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Configuration using the PC 4-5
B1272M001 BARNETT ENGINEERING LTD. ProTalk Cv2
Watchdog Interval timer. Refer to the preceding Digital input description for details on the
Debounce timer. Two Watchdog time 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 Watchdog times the minutes range should be used. When set to
minutes, the Watchdog timer has a maximum value of 65,535 minutes with a resolution of
one minute. For short Watchdog times, use the seconds timer to avoid the inaccuracy
introduced by the one minute resolution. When setting the two timers, take into
consideration the relationship between the two. The Debounce time can not be greater than
the Watchdog Interval; otherwise a constant alarm condition will occur.
Default Watchdog time: 10 min
Interval Input
Interval timers measure the time interval that an input is active, either how long it is high or
how long it is low. The input is conditioned by the Debounce timer which is described in
the Digital input section. When setting the Debounce timer, consider the anticipated
duration of the interval. Since the Cv2 registers a change only after the Debounce time,
long debounce settings will affect the accuracy of the measurement.
Totalizer Input
Totalizer inputs measure the number of times that an event has occurred at the input. The
event can be a high to low transition, a low to high transition, or both. Before the change is
considered valid, it is conditioned by the Debounce timer - described in the Digital input
section. Take into consideration the expected time period between events when setting the
Debounce timer.
The count in the totalizer can be reset by two methods: by sending the Reset Code entered
in the Points section, or by using the Reset Input selection in the Hardware setup.
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 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.