User guide

4-8 Heater Control for Windows
Figure 4-7
The Alarm dialog box shown in Figure 4-7 is used to setup the process alarms. The alarms
can be set for each loop. The alarms identify and notify the user of changes and deviations
from the temperature Set Point.
Process alarms can be set to notify the operator and/or control the output in the event of
deviations from the Set Point. Figure 4-8 shows the activation and deactivation points. There
are four alarm types: High Process, Low Process, High Deviation and Low Deviation. These
points are shown in Figure 4-7.
For each type of alarm, you assign an Output number, then select how the alarm should be
handled, or choose Off, for no alarm. If Alarm is chosen, you will get an alarm notice. In
FMW, this notice is not readily visible, so it is recommended that you select Control. If you
select the Control setting, the output of the loop will be adjusted to the Set Point if the alarm is
activated. Setting this Set Point to zero ensures that the heater will shut off in cases of over-
heating. This is the recommended setting.
For Low/High Deviation alarms, set the number of deviations that you will allow the Set Point
to exceed before the alarm is activated and the output controlled.
• To return to the Heater Loop window, click on the window control button in the upper
left corner of the window (Win 3.x) and choose Close.
• To exit Heater Control, click on the Exit button.