ITT PumpSmart PS220, Руководство по конфигурации и эксплуатации

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PS220 Configuration & Operation Guide
173 PS220
Function & F
eatures
Multivariable Control
The PumpSmart PS220 Multivariable Control function will allow the Primary Process Controls Set-
point to be varied, and or offset, with a second process transmitter signal.
This functionality can be configured with the PumpSmart PS220 Configuration Wizard.
To access this Wizard from the Home Screen, follow the path:
Menu>PS220 Configuration>Multivariable>
The individual steps that will be performed are:
1. Enable the Multivariable Control Functionality
Basic startup must be performed prior to configuring this function. When running this Wizard, a
message will prompt you to do this if you have not already.
2. Configure the source for the Secondary process transmitter
The Secondary Process Transmitter is the device that will measure the conditions that affect how
the PS220 will adjust the active setpoint (reference). Your choices are from any unused Analog
Input, AI1, AI2, etc. This selection requires that it has not already been used in other functionality.
When selecting this Analog, it will be automatically identified as “Proc Trans 2” in the configura-
tion settings
To be sure if it has not been configured for use previously. Check the Analog Input Settings in
Group76. To access this from the Home View follow the path: Menu>Parameters>Complete
List>Scroll down to Group 76 AI/AO Config>
3. Configure the Scale of the Secondary Process Transmitter
The Minimum and Maximum values of the “Electrical Values” will be established. These are in mA
or VDC. Refer to the section on Analog Inputs for more detailed information.
4. Configure the Limits of Operation
The limits of operation define the full interaction between the Analog Input you have selected in
the previous step with the Primary Setpoint (Reference). Please refer to the example at the end of
this section for assistance with the individual limit steps.
A. Configure the Level 1
B. Configure the SPT LO
C. Configure the LO INTRCPT
D. Configure the LEVEL 2
E. Configure the SPT HI
F. Configure the Hi INTRCPT
When configuring the Multivariable Control function, it is helpful to plot how you will want your
set-point to behave in relation to the second analog inputs signal. This should assist you with
understanding this functionality and how to correctly configure the use of it. We suggest using
diagrams like the one shown below:
Note:
This is only available for Single Pump Applications.