Siemens 125-3208 operating instructions Pulse Frequency

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Startup Procedures

Pulse Frequency

Parameter	Description			Action	Setting/
Parameter	Description			Action	Default
					Default

P1800	Pulse Frequency	1.	Press	to enter the SED2	Minimum = 4
		1.	Press	to enter the SED2
	Sets pulse frequency (kHz) of		parameter mode and to display		Default =
	power switches in SED2. The		r0000.		Varies by
	frequency can be changed in				model
	increments of 2 kHz.	2.	Press	to advance to	(hp/voltage
		2.	Press	to advance to	dependent)
			parameter P1800.		dependent)
	Pulse frequencies > 4 kHz		parameter P1800.
	Pulse frequencies > 4 kHz				Maximum = 16
	selected on 380V to 480V units				Maximum = 16
	selected on 380V to 480V units
	reduce the maximum continuous	3.	Press	to access the
	motor current.		parameter values level.
		4.	Press	to advance to
			desired value.
		5.	Press	to confirm and save
			the setting.

NOTES:

1. Minimum pulse frequency depends on P1082 (maximum frequency) and P0310 (rated motor frequency).

2. At 4 kHz, full output current is obtained up to 50 degrees C (CT mode); over 50 degrees C, full output may be obtained at 8 kHz.

3. If silent operation is not absolutely necessary, lower pulse frequencies may be selected to reduce SED2 losses and radio-frequency emissions.

4. Under certain circumstances, the SED2 may reduce the switching frequency to provide protection against over-temperature.

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Contents SED2 VFD Electronic Bypass Options Page SED2 VFD Electronic Bypass Option Operating Instructions Page Service Statement Page Table of Contents Technical Specifications Troubleshooting Application Feature SetupNotation Symbol Meaning How to Use this ManualManual Organization Manual NotationsReference Documents Where To Send CommentsSafety Instructions Electronic Bypass Option Overview General DescriptionFuses optional Controller Board Inputs and Outputs Controller BoardKeypad Functions ContactorsDescription Pushbutton/IndicatorOutput relay on the Controller board Pushbutton/Indicator DescriptionMechanical Installation Installation InstructionsDimensions and Weights Environmental ConditionsMounting Bypass Dimensions in Inches CentimetersFrame Sizes D and E Conduit Locations Viewed from Bottom Electrical Installation Bypass Power Circuit Routing of Power and Control Wiring For Frame Sizes a and B Disconnect Overload Ground Lug Switch Disconnect Overload Ground Lug Wire Max Safety Precautions Startup ProceduresInstallation Inspection Power-OnDIP Switch Settings for E-Bypass Features Switch Description PositionQuick Commissioning Parameter Description Action Setting Default User Access LevelQuick Commissioning Operation for Europe/N AmericaRated Motor Voltage Rated Motor Current Rated Motor PowerRated Motor cosPhi P308, or Rated Motor Efficiency P0309Rated Motor Speed Rated Motor FrequencySelection of Command Source Start CommandMotor Overload Factor Speed Command Source Selection of FrequencySetpoint Minimum Motor Frequency Ramp-up Time Maximum Motor FrequencyEnd Quick Commissioning Ramp-down timeFlying Start Additional Parameter SettingsFlying Start R0000Search Rate Flying Start Motor Current Flying StartAutomatic Restart Automatic RestartSED2 VFD Electronic Bypass Option Operating Instructions Time to First Restart Number of Restart AttemptsRestart Time Increment Vdc ControllerPulse Frequency Motor Data Identification Motor Data IdentificationMotor Data Identification P0970 Reset to Factory DefaultsParameter Setting Required SED2 Parameter SettingsOverview Application Feature SetupAuto Bypass without Interlock DescriptionExample SED2 Settings SettingsInterlock Application Feature Setup Wiring Example for Interlock Essential ServicesWiring Example for Essential Services Wiring Example for Interlock and Auto Bypass on VFD Fault Interlock and Auto Bypass on VFD FaultSpecifications Description Technical SpecificationsDrive Specifications Description Electronic Bypass SpecificationsSED2 VFD Electronic Bypass Operating Instructons Drive Specifications DescriptionPower-on Initialization Failure Unit Fault Condition TroubleshootingBasic Sanity Description Test Fault Code/Flashes Basic Sanity Test Fault CodesFuses Override JumperFuse Replacement Information VFD0122R2 Troubleshooting Siemens Building Technologies, Inc