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VACON® 1000
Operating Guide
Input
Power
Phase-shifted
transformer
Input
voltage
sensor
Illustration 28: Structure Diagram of the Control System
The main functions of the main control system include:
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Digital input and output
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Analog input and output
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PWM control signal generation of each power cell
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Encoding and decoding of the control signal
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System self-diagnosis
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Delivery of various implementation instructions
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Collection and handling of various failures
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Communication with external systems
To enhance the flexibility at the site application, a PLC is used for the logical processing of the internal switching signals, site opera-
tion signals, and status signals of the medium-voltage drive. The VACON® 1000 medium-voltage drive uses a high-quality PLC to:
•
Accomplish the input and output drive signal control
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Protection and interlocking
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External failure detection
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Communication with the main control system
•
Control of the human-machine interface
The HMI (Human-machine interface) is based on a high-definition liquid-crystal touch-type screen. It is easy to operate and is used
to set functional parameters, display and record the system status, operation status, and faults through the connection to the PLC.
See
7 Human-Machine
Interface.
32 | Danfoss A/S © 2021.06
Input current sensor
Power cells
24°
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12°
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0°
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-12°
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-24°
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Auxiliary winding
Motor
Output current sensor
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Optical
≈
fiber
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communication
Main
control
≈
system
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Output
voltage
sensor
Product Overview
4-20mA/0-10V
Analog signals
Digital signals
I/O
signals
RS485
User
PLC
RS485
end
RS485
HMI
AQ363633621020en-000201 / 172F3117
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