Chapter 6—Alarms 63230-300-212
Custom Alarms April 2001
©20 01 Schneider Electric All Rights Reser ved
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The circuitmonitor has many pre-defined alarms, but you can also set up
yourown custom alarms. For example, youmay need to alarm on the ON-to-
OFF transitionof a digitalinput. To create this type of custom alarm:
1. Select the approp riate alarm grou p (digital in this cas e).
2. Select the type of alarm (described in Table 6–4 on page 96).
3. Give the alarm a nam e.
After creatinga custom alarm, you can configure it by applying priorities,
settingpickups and dropouts (if applicable), andso forth. For instructions on
creatingcustom alarms, see “Cr eating a New Custom Al arm”on page 19
in Chapter 3—Operation.

NOTE:The circuit monitor will automatically createalarms for the IOC44 and

the IOXwhen the modules are identified. These are OFF-to-ON alarms.

A circuitmonitor can mimic the functions of certain motor management
devicesto detect and respond to conditions such as phase loss,
undervoltage,or reverse phase relays. While the circuitmonitor is not a
primary protectivedevice, it can detect abnormal conditionsand respond by
operatingone or more Form-C output contacts. These outputs can be used
to operatean alar mhor n or bell to annunciatethe alarm condition.

NOTE:The circuit monitor is not designed for use as a primary protective

relay.While its setpoint-controlled functionsmay be acceptable for certain

applications,it should not be considered a substitute for proper circuit

protection.

If you determinethat the circuit monitor’s performance is acceptablefor the
application,the output contacts can be used to mimic some functions of a
motormanagement device.W hen decidingif the circuit monitor is acceptable
for theseapplications, keep the following points inmi nd:
•Circuit monitorsrequire control power to operate properly.
•Circuit monitorsmay take up to 5 seconds after control power is applied
beforesetpoint-controlled functions are activated. Ifthis is too long, a
reliablesource of control power is required.
•When control poweris interrupted for more than approximately 100
milliseconds,the circuit monitor releases all energizedoutput contacts.
•Standard setpoint-controlledfunctions may take1–2 seconds to operate,
in addition to theintended delay.
•Apassword is required to program the circuit monitor’ssetpoint controlled
relay functions.
•Changingcertain setup parameters after installationmay operate relays in
a manner inconsistentwith the requirements of the application.
Forinstructions on configuring setpoint-controlled alarms or relaysfrom the
circuitmonitor’s display,see “Setting Up and Ed iting Alarms”on page 21. The
types of availablealarms are described later in this chapter in
Tab l e 6–3 on page 94.
CUSTOM ALARMSSETPOINT-CONTROLLEDRELAY FUNCTIONS