Johnson Controls System 450 Series Installation Instructions And Operators Manual page 22

Setting Up the Integration Constant, Update Rate, and Output Deadband
The System 450 Integration Constant (I-C), the Update Output Signal Rate (UP-R), and the Output Signal Strength
Deadband (bNd) are powerful tools for controlling the analog outputs and your application's process loops.
Depending on your control system application, setting up the I-C, UP-R, or bNd values to values other than the
factory-default values can significantly change the behavior of an analog output. Refer to the System 450 Series
Modular Control Systems with Communications Control Modules Technical Bulletin (LIT-12011826) for more
information.
IMPORTANT: If you set the I-C, UP-R, or bNd values to values other than the default value, you should operate
and observe the affected analog outputs and process loops through the entire range of control. Failure to
observe and adjust an analog output set up to use the I-C, UP-R, or bNd features can result in unexpected
behavior and out of range conditions in the affected process loops.
Table 10 provides information, procedures, guidelines, and screen examples for setting up analog outputs on
System 450 control modules with communications.
See Figure 6 on page 30 for example menu flow of the Analog Output 3 set up in Table 10.
Table 10: System 450 Setup Screen Information and Procedures for Analog Output (Part 1 of 4)
LCD Screen Name, Description or Function, User Action, Example
Analog Output Setup Start Screen: The output numbers and the output type (relay or analog) are
determined by the module types and configuration of your control system's module assembly and are
automatically assigned when you connect power to the module assembly. (See Setting Up the Control
System in the UI on page 8.)
Note: You must set up the system's sensors before you can set up the outputs.
1. Press
The screen example shows the Analog Output Setup Start screen for Output 3.
Sensor Selection Screen: The sensor you select here determines this output's setup parameters and
values, including condition type, unit of measurement, minimum proportional band, default setup values,
and setup value ranges for several of the remaining output setup screens. If a sensor is not selected here,
this output's remaining setup screens do not appear. If a sensor is already selected for this output, the
Sensor Selection screen does not appear here, and the Setpoint Selection (SP or dSP) screen appears
instead.
Notes:
•
•
2. Press
• For standard control action, select Sn-1, Sn-2, or Sn-3.
• For standard control action with High Input-Signal Selection, select HI-2 or HI-3.
• For differential control action, select Sn-d.
Then press
The top screen example shows the initial Sensor Selection screen for Analog Output 3 before a sensor
is selected. The remaining screen examples show some of the sensors that may be available for
selection. For the analog output example, Sn-1 is the selected Sensor for Output 3 as shown in the
second screen.
System 450™ Series Control Module with Ethernet Communications Installation Instructions
to go to this output's Sensor Selection screen.
You must select a sensor in this Sensor Selection screen and the selected sensor must be already
set up in the System 450 UI. (See Setting Up System 450 Sensors.)
On System 450 control modules with network communications, the functional sensors Sn-d and
HI-2 are available if Sn-1 and Sn-2 are the same Sensor Type. If Sn-1, Sn-2, and Sn-3 are the
same Sensor Type, the functional sensor HI-3 is also available. The Binary Input sensor is not
available for analog outputs.
or to select the sensor that this output references:
to save your sensor selection and go to the Setpoint Selection screen.
22