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DCS 500 Thyristor Power Converter
for DC Drive Systems
25 to 5150 A
Software Description
DCS 500B
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DC Drives 25 to 5150 A
SOFTWARE DESCRIPTION
for version 21.233
Code: 3ADW 000 078 R0301 Rev C
SWDB_E_C.DOC
EFFECTIVE: Aug. 1st, 2001
SUPERSEDES: Rev B Dec. 2nd, 1998
2001 ABB Automation Products GmbH. All rights reserved.
Contents
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General ................................................................................................................................. 1
Software Overview.......................................................................................................... 2
Parameter Sets .......................................................................................................... 2
Saving the program.................................................................................................... 2
Identification of the Converter Software version ......................................................... 3
Identification of the Field Exciter Software version ..................................................... 3
Function Blocks .............................................................................................................. 4
Digital and Analog I/O..................................................................................................... 5
Digital Inputs .............................................................................................................. 5
Digital Outputs ........................................................................................................... 5
Analog Inputs ............................................................................................................. 6
Analog Outputs .......................................................................................................... 9
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Settings and commissioning functions................................................................................. 11
SETTINGS function block ............................................................................................. 11
MANUAL TUNING function block ................................................................................. 12
Autotuning................................................................................................................ 13
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Drive Logic .......................................................................................................................... 16
DRIVE LOGIC function block........................................................................................ 16
Closing Control of the Contactors............................................................................. 16
Opening Control of the Contactors ........................................................................... 17
Run Control.............................................................................................................. 17
Stop Control ............................................................................................................. 18
Reset the drive fault ................................................................................................. 20
Change between parameter set1 and set2 ................................................................... 21
Local/Remote ............................................................................................................... 21
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Speed feedback and speed reference handling .................................................................. 23
Speed scaling to software ........................................................................................ 23
SPEED_MEASURMENT function block........................................................................ 23
Selection of the speed actual measurement............................................................. 24
Incremental encoder ................................................................................................ 24
Analogue Tacho Generator ...................................................................................... 24
Polarity ..................................................................................................................... 24
Scaling of the actual voltage to control..................................................................... 25
Application example ................................................................................................. 25
Actual speed based on EMF .................................................................................... 25
Calculation of speed from the EMF .......................................................................... 25
Filtering of the actual speed ..................................................................................... 25
CONST_REF function block ......................................................................................... 26
SOFTPOT function block .............................................................................................. 26
Reference increment and decrement ....................................................................... 26
Limitation.................................................................................................................. 26
REF_SEL function block ............................................................................................... 26
Changing of the speed direction of rotation .............................................................. 27
RAMP GENERATOR function block ............................................................................. 27
Local / Remote Speed Reference ............................................................................ 27
Holding of the reference ........................................................................................... 27
Ramp Function in Emergency Stop.......................................................................... 27
Selecting of the Ramp function ................................................................................ 28
DCS 500 Software Description
i
 Contents
Limitation of the reference.........................................................................................28
Passing of the RAMP function...................................................................................28
Output follows the speed actual ................................................................................28
Reset the output........................................................................................................28
Acceleration compensation .......................................................................................28
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Speed Control ......................................................................................................................30
REFSUM_2 function block.............................................................................................30
SPEED_ERROR function block .....................................................................................30
Speed Step for testing...............................................................................................30
Error value filter.........................................................................................................30
Window Control Principle ..........................................................................................31
Application example for Window Control ...................................................................31
Enabling the Window Control ....................................................................................31
Determining the Window Size ...................................................................................31
Output connection points ..........................................................................................31
SPEED_CONTROL function block ................................................................................32
Gain and Integral time settings..................................................................................32
The P-gain reduction.................................................................................................32
Output Limitation.......................................................................................................32
Integral part Setting during the Control Mode Changing............................................33
Principle of Drooping................................................................................................33
Drooping Adjustment.................................................................................................33
SPEED_MONITOR function block .................................................................................33
Speed Actual Comparators .......................................................................................34
Overspeed limit .........................................................................................................34
Speed Measurement Fault ........................................................................................34
Stall Protection..........................................................................................................34
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Torque Reference ................................................................................................................37
TORQ_REF_SELECTION function block ......................................................................37
Torque Reference Scaling.........................................................................................37
Load sharing in Master / Follower Application ...........................................................37
Output Limitation.......................................................................................................37
TORQUE/CURRENT_LIMITATION function block ........................................................37
Current Limitations ....................................................................................................37
Torque Limits ............................................................................................................38
Speed Dependant Current Limitation ........................................................................38
Gear Backlash Compensation...................................................................................39
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Current Control ....................................................................................................................42
TORQ_REF_HANDLING function block ........................................................................42
Torque Reference Selection......................................................................................42
Torque Step ..............................................................................................................43
Output Limitation and its Indication ...........................................................................43
CURRENT_CONTROL function block ...........................................................................43
Torque / Current Reference Selection.......................................................................43
Current Response Test .............................................................................................43
Regulation Blocking ..................................................................................................43
Armature Current Scaling..........................................................................................43
Current Reference Rise Time....................................................................................43
Current Reference Limitation ....................................................................................43
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DCS 500 Software Description
Contents
Current Difference Alarm.......................................................................................... 43
PI- Regulation .......................................................................................................... 44
Scaling of the gain KP .............................................................................................. 44
Scaling of the Time Constant KI ............................................................................... 44
Discontinuous Current Point..................................................................................... 44
Tuning of Current Regulator..................................................................................... 45
Firing Angle Limitation.............................................................................................. 45
Additional Commutation Reserve DXN..................................................................... 45
Example ................................................................................................................... 45
Network reactance ................................................................................................... 46
Short Circuit Current ................................................................................................ 46
400 A load................................................................................................................ 46
600 A load................................................................................................................ 46
DXN ......................................................................................................................... 46
Firing angle example ................................................................................................ 47
Note.
........................................................................................................................ 47
Status Indication for Bridge ...................................................................................... 47
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Field Excitation.................................................................................................................... 49
Selection of the Field Exciter .................................................................................... 50
Field Exciter Status .................................................................................................. 50
No Field Acknowledge Selected ............................................................................... 50
Internal Diode Field Exciter SDCS-FEX-1..................................................................... 50
Internal Field Exciter SDCS-FEX-2 ............................................................................... 51
Acknowledge............................................................................................................ 51
External Field Exciter DCF503-0050............................................................................. 51
External Field Exciter DCF504-0050............................................................................. 51
AI/DI Connected Field Exciters ..................................................................................... 51
Acknowledge Selection ............................................................................................ 51
Use of the Analog Input Channel.............................................................................. 52
Calculation Example................................................................................................. 52
Two Field Exciters at the same time ............................................................................. 52
Field Current Settings .............................................................................................. 52
Free Wheeling Function ........................................................................................... 53
Trigger Point Setting of the Free Feeling Function ................................................... 53
Filter for Actual Field Current ................................................................................... 53
Field Current Controller ................................................................................................ 54
Field Reversal............................................................................................................... 54
Activating ................................................................................................................. 55
Field direction change hysteresis ............................................................................. 55
Force field direction.................................................................................................. 55
Field monitoring when changing direction ................................................................ 55
Opti-Torque .................................................................................................................. 56
Selection of OPTI-TORQUE..................................................................................... 57
Field current reduction using torque reference ......................................................... 57
Field monitoring when OPTI-TORQUE changes the field direction .......................... 58
Field current / FLUX linearisation ............................................................................. 58
Saturation................................................................................................................. 59
Linearisation procedure............................................................................................ 59
Field reduction when at stand-still ............................................................................ 59
DCS 500 Software Description
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