Barnett Engineering ARU CV2 How are alarms processed?, Inputs Hardware Inputs, Group, Directory A

Operations Overview 1-2

Analog inputs convert the voltage level to a digital value and perform a comparison against the programmed low and high setpoints. An alarm is present when the measured value is above or below the setpoint. Alarm messages are spoken using the stored phrase with either “High” or Low” appended depending on which setpoint has been exceeded. The actual reading, including decimal place notation and engineering units, is spoken when the Cv2 is interrogated.

The latching alarm function is also available for analog inputs.

1.3 How are alarms processed?

The way in which the Cv2 processes alarms is shown in Figure 1.

8

INPUTS

HARDWARE

INPUTS

8

OUTPUTS

HARDWARE OUTPUTS

POINTS

UP TO 30 INPUTS OR OUTPUTS

GROUP

1

GROUP

6

DIRECTORY

A

DIRECTORY

F

DIALOUT

COMMANDS

CONTROL

COMMANDS

TELEPHONE

PORT

Figure 1 Cv2 Block Diagram

B1272M001 BARNETT ENGINEERING LTD. ProTalk Cv2