The Central Bureau Investigation (CBI) interrogated a director of the city-based RP Info Systems in connection with a Rs 515.15-crore fraud on a consortium of 10 banks, an official said on Monday.The agency booked the company which was involved in manufacturing and trading of computers in the name "Chirag" brand, after the state-run Canara Bank had lodged a complaint with the investigation agency."Shivaji Panja, one of the directors of RP Info SystemS, was interrogated on Monday," CBI spokesperson said.Canara Bank alleged that the directors of the company -- Shivaji Panja, Kaustuv Ray and Vinay Bafna -- and its Vice President (Finance) Debnath Pal cheated the Banglaore-based lender and nine other consortium member banks to the tune of Rs 515.15 crore.The lender also alleged that the company had availed bank loans -- which have become non-performing assets (NPAs) now -- from 2012 onwards by submitting fabricated statements.The other banks constituting the consortium were the State Bank of India, State Bank of Bikaner and Jaipur, State Bank of Patiala (both now part of the SBI), Union Bank of India, Allahabad Bank, Oriental Bank of Commerce, Central Bank of India, Punjab National Bank and the Federal Bank.