Page 80 VRC2000 Installation and Operations Manual
Technical or Setup Assistance
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Once the cause of an alarm is determined, the problem can be corrected by
issuing commands to the appropriate command channels.
To clear all alarms stored in the VRC2000 by entering
☎ “0 1 0”
This clears all alarms. Be careful with this command, since alarms cannot
be recalled once they have been cleared.
If a “*” is entered during alarm reporting, the VRC2000 will stop reporting
alarms, return to normal operation and wait for a command.
Status-Channel Alarms
Status-channel alarms are generated when the sample changes its state (i.e. a
status channel sample goes low or high). For example, if an alarm is
generated and cleared, a new alarm will not be generated until the status
channel goes high and then goes low again, even though the status channel’s
sample remains in the low condition. The alarm is generated by the
transition between the high and low states.
Metering-Channel Alarms
Metering-channel alarms are generated the same way as status-channel
alarms. The first high limit for a metering channel could be set to generate
an alarm. If an alarm is generated and cleared, a new alarm will not be
generated until the metering-channels sample returns to the metering
channel’s nominal range and then rises to above the first high limit. Once
again, the alarm is generated by the transition over the tolerance limit.
Checking Current Date and Time
To check the VRC2000’s real-time clock, enter
☎ “0 6 0”
The unit will respond with the current date and time.
Using Sequence Output Programs
To use the first sequence-output program, enter the following code:
☎ “5 0 1 #”
Your VRC2000 will respond:
• SEQUENCE ONE ENABLED
The VRC2000 will continue with all information configured into the
sequence-output program. There are four sequence-output programs
available on the VRC2000. To access them, use the codes in Table 14 (next
page, top).
Operation
Continued
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