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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Special (BI)
4
Binary
Special
Online flow sensor status
N/A
1
The sensor reads a value and sends a corresponding signal (Volt, mA, or psi) to the Zone Ctrl II's physical input.
The Analog Input microblock uses the
Min
and
Max
values to linearly translate the signal into the engineering
value used in subsequent control logic. For example, set
Min
to 0 and
Max
to 10 for a 4–20 mA sensor that
measures velocity from 0.0 to 10.0 inches/second so that when the input reads 4 mA, the microblock outputs a
value of 0. Similarly, when the input reads 8 mA, the microblock outputs a value of 2.5.
2
You can set up a custom translation table on the driver's
Custom Translation Tables pages in the i-Vu®
interface.
3
The control program must have one Pulse to Analog Input microblock for each pulse counting input.
4
The special binary input indicates a communication loss to the airflow sensor. You can use this in your control
program to select the actuator movement in the case of flow sensor fault. Sensor reconnection is detected
automatically and a power cycle is not required. In the microblock popup, under
Hardware Configuration
, set
Expander
to
0
,
Input Number
to
110
, and
I/O Type
to
Special
. To detect a flow sensor fault on the VAV Zone II
Secondary Duct, use
Input Number 111
.
Output values
Output
I/O Type
Sensor/Actuator Type
Min/Max
Analog (BAO)
0-10 Vdc
Electrical
0–10 Volt
Linear Full Range
Engineering values associated with
0 Vdc (Min) and 10 Vdc (Max)
1
2-10 Vdc
Electrical
0–10 Volt
Linear w/Offset,
2–10 Volts
Engineering values associated with
2 Vdc (Min) and 10 Vdc (Max)
1
Binary (BBO)
Relay
Relay/Triac Output
N/A
N/A
1
The Analog Output microblock uses the
Min
and
Max
values to linearly translate its Snap wire value into a physical
output signal (Volt, mA, or psi) sent from the Zone Ctrl II to an actuator. For example, set
Min
to 0 and
Max
to 100
for an Analog Output microblock that receives a 0 to 100% open signal from a PID microblock and that controls
a 0–10 Vdc actuator so that when the PID signal is 100%, the Zone Ctrl II output is 10 Vdc. Similarly, when the
PID signal is 50%, the Zone Ctrl II output is 5 Vdc.
