Simplex InfoAlarm 4100ES, Руководство оператора

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6-6
Forcing Points On and Off
Overview
Forcing control points ON and OFF allows a precise degree of manual system control. For
example, you can force a relay or signal point ON to test or execute its function. Unlike
ENABLE/DISABLE (see description in previous section), a point that you force OFF does not
refresh its state when the point is turned back ON.
Example: Suppose you turn a signal point OFF, and during the time the point is disabled, a
custom control equation executes that turns the point ON. When the point is
subsequently returned to automatic operation, the point's state does not update and the
custom control equation turning the point ON does not execute.
Forcing Points ON or
OFF Follow these steps to force a point ON or OFF.
1. Select the point. Refer to Chapter 5 for information on selecting points.
2. Press the “Select Item” softkey or press ENTER to access the point.
3. Scroll down to show the various softkey operations.
4. Press either the “On” or “Off” softkey.
The system indicates that the command has been accepted and generates a "Manual Override Trou-
ble" for the point to remind you that the point has been forced ON or OFF.
Returning a Point to
Automatic Operation Automatic operation is the normal operation of the point. For example, if the point is a signal
point, a setting of AUTOMATIC indicates that the signal is under the control of the job executing
on the panel.
To return the state of a point that is currently ON or OFF to AUTOMATIC, follow these steps.
1. Select the point. Refer to Chapter 5 for information on selecting points.
2. Press the “Select Item” softkey or press ENTER to access the point.
3. Scroll down to show the various softkey operations.
4. Press the “Automatic” softkey.
The system clears the "Manual Override Trouble."
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