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FAQ - DC1

1) How do I default the drive parameters?

DC1 variable frequency drives can be restored to their default configuration

by using the following button combination: + + Stop button. When

using this combination, hold down the buttons for two seconds until "P-dEf"

is shown on the display.  Press the okay button to confirm.

2) I’m only seeing parameters P-1 through P-14, how do I access the remaining parameters and where are the parameters listed in the manual?

To access the extended parameters, parameter P-14 needs to be set to a value of 101.  The list of parameters in the 12/13 manual release is located in the manual under List of Parameters. (The parameter list is also included at the end of this document)

 

3) How do I start the drive from the keypad and use external analog sources for a reference?

 

To enable an external reference while maintaining a keypad start you will need to change the Keypad/Terminal mode at parameter P-12 to a value of 1 for forward only direction or a value of 2 for forward and reverse operation (reverse is activated by pressing the okay key while viewing the keypad reference value H     0.0 prior to starting the drive and the reference is above 0.0 OR by pressing okay while the drive is running and the frequency reference is above 0.0).  With P-12 set to 1 or 2 you then need to set P-15 to 4 to utilize the I/O terminals for an analog reference on AI1.  This value at P-15 enables Terminal 2 (DIN 1) to be a Run Enable/Interlock, a jumper from T1 to T2 must be made to start from the keypad.  Also DIN3 is the selection point for reference, T1 needs to be jumped to this input to enable AI1 as the reference, left low keypad will be the reference.  The tables can be referenced in the manual in the List of Parameters or at the end of this document (see Keypad Mode (P-12 = 1, 2)).

 

4) How do I start the drive from the I/O terminals and use the keypad for a reference?

 

To enable an external start or terminal mode start while maintaining the keypad as the reference the control mode at parameter P-12 will need to be set to a value of 1 or 2.  Parameter P-31 needs to be set to a value of 2 for a minimum speed reference start (value at parameter P-02) or 3 for previous keypad reference start.  Parameter P-15 changes the operation for the terminal functions, this value would need to be changed if a reverse or interlock option is needed.  The tables can be referenced in the manual under the List of Parameters or at the end of this document (see Keypad Mode (P-12 = 1, 2).

 

5) How do I change the keypad reference/speed on the drive?

 

The keypad reference/speed can be set or changed when the keypad mode P-12 is enabled (set to value 1 or 2).  This can be performed while the drive is running or stopped.  To make the change while stopped press the OKAY key until STOP is displayed, press the Green circle to make H     0.0  display.  Using the + you can change the keypad frequency/speed.  To make the change while running press the OKAY until H   0.0 is displayed and then using the + you can change the keypad frequency.

6) How do I copy parameters from one drive to another?

 

To allow copying from one drive to another a communications adapter or cable would need to be obtained.  Currently the two offerings are:

Bluetooth copy/paste communication stick – Part Number: DX-COM-STICK

USB PC connection kit – Part Number: DX-COM-PCKIT

  • The Bluetooth module will communicate with a  PC that has a Bluetooth antenna.  This module also can copy and paste directly from one drive to another.  To perform this option insert the module into the drive’s RJ-45 Jack.  Ensure that the left switch indication is in the UNLOCK position.  Once power and communication to the stick has been established a blue and green LED will light up.  Pressing the arrow facing the LEDs will copy the parameters to the stick.  After pressing this arrow the green LED will flash indicating the copy activity, once this has completed the drive’s display will show PASS-r.  Pressing the arrow facing the drive will activate the copying of the parameters from the stick to the drive.  The green LED will flash indicating the activity and once the transfer has been made the VFD will display PASS-t.
  • The PC kit uses the DrivesConnect software that can be obtained at www.eaton.com/DC1.  This is the PC tool used to go online with the drive.  After going online with a drive you can save a parameter file and then load another drive with that file.  You also have the ability to use this software tool to create a virtual drive parameter set.  Once a set has been saved or created you can connect to a  drive and load that drive with the virtual parameter set.  If you need more assistance with this kit or PC tool please contact the Eaton Drives TRC at 1-800-322-4986 or email: TRCDrivesTechSupport@Eaton.com.

 

7) Why does the drive stop and display “0 - I” when I press start or attempt to run the drive?

 

When the drive stops and displays 0 - I it is displaying the fault code for Overcurrent.  This is typically due to a short on the output or motor regeneration prior to start on the VFD causing an instantaneous surge of current.  Motor shorts from winding to winding could be occurring, a short on the cabling, or a short on a filter or contactor also could be the cause.  Remove all output connections to the VFD.  If the VFD runs and can ramp to full speed then the connections made to the output of the VFD will need to be checked.  If the drive trips with no cabling connected to the U V W terminals then the drive would need to be replaced.  Doing a meg test on the cabling from cable to cable and a meg test on the motor winding to winding would be recommended to rule out the cabling or motor as the shorted component (this should be done at 2.0 x relative DC bus + 1000V, ex: 480 line voltage x 1.414 =  678 VDC, 678 x 2 + 1000 = 2357 VDC).

 

8) Why will the motor not get up to full speed and eventually stop and display “I.t-trP”?

 

Your motor is not getting up to speed due to current limiting.  The drive is designed to protect the motor and limit the current based on the settings in the VFD.  The motor current setting is parameter P-08 and should be set to the motor’s nameplate FLA.  The drive will continue to deliver that amount of current to the motor based on the linear V/Hz curve.  If the motor generates the service factored value of current the drive will begin to limit the current and stop accelerating the motor.  After a given amount of time, depending on the curve and speed the drive is at, the drive will eventually trip due to motor thermal protection.  This is usually due to overloading, a jammed load, oversized motor, incorrect cable length, or an incorrectly sized system.  Try decreasing the acceleration time at parameter P-03 in seconds or decrease the load on the motor.

 

9) How do I enable the auto-restart function on my drive after a power cycle or power failure?

 

To enable an auto-restart function on the DC1 drive you will need to use an I/O start configuration.  This is configured by setting P-12 to a value of 0.  Refer to the P-15 parameter tables to configure the I/O selections.  The parameters are located in the manual under List of Parameters and are also at the end of this document.  You then need to configure P-30 to Auto - 0 to enable auto-restarting.  Once this has been configured ensure that the start signal is maintained from T1 to the T2 (FWD) (or T3 (REV) if a reverse start is being used) in a power cycle or power outage condition.  NOTES: Setting 10 and 11 cannot be used, these are momentary start functions.  To do an auto-restart after a fault condition you need to set parameter P-30 to a value greater than Auto - 0.

 

10) Why does my minimum speed value and maximum speed value displaying RPM instead of Hz?

 

Your minimum frequency parameter P-02, and maximum frequency P-01 will be displayed in RPM if a value greater than 0 is entered into parameter P-10 (Motor Rated Speed).  By changing the value at P-10 to the RPM of the motor will also allow the operating monitor screen to display the RPM value while running (this is the value that is displayed without an A or H).  Be sure to set P-10 BEFORE you set P-01 or P-02.