Appendix A
HMI Function Reference
©
National Instruments Corporation
A-5
Acknowledge Alarm
Use the Acknowledge Alarm VI to acknowledge alarms on a tag or a group. Call this VI when
an Acknowledge button is pressed in your HMI. You can call this VI multiple times from
your HMI.
group/tag names is the list of tags that have alarms to be acknowledged.
ack alarm(T) determines whether alarms on tags in group/tag names is
acknowledged. If FALSE, this VI does nothing except return the shutdown
status. If unwired, this input is TRUE by default. You can wire this input in
your diagram so that acknowledge is called only when a front panel control
is TRUE. This eliminates the need to place a case structure in your calling
diagram.
error indicates that an error occurred when executing the Acknowledge
Alarm VI. This is probably a result of the tag or group name not being
found.
shutdown indicates that the BridgeVIEW Engine is shutting down. In this
case, the Acknowledge Alarm VI returns immediately with shutdown
TRUE. You can use shutdown to exit any loop that uses the Acknowledge
Alarm VI.
