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HGM Alarm Acknowledge Options
Two alarm acknowledge options are supported—Auto Acknowledge and Network
Acknowledge.
In the Auto Acknowledge mode, the HGM will clear its alarm outputs the next time the
alarmed zone is sampled and its PPM has dropped below the alarm thresholds. No
intervention from the LonWorks network is necessary.
In the Network Acknowledge mode, the HGM will never clear its alarm outputs until
LonWorks has acknowledged the alarms using network variables nviHgmAlmAck or
nviHgmAlmAckSw (discussed below). Once LonWorks has acknowledged the alarms,
the HGM will clear its alarm outputs the next time the alarmed zone is sampled and its
PPM has dropped below the alarm thresholds.
Dipswitch A1 on the adapter selects which alarm acknowledge option is used:
A1 On = Auto Acknowledge
A1 Off = Network Acknowledge
If dipswitch A1 is changed while the adapter is powered up, the adapter must be reset by
pressing the CPU RST button below dipswitch A before the change will take effect.