Carrier Zone Ctrl II - Resolution Values; Offset;Polarity Values

To assign inputs or outputs to points
Zone Ctrl II and
VAV Zone II Secondary Duct Installation and Start-up Guide CARRIER CORPORATION ©2019
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Resolution values
Resolution
is not particular to a type of input or output, but the driver handles analog and digital (binary) inputs
and outputs differently. To set these values appropriately, you should understand how the driver uses them.
Resolution
Notes
Analog Input (BAI) The driver truncates the microblock's present value according to the resolution.
EXAMPLE
If the calculated present value is 13.789 and you set the
Resolution
to 0.1, the
control program uses 13.7 for any calculations downstream from the microblock.
Analog Output
(BAO)
The driver truncates the wire input value to the microblock before performing any scaling
calculations.
EXAMPLE
If the wire input value is 13.789 and you set the
Resolution
to 0.1, the
microblock uses 13.7 for any scaling calculations.
Digital (Binary)
Inputs
and Outputs
N/A
Offset/Polarity values
Offset/Polarity
is not particular to a type of input or output, but the driver handles analog and digital (binary)
inputs and outputs differently. To set these values appropriately, you should understand how the driver uses
them.
Offset/Polarity
Notes
Analog Input (BAI)
Offset
value (positive or negative) adds a fine adjustment to a sensor reading after all
scaling for calibration.
EXAMPLE
If a sensor reads 74.9°F when the actual measured value is 73.6°F, enter an
Offset
of
–1.3
to calibrate the sensor to the measured value.
Analog Output (BAO) You can use the
Offset
value (positive or negative) to calibrate an output, but you generally
do not need to. If used, the driver adds the offset value to the wire input value before
performing any scaling calculations to determine the Zone Ctrl II's output.
Digital (Binary)
Input (BBI)
Polarity
determines the microblock's present value when no signal is received from the
equipment.
When no signal is received from the equipment, if
Polarity
is set to:
normal
—present value is
off
reversed
—present value is
on
Digital (Binary)
Output (BBO)
Polarity
determines the Zone Ctrl II's output based on the control program's signal to the
microblock.
When the control program's signal to the microblock is
on
, if
Polarity
is set to:
normal
—output is
on
reversed
—output is
off
NOTE
Regardless of
Polarity
, the output will be off if the Zone Ctrl II loses power.