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Configuration using the PC 4-10
B1272M001 BARNETT ENGINEERING LTD. ProTalk Cv2
Minimum: 0
Maximum: +100.0
Low Setpoint: +25.0
High Setpoint: +75.0
Hysteresis
Hysteresis is a quick method of establishing the reset values for the high and low
setpoints. After an analog reading has exceeded the setpoint, either high or low, it
must pass through the reset value before it is considered to have returned to normal.
This prevents a reading that is hovering around a setpoint from constantly going in
and out of alarm. The more unstable the reading, the larger should be the hysteresis.
Hysteresis is calculated as a percentage of the decimal span and then used as an
offset from the setpoint. For the low setpoint, the reset will be above the setpoint and
for a high setpoint, the reset level will be below.
Default Hysteresis: 10% of decimal span.
Units
If you require engineering units to be announced after the numeric value of the
Analog Point, set them in the Units section. Available units are listed in the Points -
Totalizer section.
On/Off Output Point
In addition to the common settings described previously, there are two DTMF control
codes used with an On/Off output point.
DTMF On Code
When the Cv2 receives the DTMF On code, it sets the output port to the On state. After
the code has been received and the output port set, the Cv2 announces the current status
of the output.
This code can be 1 to 7 digits in length and may use any of the 16 DTMF digits
including A, B, C, and D.
Default DTMF On Code: an empty string - no On Code.
DTMF Off Code
When the Cv2 receives the DTMF Off code, it sets the output port to the Off state.
After the Off code has been received and the output port cleared, the Cv2 announces the
current status of the output.
This code can be 1 to 7 digits in length and may use any of the 16 DTMF digits
including A, B, C, and D.
Default DTMF Off Code: an empty string - no Off Code.
Timed Output Point
In addition to the common settings, there are two DTMF control codes used with an Timed
output point.
DTMF On Code
When the Cv2 receives the DTMF On code, it sets the output port to the On state and
the timer begins operation. After the On code has been received and the output port set,
the Cv2 announces the current status of the output. If the timer is set for a short