Sine Systems RFC-1/B User Manual

RFC-1 Advanced Operation page 6.27
6.6.3 Trigger Rules
The trigger rule determines the conditions under which the alarm activates—which alarm limits are critical. The
default trigger rule is adequate in most cases as long as the alarm limits are set properly. Program the value from the
column V1 into the third memory location for the selected alarm.
It is a common mistake to program alarm limits incorrectly when leading zero suppression is enabled. The best
method is to take a reading of the channel that the alarm will monitor and write down the numbers. If the telemetry
value is not 4 digits long, add zeros to the left of the value until it is 4 digits long. Set the alarm limits using the 4-digit
number. See section 6.3.7 for more information.
V1
Trigger Condition—trigger the alarm when…
1
The telemetry varies more than 2.5% from the reference reading
2
The telemetry varies more than 5.0% from the reference reading
3
The telemetry varies more than 10% from the reference reading
4
The telemetry varies more than 20% from the reference reading
5*
The telemetry crosses either limit—but only if it was within limits at the time of the reference scan
6
The telemetry exceeds the upper limit—but only if it was within limits at the time of the reference scan
7
The telemetry falls below the lower limit—but only if it was within limits at the time of the reference scan
8
The telemetry crosses either limit—unconditionally
9
The telemetry exceeds the upper limit—unconditionally
10
The telemetry falls below the lower limit—unconditionally
* This is the default setting.
Trigger rules 1-4, the percentage change rules, are useful for transmitters operating at multiple power levels. Using
the percentage change rules allows a single alarm to monitor the transmitter at all power levels. The reference
reading is taken automatically when the transmitter power level is changed by the RFC-1, either manually or
automated with date/time triggers. The upper and lower limits are ignored when these trigger rules are used. For
convenience they can be set to 9999 and 0000 respectively.
Trigger rules 5 through 7 are appropriate for most cases. In fact, trigger rule 5 can be used in place of 6 and 7 most
of the time by programming the alarm limits properly. The important distinction for trigger rules 5-7 is that the RFC-1
can be used to adjust a piece of equipment to an out of tolerance condition without generating an alarm. If this was
not the case, consider what happens when a transmitter must run at abnormally low power for maintenance or turning
the transmitter off.
Trigger rules 8-10 should be used with caution. They seem harmless from their short descriptions but they make the
RFC-1 alarms very persistent. These rules trigger as long as the monitored device is out of tolerance—they do not
stop calling after contacting an operator. If the situation is left uncorrected, they will trigger repeatedly until the
condition is rectified. Consider this carefully before using them.
6.6.4 Action Sequence
This value specifies which action sequence executes when the alarm triggers. Valid action sequences numbers are
from 1 to 12. Action sequences 1-8 are programmable. Action sequences 9-12 are fixed. Action sequence 9 is
usually a safe choice if you are not sure which action sequence to use.
The selected action sequence must be programmed to perform the appropriate task. If the selected action sequence
has no instructions or if an invalid sequence number is used, the system will substitute action sequence 9.
Review section 6.5 for more information on action sequences. Program the number of the action sequence to
execute at the fourth memory address for the selected alarm.

Sine Systems RFC-1/B Specifications

General

Brand	Sine Systems
Model	RFC-1/B
Category	Remote Control
Language	English