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To assign inputs or outputs to points
Special (BI)
4
Binary
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
value used in subsequent control logic. For example, set
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
Analog (BAO)
0-10 Vdc
2-10 Vdc
Binary (BBO)
Relay
1
The Analog Output microblock uses the
output signal (Volt, mA, or psi) sent from the Zone Ctrl II to an actuator. For example, set
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.
Zone Ctrl II and
VAV Zone II Secondary Duct Installation and Start-up Guide
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Special
Online flow sensor status
and
Min
Max
I/O Type
Sensor/Actuator Type
Electrical
Linear Full Range
0–10 Volt
Electrical
Linear w/Offset,
0–10 Volt
2–10 Volts
Relay/Triac Output
N/A
and
Min
values to linearly translate the signal into the engineering
to 0 and
to 10 for a 4–20 mA sensor that
Min
Max
values to linearly translate its Snap wire value into a physical
Max
32
N/A
Min/Max
Engineering values associated with
0 Vdc (Min) and 10 Vdc (Max)
Engineering values associated with
2 Vdc (Min) and 10 Vdc (Max)
N/A
to 0 and
Min
Max
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