital Output task to reverse the state. If Wait for time is selected, this is the length of time, in seconds, the task waits before advancing to the next task.

Example 1: Turn on a ventilation fan while reagent is dispensed

Goal

The ventilation fan must be on while a particular reagent is being dispensed on the Bravo Platform.

Implementation

Add a Digital Output task before and after the Bravo Subprocess task that contains the dispensing subroutine. The first Digital Output task (Set digital output) turns on the fan. The second Digital Output task (Clear digital output) turns off the fan.

 

The task parameters for the digital output tasks are:

 

Example 2: Turn on a ventilation fan for 15 seconds

Goal

The ventilation fan must be on for 15 seconds while a particular reagent is being dispensed on the Bravo Platform.

Implementation

Add a Digital Output task before the Bravo Subprocess task that contains the dispensing subroutine. The Digital Output task (Set digital output) turns on the fan for 15 seconds. A second Digital Output task (Clear digital output) is not necessary.

 

The task parameters for the Digital Output task are:

 

Related information

 

For information about...	See...
Adding devices	Adding devices
Adding tasks in a protocol	Adding and deleting tasks
Wait for Input task	Wait for Input
Assigning signals to lights, alarms, pass-through gates, and sensors	Managing digital signals
Automation Control Unit	Automation Control Unit User Guide