如何
Forcing a Value
You force a value when you want to override a value, such as a value from a device.
When you force a value, you override all input from the system. For example, if a schedule is set to enable a device at 09:00, but you want to enable it at 08:00, you can force the enablement at 08:00.
You can manually release a forced value at any time or you can automate the release, using a Timed Force utility object to specify the duration or end time of the force. 有关更多信息，请参阅 Timed Force Objects .
When you release a forced value, the value returns to its normal status.
In WorkStation, you can view the unforced value, which is the real value from the system, at any time. 有关更多信息，请参阅 Viewing an Unforced Value .
You can set a timeout on forced values so that the forced value is automatically unforced after a fixed time. The time can be a duration, for example two hours. The forced value can also be unforced at a specific calendar date and time.
有关更多信息，请参阅 Setting a Timeout on a Forced Value .
有关更多信息，请参阅 Setting a Timeout on a Forced Value WebStation .
A forced value is indicated by orange color in the properties dialog boxes. In in the Watch pane, a forced value is indicated by a pointing hand
In the List View and Search View, a forced value is indicated by the text [Forced] in the 'Value' column.
In WorkStation, you can view the unforced value, which is the real value from the system, at any time. 有关更多信息，请参阅 Viewing an Unforced Value .
A forced value is indicated by orange color and a pointing hand in the List view.
A forced value is indicated by orange color in Function Block Graphics Viewer. 有关更多信息，请参阅 Forced Value Indication in Function Block Graphics Viewer .
You can search for forced values using the search function in WorkStation.
有关更多信息，请参阅 Searching for Forced Values .
You can search for forced values in WebStation using Diagnostics.
有关更多信息，请参阅 Displaying a List of Forced Values in WebStation .
In WebStation, click the value you want to force.
In the value row, click Force .
Click Save .
Forced Values
Releasing a Forced Value
Setting a Timeout on a Forced Value WebStation