Cisco 2620 Configuration Manual page 102

Chapter 3 Configuring with the Command-Line Interface
Configuring the NM-AIC-64, Contact Closure Network Module
define the range of possible values. (Valid values are from –9999999.9 to 9999999.9.) For
voltage-monitoring alarms, the range of possible values is always –60V to 60V. The other four values
must be within the defined range, and they partition the range into low-low, low, high, and high-high
ranges. Except for the normal range, each range is associated with an alarm condition.
Analog points have four unique alarm states. Each alarm state has its own alarm description string. Only
one alarm state per point may be active at any given time. In other words, when a threshold is crossed,
the previous alarm state is cleared and the new alarm state is active.
When an analog input is configured as discrete, the user must select whether the point is monitoring
voltage or current. Similar to the analog configuration, the user must also select the range of acceptable
values for a current-monitoring alarm. (Valid values are from –9999999.9 to 9999999.9.) The voltage
range is always –60V to 60V. The user must define the threshold that will cause the alarm condition and
whether the normal state of the alarm is the higher or lower range.
Note
For the current analog point, the lower boundary is 4 mA and the upper boundary is 20 mA. For example,
analog current-loop 10 13 16 17 20 26
has 16 units between 10 and 26. If the AIC measures 4 mA, then it will factor that the point is registering
at the lower boundary. The AIC will interpret 13 as 7 mA, 16 as 10 mA, 17 as 11 mA, 20 as 14 mA, and
26 as the upper boundary, which is 20 mA.
Following are examples:
Point 57 is monitoring the ambient temperature of a building and the sensor range is –20 to 75 degrees
Celsius. Below 0 degrees is a critical alarm, 0 to 10 degrees is a major alarm, 10 to 35 degrees is the
normal range, 35 to 45 degrees is a minor alarm, and above 45 degrees is a major alarm. The
configuration for this point follows:
alarm 57
analog current-loop –20 0 10 35 45 75
level low-low 1
level low 2
level high 3
level high-high 2
Point 58 is monitoring a fuel tank level with a resistive sensor. Below –46 volts is a critical alarm,
–46 to –40 volts is a minor alarm, and above –40 volts is the normal range. This is a unidirectional alarm,
so the high thresholds are set equal to the high bound (since this threshold cannot be crossed). The
configuration for this point follows:
alarm 58
analog voltage –46 –40 60 60
level low-low 1
level low 3
Point 59 is monitoring a battery bank. Below –42 volts is a critical alarm and above –42 volts is the
normal range. The configuration for this point follows:
alarm 59
discrete voltage –42 high
level 1
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
3-42
OL-1957-04