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| TUP011 |
Software for Supervisory Control of the Trim Coil Power Supplies of the Kolkata Superconducting Cyclotron
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1 |
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- B. Sarkar, S. Bandyopadhyay, C. Datta, D. Sarkar
DAE/VECC, Calcutta
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The K-500 Superconducting Cyclotron at Kolkata has 18 trim coils. Each of these coils is energized to a different level using a current-regulated precision power supply to produce the desired magnetic field profile for proper beam dynamics. Supervisory software, with elaborate GUI, has been developed for remote operation and monitoring of the power supplies. It has also been interfaced with four current-setting knobs on the control console to provide the operators with a facility of "analog tuning" in a digital setup. Each of these knobs may be assigned to a power supply on-the-fly and the setting of the power supply changed by turning it. Provision also exists to invert the polarity of a power supply using GUI. The software can be operated in two modes: one, in which, the power supplies are operated independently; and the other, in which, as many as three power supplies may be grouped together, to bring about equal changes in current settings of the grouped power supplies simultaneously using keyboard-mouse combination and/or a knob. The power supplies, having RS-485 interface, are operated and monitored over the control network using Ethernet-to-Serial (RS-485) data converter.
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| WEP024 |
Development of Microcontroller-based Computer Interface Board and Local Display Unit for Steering Magnet Power Supplies
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1 |
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- K. Datta, S. Bandyopadhyay, C. Datta, D. Sarkar
DAE/VECC, Calcutta
- S. Bhagwat
BARC, Mumbai
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A microcontroller-based computer interface board and a local display unit have been designed and developed to monitor and control the power supplies from local panel as well as from the remote console. The main objective of this development is to provide support for the computer control of the indigenously developed bipolar X-Y steering magnet power supplies for the injection line of the K=500 Super Conducting Cyclotron at VECC, Kolkata. The interface board is designed around an Intel 8051 microcontroller which is programmed with firmware of different tasks like setting the current of the power supply through 12-bit DAC, reading the output current of the power supply through 12-bit ADC and communicating with remote computer through an optically isolated RS 485 port following a customized command-response protocol. This facilitates the operation of 12 number of power supplies connected in a multi-drop fashion from a remote centralised control panel. Through the local front panel, a user can set the current of the power supply, monitor the output current and the status of the power supply.
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