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Basic Installation and Operation
Guide
SP.12 System Setpoints (Setpoint Page 12)
(Security Level 3)
SP12.1 Default Display Screen: This Setpoint group allows the user to choose the default screen the Soft Starter
displays while the motor is running. Select the metering page number (1-3), then, select the metering screen number. The
range varies depending on the selected page. To display a default screen, program the following two Setpoints:
Metering Data Page#: Range is Page 1 - 3.
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Metering Data Screen#: If Page 1 is selected as the default page, then Screens 1- 10 are available. If Page 2
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Screens 1-29 are available. If Page 3 is selected then Screens 1-6 are available. (See Metering Menu, MP.1, for
screen number assignment.)
SP12.2 Alarms: Configures the RTD failure alarm and the thermal register alarm.
RTD Failure Alarm: If enabled, and an RTD shorts or open, an alarm occurs.
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Thermal Register Alarm: Sets a level in the thermal register to generate an alarm when the Thermal Register
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Capacity Used has exceeded this level.
Thermal Alarm Delay: The amount of time that the Thermal Register Used must exceed the Setpoint before an alarm
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condition will occur.
SP12.3 Thermal Register Setup Information: This Setpoint group will configure the thermal register and indicate to the
soft starter which inputs to use when thermal modeling.
Cold Stall Time: Enter the time from the motor manufacturer's specification sheet or use the time defined by the OL
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Class. This Setpoint is used to define the thermal capacity of the motor.
Hot Stall Time: Enter the amount of time specified by the motor manufacturer or use half of the time defined by the
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OL Class.
Stopped Cool Down Time: The time the motor needs to cool down after it has stopped. Use only the data provided
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by the motor manufacturer. This Setpoint is used to configure the cooling rate of the thermal register.
Running Cool Down Time: The amount of time the motor needs to cool down while running. Use only the data
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provided by the motor manufacturer.
Relay Measured Cool Rates: When the RTD option is supplied, the Soft Starter can be configured to use the
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measured cooling rates from the RTDs instead of the programmed settings. This Setpoint should only be enabled
when the RTD option is present.
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Thermal Register Minimum: Sets the value in the thermal register which represents a motor running at the
nameplate current (with no overheating or negative sequence currents present).
Motor Design Ambient Temperature: Use the data from the motor manufacturer's specifications. When RTD option
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is supplied, this Setpoint will be the base point for the RTD biasing of the Thermal Register.
Motor Design Run Temperature: Use the data from the motor manufacturer's specifications. This Setpoint defines
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the operating temperature rise of the motor at full load amps or 100% load.
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Motor Stator Max Temperature: This represents the maximum temperature the stator insulation will withstand. The
user may choose to use the temperature setting of the insulation class (selected in Setpoint Page 1) or enter a
specific maximum temperature. This value should not exceed the stator's insulation temperature. This maximum
temperature represents 100% thermal capacity.
U/B Input to Thermal Register: Always enabled. It allows the soft starter to use the line current imbalance
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information to bias the Thermal Register.
TOSHIBA
JKSSS Series Solid State Soft Starters
68
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