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Chapter 3
Example Applications
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National Instruments Corporation
3-17
Figure 3-6. PID Alarm Connection Dialog Box
5.
Download the configuration. The PID now detects a high limit alarm
whenever the temperature exceeds 40° C, and the alarm is transmitted
to the interface on your PC. You need a separate program (such as the
Lookout HMI package from National Instruments) to receive, display,
and acknowledge the alarms. You can verify that the alarms are being
detected by the PID block by reading the
whenever the temperature exceeds 40° C, and the alarm is transmitted
to the interface on your PC. You need a separate program (such as the
Lookout HMI package from National Instruments) to receive, display,
and acknowledge the alarms. You can verify that the alarms are being
detected by the PID block by reading the
HI_ALM
parameter. The
Alarm State changes, and the Alarm Timestamp is set when the alarm
goes active.
goes active.