PowerTec DFS-1 Analog Input #1 Signal Conditioning, Analog Input #1 LOW Engineering Units EGU

Page 30

As a Speed Reference input ( ...01h), Analog input #1 sets the speed of the controlled motor directly if the DFS-1 is set up in Master Mode (parameter #5 - VL2 VL1).

If the DFS-1 is in SLAVE mode, Analog Input #1, when set to ...01h will act as a Ratio SETPOINT.

The External Torque Limits are used to set limits on the motor current which are below the current limit level. When parameter #5 VL4 VL3 is set to 00 01h, or 00 02h, Analog Input #1 may be set to ...03h or ...04h respectively to supply the torque limiting reference.

The External Horsepower Limit sets the maxi- mum horsepower produced by the drive. Horsepower is the PRODUCT of speed and torque. When motor speed is low, motor current is high, and when speed is high, current is low. The drive increases speed until sufficient load is developed and the product of load and speed equals the setpoint. After that is achieved, increasing load reduces speed, and decreasing load increases speed.

18.ANALOG INPUT #1 SIGNAL CONDITIONING

USE PARAMETER #17 TO SELECT THE FORM OF THE SIGNAL AT ANALOG INPUT #1. RANGE OF VALUES: 0000 0000h to 0000 001Fh

0 TO 32 (decimal)

Default Value: 0000 0001h

1 (decimal)

Six types of signals will be accepted by Analog Input #1. Parameter #18 selects the form of signal to be processed.

The six types of signals are:

0000 0000h

-10VDC to +10VDC

 

bipolar voltage input with zero

 

center value

0000 0001h

0 to +10VDC

 

unipolar voltage signal

0000 0002h

0 to +5VDC

 

unipolar voltage signal

0000 0003h

1 to +5VDC

 

unipolar voltage signal

0000 0004h

0 to 20mA

 

unipolar current signal

0000 0005h

4 to 20mA

 

unipolar current signal

0000 0006h

to 0000 001Fh

 

Undefined - Reserved for

 

future use

If an undefined mode (...06 through ...1F) is selected, Analog Input #1 will be inoperative.

Choosing the incorrect signal conditioning for the actual input signal will result in erratic operation.

19.ANALOG INPUT #1 LOW ENGINEERING UNITS (EGU)

USE PARAMETER #17 TO SELECT THE THRESHOLD OF ANALOG INPUT #1 EFFECT. RANGE OF VALUES: FFFE 7961h to 0001 869Fh

-99,999 to +99,999(dec.)

Default Value: 0000 0000h

0 (decimal)

(See Parameter 14 for the definition

and purpose of EGU) Parameter #19 sets the threshold level for

effectiveness of Analog Input #1 at the lowest signal level.

Assume that the maximum speed of the 1750 RPM motor is set to 12500 EGU’s in parameter #14 (representing, perhaps, 125.00 RPM on an extruder screw) and the Analog input is set for a Speed Reference Input of 0 to +10VDC. The default value of parameter 19 is 0. This means that when 0VDC is present at Analog Input #1, the result will be zero speed.

Now, if we want to set a minimum speed on this system, we can set a value of 500 in parameter #19. This means that when 0VDC is present at Analog Input #1, the motor will run at a speed of 500/12500 or 4 percent (70 rpm) of the maximum speed of the motor. (see also parameter #20).

Revised 7/95

DFS-1 Manual

Page 25

POWERTEC Ind. Corp.©

 

 

