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ManualsBrandsSiemens ManualsRoom controlsLRC Electronic VAV with HW Reheat and Two Venturi Air Valves (One Supply, One Exhaust) - Analog Output Installation Instructions
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Document No. 588-154 Page 2 of 27
Conversions
Conversion components include those components that accept inputs, perform a
calculation, then output the result to a PID or output within the application.
The Three Zone application includes the following conversion types:
Bypass Function: Monitors up to three room temperature sensors and outputs
a signal when any of the sensors go to bypass mode.
Function: Calculates the minimum, maximum or average value of up to four
inputs.
Map: Scales an input from the configured input range to the configured
output range.
Space Temperature Function: Calculates the minimum, maximum or average
value of up to three space temperatures.
PIDs
The Predator Three Zone application includes four PID loop components that
respond to inputs (temperature or percent) received from local sensors, network
inputs or conversion components. PIDs perform loop calculations based on a set
of user-defined configuration properties, and report the result to the network via
nvoPID1-nvoPID4. The output of each PID is a percent value.
The range of calculation rates is intended to let you apply them according to the
speed of the controlled processes. Loop output calculations are performed
according to the schedule below:
PID1 and PID2 (dedicated temperature loops): Calculates every 20 seconds
PID3 and PID4 (temperature or percent loops): Calculates every 2 seconds to
allow for a faster process.
Outputs
Outputs accept various inputs from within the application, then operate the
corresponding analog, digital or motor output devices.
The Three Zone application includes the following output types:
Analog Outputs: Analog outputs accept percentage inputs and are used to
control equipment such as damper actuators and valve motors.
Digital Outputs: Digital outputs accept percent inputs and are used to control
single-contact digital control devices such as fan control relays, staged
heating relays, lighting contacts, and compressor relays.
Motor Outputs: Motor outputs accept percentage inputs and are used to
control floating motor outputs.