Barnett Engineering ARU CV2 Analog Input, On/Off Output, Timed Output, Points section, B1272M001

Configuration using the PC 3-5

Analog Input

Setting the input port type to Analog allows measurement of voltages between 0 and

+5 volts. As with the other input types, the definition of an analog input is completed in the Points section where the range, setpoints and units are assigned.

An Analog port can be changed to one of the other input types by selecting from the Change Input Port drop-down list. Changing input type will force any variables used in the Hardware section to the default value and will remove any points that make use of this input.

On/Off Output

On/Off outputs operate with two DTMF codes that are set in the Points section. One code turns the output On and the other returns it to the Off state. The output will remain in the last commanded state indefinitely.

To make an On/Off port operational for remote control or as one of the special functions -- Alarm Active or New Alarm -- it must be configured and enabled in the Points section.

Timed Output

Timed outputs are activated by receipt of a single DTMF ‘On’ code. This code is set in the Points section. When the code is received, the output will activate and will remain in that state until the timer expires or the DTMF ‘Off’ code is received.

Two timer ranges, seconds and minutes, are available. The seconds range has a maximum value of 1638 seconds (27 minutes) with a resolution of 25 msec. For longer times the minutes range should be used. When set to minutes, the timer has a maximum value of 65,535 minutes with a resolution of one minute. For short times use the seconds timer to avoid the inaccuracy introduced by the one minute resolution.

When the command to turn on the Timed output has been received and executed, the Cv2 will announce the current state of the output port. If the timer value is set to a short interval, it is possible that the output will have returned to the Off state by the time the status is announced.

To make a Timed port operational for remote control or as one of the special functions -- Alarm Active, New Alarm or Acknowledge Received - it must be configured and enabled in the Points section.

3.5.2 Points section

After the Hardware ports are configured, use the Points section to specify how activities on these ports are processed. There are 30 points available for use as either input or output controls. It is in the Points section that inputs are given the ability to generate alarms and outputs are enabled to perform remote control functions. Each point can be referenced to any of the input or output ports. When a port is selected in Points it will have the characteristics that were set in the Hardware section. If a different type of operation is required for a port, it must be changed in the Hardware section.

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