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Contents DFS-1 Microprocessor Based Brushless D.C Motor ControllerSubsidiary Powertec Industrial Corporation Errata Additional Info OctoberInstallation Mounting -- Read this Entire Section Before StartingContents DFS 1 Setup Communication Protocol Retrofitting the Model 1000,1000A, or 1000ARMenu and Keypad Hierarchy Revised 7/95 Introduction Summary of Warranty and Disclaimer Power Connections ConnectionsMotor Encoder Cable Analog InputsFrequencyinput Analog OutputsFrequencyoutputdigital Inputs Digital Outputs CommunicationsDigital Out #4 Reverse This page WAS Intentionally Left Blank Default Setup Revised 7/95 This Supply is for the Motor Encoder only Power SuppliesInput Setup Function VDCInput #1 Reference Frequency Input Frequency Inputs OutputsDigital Inputs Outputs #1 Reference Frequency OutputCable Standard RS-48519.2K, and 38.4K baud Nodes MaximumThis page WAS Intentionally Left Blank Baud Rate Local / Remote ControlUnit ID Number Baud RateCommunications Protocol Modes of OperationTo 1 decimal Maximum Motor Speed Encoder Pulses PER RevolutionUSE Parameter #6 to SET the Absolute Maximum Motor Speed Slave Ramp UP Time Master Ramp UP Time Master Ramp Down Time Slave Ramp Down TimeTo 99,999 decimal Default Value 0000 06D6h Master Preset SpeedSlave Ratio Preset Engineering UnitsAnalog Input #1 Mode Select To 32 decimal Default Value 0000 0001hMaximum Ratio Center value Analog Input #1 Signal ConditioningAnalog Input #1 LOW Engineering Units EGU Future useAnalog Input #1 High Engineering Units EGU Analog Input #2 Mode SelectAnalog Input #2 Signal Conditioning Analog Input #2 LOW Engineering Units EGUAnalog Output #1 LOW Engineering Units EGU Analog Output #1 Mode SelectAnalog Output #2 Mode Select Analog Output #1 High Engineering Units EGUDefault Value 0000 0096h Analog Output #2 LOW Engineering Units EGUAnalog Output #2 High Engineering Units EGU Digital Input #3 Function Digital Input #1 FunctionDigital Input #2 Function Digital Input #4 FunctionDigital Input #7 Function Digital Input #5 FunctionDigital Input #6 Function Digital Output #1 FunctionDigital Output #2 Function Drive Gain SettingDrive Stability Setting Digital Output #3 FunctionModulation and Operation Modes Drive Regenerative Current LimitPulse Multiplier Jump or MOP OperationSlave Jump UP Amount Master Jump UP AmountMaster Jump Down Amount Slave Jump Down AmountMinimum Ratio Communications Turnaround DelayInput Debounce Value Float or FreezeContactordelay Slave JOG Ratio Slave Preset #2Master Preset #2 EGU TAG SelectThis page WAS Intentionally Left Blank DFS 1 Setup Basic Setup of the DFS-1 Controller Master Mode Setup Slave Mode Setup Inputs and Outputs Setup SET Parameter #56 for Communications Turn around Delay Communications SetupThis parameter selects the Powertec binary protocol SET Parameter #3 to Select Which Functions are RemoteError Codes for ON-BOARD Display This page WAS Intentionally Left Blank Communications Protocol Command List Parameter List Dlestxuidnakerrdleetxcsm DlestxuidcmddleetxcsmDLESTXUIDCMDCS4CS3 CS2CS1DLEETXCSM ERRDlestxuidackdleetxcsm Response If no errors and unit i.d. does not equalResponse If no errors DlestxuidcmdprmdleetxcsmDlestxuidcmddtadleetxcsm DLESTXUIDCMDPRMVL4Dlestxuidcmdatddleetxcsm DLESTXUIDACKDA4DA3DLESTXUIDCMDDTAVL4 DlestxuidcmddigdleetxcsmBIT PSN SML Where Is unused Is Jog Is Preset Is Contactor AuxDLESTXUIDCMDDIGVL4 BIT PSN SMHBIT PSN RML Message DLESTXUIDCMD0000Smhsmldleetxcsm BIT PSN RMHAttachmentb Parameter Description DLESTXUIDCMDAMDVL4Additional Info Output Contactor Typical Dynamic Braking Typical This page WAS Intentionally Left Blank Quantity Pin Connector Cable DFS-1 Model 1000 series retro-fit kit consists QuantityRevised 7/95 Appendix B Not visible in some modes Revised 7/95 Powertec Ind. Corp Figures 2 DFS-1 Manual Figures DFS-1 Manual Igur DFS-1 Manual Select AI ModeEnterEnter DFS-1 Manual Igur DFS-1 Manual Sel DFS-1 Manual Igures DFS-1 Manual Figures 29 DFS-1 Manual
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