Operations Overview 2-1B1272M001 BARNETT ENGINEERING LTD. ProTalk Cv22. Operations OverviewThe purpose of this chapter is to provide an overview of the Cv2 capabilities. Chapter topics areorganized in the same order that you would follow in setting up the system.For more details on configuring the operation through the programming software, refer toChapter 3, Configuration.2.1 Cv2 Capabilities (Advanced mode)When an alarm occurs, the Cv2 places a call using its built-in cellular phone and announcesthe alarm condition using stored voice messages. Alarm messages consist of the site IDphrase, the group phrase and the alarm message phrase that are stored at voice programmingtime. The group phrase is used if the alarms have been grouped to provide different activitiesfor different alarm conditions. The unit can also be called up and interrogated to obtaincurrent alarm conditions and readings.The Cv2 has eight hardware inputs that can be programmed to accept either digital or analogsignals and eight hardware outputs. Inputs can be independently configured to operate inthese modes:digital monitoring contact closures or voltage levelswatchdog monitoring for the absence of a periodic eventtotalizer counting eventsinterval measuring the time duration of eventsanalog measuring 0 to 5 volt signalsOutputs can be set to operate as either on/off controls or as timed controls.2.1.2 What constitutes an alarm?Alarm conditions can be defined for digital, watchdog and analog inputs. Totalizers andinterval inputs are used for measurement purposes and do not generate alarms. The signal atthe input is conditioned by a debounce timer that ensures the level is valid before accepting it.A digital input has normal and alarm states that can be defined as either when the input is highor low. After the input signal has been qualified by the debounce timer, it can be registered asan alarm when the input is active, or it can be latched to detect a pulsed condition. The voicemessage for a digital input is programmed to announce the alarm condition that it ismonitoring, e.g. “Intrusion Alarm”.Watchdog inputs use a timer that is restarted by changes at the input. If this timer expiresbecause it has not been restarted within the programmed interval, an alarm will register. Likethe digital input, the watchdog can be set as either an active-only or latched alarm. The voicemessage for a watchdog is similar to a digital, e.g. “Tower Strobe Failure”.Analog inputs convert the voltage level to a digital value and perform a comparison againstthe programmed low and high setpoints. An alarm is present when the measured value isabove or below the setpoint. Alarm messages are spoken using the stored phrase with either