MODEL 2310 AL MCS-11 REMOTE ENCODER
18 FC2310_AL-20040506
FIAL
INCORPORATED
displayed unless an RDS scanner is chosen.
TRIP SUMMARY RELAY:
Check this box if you want the summary relay to close whenever there
is an alarm present on one or more of the inputs. The contacts of this relay can be used to operate
a local alarm indicator, or to assert an RSS summary bit in an existing RSS at the site.
ALARM VS STATUS CHECKBOXES:
The default is for these checkboxes to be blank, which
means that the corresponding input is an alarm point. Points in alarm cause the designated RSS
summary bit to be set when they are asserted at the input connector. They also cause the alarm
event to be latched into the RSS or RDS scanner until is it 'seen' (polled) by the MCS-11 master.
If a box is checked, then the corresponding input is a status point. Status points do not cause the
summary bit to be set when they are asserted at the input connector. Status points are not
latched, and may be 'missed' by the
MCS-11 master if it polls at the instant that the status point is
unasserted. In
Figure 11
, point #1 is designated as a status point. All the others are alarm points.
GROUND INPUT TO ASSERT:
Each point can have its input set for normal operation (ground the
input to assert it) or inverted operation (disconnect from ground to assert the point). Click on the
Ground Input To Assert buttons to toggle their states. For example, in
Figure 11
only point #2 is set
for inverted input. This means that point #2 is normally connected to ground for an unasserted
condition and asserted (in alarm), when disconnected from ground. The other points in this
scanner are asserted whenever they are connected to ground.
ALARM DELAY TIME:
Each point can have a delay time set, which prevents the input event from
being reported to the Master unless the input is asserted continuously for longer than the delay
time. This is useful for alarms that are not critical if they are ON for a short period of time (such as
a fan), but are serious if they remain ON.
The delay value for each point may be set with one second resolution up to 18 hours. In
Figure 11
,
point 3 has a delay setting of 2 minutes and 15 seconds. Therefore, an input for point number 3
must be asserted continuously for 2 minutes and 15 seconds before the point will be set in the
RDS scanner and reported to the Master. The event will not be reported at all if the point is only
asserted for a period less than 2 minutes and 15 seconds.
