VRC2000 Installation and Operations Manual Page 27
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Alarm Storage
The most recent 32 alarms are stored by the VRC2000 until they are cleared.
If more than 32 alarms are activated, only the most recent 32 alarms are
saved in the unit.
Reporting Alarms
The VRC2000 can be programmed to call when an alarm is activated and
report the alarm condition; or the unit can also be programmed to
automatically issue a command to change the site equipment’s operating
parameter(s) when an alarm is activated. The VRC2000 can also be
programmed to perform both tasks, or to take no action at all.
Status Channels
The VRC2000 has 16 status channels; the VRC2000 can be programmed to
activate an alarm when any one of the status channels changes its state. For
more information, see Setting Up Status Channels (below).
Metering Channels
The VRC2000 has 16 metering channels. For each metering channel, alarms
can be programmed for any of the four tolerance limits (two limits above
nominal operating condition, two limits below nominal operating condition).
For more information, see Metering Channels (Page 36).
Programming VRC2000 Alarm Delays and Channels
When programming the VRC2000, there are several constants, be it
programming an alarm delay, a status channel, command channel or
metering channel. One of utmost importance is that you use two digits when
referring to channels (command, metering or status).
Alarm Delay Examples
“0 9” would program this status channel’s alarm delay for nine seconds
“5 6” would sets this metering channel’s alarm delay for 56 seconds
Channel Examples
“0 6” will associate command channel 6 with a status channel
“0 3” will assign command channel 3 to a status-channel parameter
“1 4” would program command channel 14 as the default command channel
for the selected metering channel
“1 1” would program command channel 11 as the automatic command
channel for the metering channel’s second low tolerance limit
Setting Up Status Channels
The VRC2000 has 16 status channels, each of which can either be high
(open state) or low (closed state). The VRC2000 can be programmed to
provide specified information when a status channel is queried. Any status
channel can be set to set off an alarm (see Alarms, previous page).
Status channels allow monitoring of site parameters that have only two
states, such as checking if the exterior building lights are on or off. If the
lights are supposed to be on, but they are malfunctioning, the VRC2000 can
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