PowerTec DFS-1 manual Master Preset Speed, Slave Ratio Preset, Engineering Units, Base Ratio

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12.MASTER PRESET SPEED

USE PARAMETER #12 TO SET A PRESET SPEED WHICH CAN BE TOGGLED IN AND OUT. RANGE OF VALUES: 0000 0000h to 0000 2710h

0 TO 10,000 (decimal)

Default Value: 0000 00C8h

100 (decimal)

The MASTER preset speed is the speed to which the motor will go when a PRESET input is activated on one of the Digital inputs (any of the seven digital inputs may be programmed as a PRESET input) when the DFS-1 is in the MASTER mode. If more than one input is programmed as a PRESET input, they must both be present to activate the PRESET Speed function (the inputs are logically ANDed).

13.SLAVE RATIO PRESET

USE PARAMETER #13 TO SET A PRESET RATIO WHICH CAN BE TOGGLED IN AND OUT. RANGE OF VALUES: 0000 0000h to 0001 869Fh

0 TO 99,999 (decimal)

Default Value: 0000 2710h

10,000 (decimal)

The SLAVE preset ratio is the ratio to which the motor will go when a PRESET input is activated on one of the Digital inputs (any of the seven digital inputs may be programmed as a PRESET input) when the DFS-1 is in the SLAVE mode. If more than one input is programmed as a PRESET input, they must both be present to activate the PRESET Speed function (the inputs are logically ANDed).

Note: For all ratio setpoints, 4 decimal places are implied. Therefore, the maximum ratio setpoint is 9.999.

14.ENGINEERING UNITS

USE PARAMETER #14 TO SET THE ENGINEER- ING UNITS AT MAXIMUM MOTOR SPEED. RANGE OF VALUES: 0000 0001h to 0001 869Fh

1 TO 99,999 (decimal)

Default Value: 0000 06D6h

1750 (decimal)

Engineering Units (EGU) define the relationship between motor speed or torque and process reference points. It allows setting and reading of parameters in terms other than speed and torque. The basic rela-

tionship between motor speed and EGU is defined in parameter #14, which sets the value of EGU’s at full motor speed. This parameter is used to determine the relationship between units of commanded speed and RPM. The number entered in this parameter is equivalent to the number in parameter #6. This allows the user to enter speed commands in engineer- ing units (such as Feet Per Minute, Yards Per Minute, etc).

Speed commands entered by commands #82 and #84 are entered in terms of this parameter. If the value of this parameter is the same as the value of parameter #6, then there is a 1:1 relationship between the Engineering Units and the RPM (i.e., enter 1750 (06D6h) as a speed command for 1750 RPM).

However, if this parameter is set to 1000 (03E8h) and #6 is set to 1750, then the relationship is 1:1.75. Entering 1000 (03E8h) as a command results in 1750 RPM, but entering 500 (01F4h) results in 875 RPM.

15.BASE RATIO

USE PARAMETER #15 TO SET THE “GEAR RATIO” OF THE MOTOR IN A SLAVE SYSTEM. RANGE OF VALUES: 0000 0001h to 0001 869Fh

1 TO 99,999 (decimal)

Default Value: 0000 2710h

10,000 (decimal)

This is the “gearing” ratio which corrects for the mechanics of the system and also for differences in motor speeds. The output frequency at TB2:B terminals 10 (+) and 11(-) is determined by the settings of the maximum motor speed (parameter #6) and the encoder PPR (parameter #7). The output frequency will be:

Output Reference Frequency = Motor max RPM x Encoder PPR x 16 / 60

A 1750 RPM motor with a 120 PPR encoder puts out a reference frequency of 56 Kilohertz. This frequency varies with the commanded speed. When this frequency is used as a reference, it is first multiplied by the base ratio, and then by the SET- POINT. These steps change the frequency to the proper level.

For example, it is generally useful in a slave

system to be able to enter a SETPOINT of 1.0000 on

Revised 7/95

DFS-1 Manual

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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 Retrofitting the Model 1000,1000A, or 1000AR Communication ProtocolMenu and Keypad Hierarchy Revised 7/95 Introduction Summary of Warranty and Disclaimer Power Connections ConnectionsMotor Encoder Cable Analog InputsFrequencyinput Analog OutputsFrequencyoutputdigital Inputs Communications Digital OutputsDigital Out #4 Reverse This page WAS Intentionally Left Blank Default Setup Revised 7/95 Power Supplies Input Setup FunctionThis Supply is for the Motor Encoder only VDCFrequency Inputs Outputs Digital InputsInput #1 Reference Frequency Input Outputs #1 Reference Frequency OutputStandard RS-485 19.2K, and 38.4K baudCable Nodes MaximumThis page WAS Intentionally Left Blank Local / Remote Control Unit IDBaud Rate Number Baud Rate Modes of Operation Communications Protocol To 1 decimal Encoder Pulses PER Revolution Maximum Motor SpeedUSE Parameter #6 to SET the Absolute Maximum Motor Speed Master Ramp UP Time Master Ramp Down TimeSlave Ramp UP Time Slave Ramp Down TimeMaster Preset Speed Slave Ratio PresetTo 99,999 decimal Default Value 0000 06D6h Engineering UnitsTo 32 decimal Default Value 0000 0001h Analog Input #1 Mode SelectMaximum Ratio Analog Input #1 Signal Conditioning Analog Input #1 LOW Engineering Units EGUCenter value Future useAnalog Input #2 Mode Select Analog Input #2 Signal ConditioningAnalog Input #1 High Engineering Units EGU Analog Input #2 LOW Engineering Units EGUAnalog Output #1 Mode Select Analog Output #2 Mode SelectAnalog Output #1 LOW Engineering Units EGU Analog Output #1 High Engineering Units EGUAnalog Output #2 LOW Engineering Units EGU Default Value 0000 0096hAnalog Output #2 High Engineering Units EGU Digital Input #1 Function Digital Input #2 FunctionDigital Input #3 Function Digital Input #4 FunctionDigital Input #5 Function Digital Input #6 FunctionDigital Input #7 Function Digital Output #1 FunctionDrive Gain Setting Drive Stability SettingDigital Output #2 Function Digital Output #3 FunctionDrive Regenerative Current Limit Pulse MultiplierModulation and Operation Modes Jump or MOP OperationMaster Jump UP Amount Master Jump Down AmountSlave Jump UP Amount Slave Jump Down AmountCommunications Turnaround Delay Input Debounce ValueMinimum Ratio Float or FreezeSlave JOG Ratio Slave Preset #2 Master Preset #2Contactordelay 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 Communications Setup This parameter selects the Powertec binary protocolSET Parameter #56 for Communications Turn around Delay 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 Dlestxuidcmddleetxcsm DLESTXUIDCMDCS4CS3 CS2CS1DLEETXCSMDlestxuidnakerrdleetxcsm ERRResponse If no errors and unit i.d. does not equal Response If no errorsDlestxuidackdleetxcsm DlestxuidcmdprmdleetxcsmDLESTXUIDCMDPRMVL4 DlestxuidcmdatddleetxcsmDlestxuidcmddtadleetxcsm DLESTXUIDACKDA4DA3DLESTXUIDCMDDTAVL4 DlestxuidcmddigdleetxcsmWhere Is unused Is Jog Is Preset Is Contactor Aux DLESTXUIDCMDDIGVL4BIT PSN SML BIT PSN SMHMessage DLESTXUIDCMD0000 SmhsmldleetxcsmBIT PSN RML 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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