Programming
D-65
DC590+ Series DC Digital Drive
FIELD CONTROL
Parameter
Tag
Range
MIN FLD. CURRENT
179
0.00 to 100.00 %
Protects against motor overspeeding due to unintended excessive field weakening.
The field weakening loop reduces the field current to achieve speed control above base speed. At top speed the field reaches a minimum value. MIN
FIELD CURRENT should be set below this minimum value to allow reasonable margin for transient control near the top speed but not lower than
6% as this could then cause the "Field Fail" alarm to operate.
MAX VOLTS
178
0.00 to 100.00 %
Maximum volts is the back-emf voltage level at which field weakening begins. It is also known as "Spillover Bias". The default value is 100% of the
nominal value as set by the armature voltage calibration value. This value might be reduced due to the known IR drop included in the armature
voltage calibration value. Additionally for commissioning purposes, this value may be set to another (lower) desirable level, and subsequently
returned to the original value.
BEMF FBK LEAD
191
20 to 5000
This is the lead time constant of the back emf feedback filter which is used for reducing armature voltage overshoots when accelerating fast through
base speed with a default of 100 (ms).
Refer to Chapter 5: "Control Loops" for details of Tuning.
BEMF FBK LAG
192
20 to 5000
This is the lag time constant of the above feedback filter. If the filter is active, the ratio of lead / lag should always be greater than 1 to give an overall
lead action which reduces the voltage overshoot and less than, typically, 3 for stable control. The default values cancel each other and make the filter
inactive with a default of 100 (ms).
Refer to Chapter 5: "Control Loops" for details of Tuning.
FLD. QUENCH DELAY
185
0.0 to 600.0 s
If dynamic breaking is used the field must be maintained for a period after the drive is disabled until the motor reaches zero speed. The field quench
delay is the period of time that the field is maintained for when the drive is disabled.
FLD. QUENCH MODE
186
QUENCH / STANDBY
After the field quench delay has expired, the field can be entirely quenched or put into a standby mode at 50% of rated current or volts depending
whether in current or voltage control mode respectively. (The default standby value of 50% can be modified through the "SYSTEM / Reserved"
Menu which is primarily for factory use only and requires the “super” password.)
FIELD I THRESH
617
0.00 to 100.00 %
Threshold for UP TO FIELD diagnostic as a percentage of calibrated field current (see below).
FLD. CTRL MODE
209
See below
Selects between open-loop VOLTAGE CONTROL or closed-loop CURRENT CONTROL.
FLD. VOLTS RATIO
210
0.0 to 100.0 %
Sets the output dc field voltage as a percentage of the RMS FIELD supply voltage (line-to-line) when FLD CTRL MODE is set to VOLTAGE
CONTROL.
FIELD ENABLED
169
DISABLED / ENABLED
Refer to Chapter 6: "The Keypad" - The Keypad Menus (DIAGNOSTICS).
Summary of Contents for 590+ series
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Page 14: ...Cont 12...
Page 16: ...DC590 Series DC Digital Drive...
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Page 32: ...2 12 Product Overview DC590 Series DC Digital Drive...
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Page 130: ...3 96 Installing the Drive DC590 Series DC Digital Drive...
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Page 164: ...4 32 Operating the Drive DC590 Series DC Digital Drive...
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Page 174: ...5 8 Control Loops DC590 Series DC Digital Drive...
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Page 222: ...7 20 Trips and Fault Finding DC590 Series DC Digital Drive...
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Page 272: ...DC590 Series DC Digital Drive...
Page 288: ...B 16 Certification DC590 Series DC Digital Drive...
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Page 342: ...C 52 Parameter Specification Tables DC590 Series DC Digital Drive...
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Page 365: ...Programming D 21 DC590 Series DC Digital Drive Functional Description...
Page 494: ...D 150 Programming DC590 Series DC Digital Drive Programming Block Diagram Sheet 1...
Page 495: ...Programming D 151 DC590 Series DC Digital Drive Programming Block Diagram Sheet 2...
Page 496: ...D 152 Programming DC590 Series DC Digital Drive Programming Block Diagram Sheet 3...
Page 497: ...Programming D 153 DC590 Series DC Digital Drive Programming Block Diagram Sheet 4...
Page 502: ...D 158 Programming DC590 Series DC Digital Drive...
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Page 506: ...E 2 Technical Specifications DC590 Series DC Digital Drive...
Page 507: ...Technical Specifications E 3 DC590 Series DC Digital Drive...