Wait for Input

Description

The Wait for Input task () requires that one or more conditions to be met before starting the next task in the protocol. For example, you can require that the system environment reach a certain temperature and humidity before the Main Protocol starts.

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 Wait for Input task at the desired point in the protocol, set the following parameters in the Task Parameters area:

 

 

Parameter	Description
Input name	The name of the condition you want to check. Select from the list of condition names. You can select either a digital input or an analog input condition. The names are set up in the I/O device diagnostics.
On/Off	The new state of the item. This parameter appears only if you select a digital input condition.
Wait for	The condition to be met: • Exactly • A range • At least • At most This parameter appears only if you select an analog input condition.
Min or exact value	The minimum value or the exact value of the condition. Examples: • If you want to specify an exact value of 50, you can type 50 in this field. • If you want to specify a minimum (at least) value of 100, type 100 in this field. • If you want to specify a range such as 90 to 100, type 90 in this field, and then type 100 in the Max value field. This parameter appears only if you select an analog input condition.
Max value	The maximum value of the condition. Examples: • If you want to specify a maximum (at most) value of 110, type 110 in this field. • If you want to specify a range such as 90 to 100, type 90 in the Min or exact value field, and then type 100 in this field. This parameter appears only if you select an analog input condition.
Timeout (s)	The length of time, in seconds, the software should wait for the condition to be met before taking the action you specify in the On timeout field. Note: 0 means wait indefinitely.

Example

Goal

The humidity within the system chamber must be at least 65% RH before the protocol run can start. The humidity should not exceed 75% RH. The software will wait indefinitely for the condition to be satisfied.

Implementation

Configure the Automation Control Unit to include a humidity signal channel (in this example, an analog input channel). Add a Wait for Input task in the Startup Protocol or at the beginning of the Main Protocol.

 

The task parameters for the Wait for Input task are:

 

Related information

 

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