Data Sheet for Product

Predator Three Zone Loop
Application Data Sheet
Document No. 588-154 Page 1 of 27
Sequence of Operation
The Three Zone application has been expanded to accept inputs from up to three
Talon 10K Thermistor room temperature sensors while continuing to perform
general-purpose loop control and I/O expansion routines similar to the standard
Four Loop controller. Due to the application flexibility, the sequences are
dependant upon the configuration of the I/O and conversion components.
The controller reads input values from local sensors and network input variables.
Input processing software generates data in temperature, percentage and
Boolean formats according to the selected configuration. The controller applies
scaling and translation functions to process the input data. It may include
calculating a PID setpoint from an outside air temperature measurement.
Using the input and setpoint values, the controller calculates PID values. Four
PIDs execute at a range of sample rates. Two PIDs run every 20 seconds. For
faster systems, a one-second loop and a two-second loop can be used. Each PID
can be separately enabled and disabled in response to network inputs or sensor
values.
The min/max/average function selects among temperature or percent values to
deliver the appropriate signal to an output device or PID.
The controller drives output signals in a variety of ways. Analog outputs are set
up to work through any portion of a PID’s output range. Triacs are switched in
response to PID signals with algorithms for floating control motors, staged output
or pulse width modulation.
Inputs
The Inputs component collects data from room temperature sensors, physical
terminal inputs (IN5 and IN6), supervisory controllers or remote sensors (network
inputs) for use within the application.
The Three Zone application includes the following input types:
 Room Temperature Sensor (RTS) Inputs: RTS inputs read physical space
temperature, setpoint and bypass values from up to three TALON room
temperature sensors and report them to the network. This component
includes occupancy control.
 Physical Inputs: Physical inputs read the values from terminals IN5-IN6 on
the Predator Three Zone controller and report them to the network.
 Network Inputs: Network inputs read the value of up to four temperature
inputs and up to two percent inputs from the network. These inputs may be
used to capture data from a remote sensor, or the output from another
controller.