ITT PumpSmart PS220, Руководство по конфигурации и эксплуатации

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PS220 Configuration & Operation Guide
171 PS220
Function & F
eatures
Parameter Name Value/Range Notes
81.02 VALUE DECREASE 0-100%
5% [default]
Defines the percentage difference decrease between
the system set point versus the actual value to initiate
staging of an available lag pump. Setting range = 0.0 –
100.0% of set point.
81.03 VALUE INCREASE 0-100%
Defaults to same value as
81.02 VALUE DECREASE
Defines the increase in the systems set point desired
when lag pumps start. This value is cumulative for each
additional lag pump that stages on. This is used to
compensate for higher friction losses form increased
flow rate in systems that need to be overcome as
additional pumps add more flow into the system.
The formula used is Set point Increase = Value
Decrease - Value Increase
Setting range = 0.0 – 100.0% of set point. The default
setting for is equal to the value set in 81.02. (No
increase in setpoint as additional pumps stage on)
The setpoint will decrease at the same rate as pumps
destage.
External 24V DC Power Sourcing
1. Control Board. There is NO NEED to use a remote power source to power the PS220
PumpSmart Drives control power circuit boards. It should be used only if the keypad needs to
remain active if the drive were to lose Mains Supply Power.
The control board requires 24VDC ±10%, typical current consumption is 250mA and maximum
current consumption with optional modules is 1200mA.
When externally powering the control board parameter 95.04 “CTRL BOARD SUPPLY” must be
set to “EXTERNAL 24VDC” to avoid warnings displayed when the main supply power is discon-
nected.
2. It is recommended that if one process transmitter has been provided, and it is going to be
shared among all of the PS220’s in a Multipump system that the power to it be from an external
source. By externally powering the power to that transmitter’s circuit, it will remain powered if
any of the PS220’s, the Pumps, or the Motors need to be serviced, locked out, and taken out of
service.
Parameter Name Value/Range Notes
95.04 CTRL BOARD SUPPLY INTERNAL 24VDC [default]
EXTERNAL 24VDC
By selecting EXTERNAL 24 the PS220 is instructed that
the control board is being externally powered.