In order to meet high image quality requirements of the INO340 telescope, one of the significant issues is the design and
development of the Telescope Control System (TCS) architecture. The architecture of TCS is designed based on
distributed control system configuration, which consists of four major subsystems: Telescope Control System supervisor
(TCSS), Dome Control System (DCS), Mount Control System (MCS), and Active Optic System (AOS). Another system
which plays important role in the hardware architecture is Interlock System (ILS), which is responsible for safety of
staff, telescope and data. ILS architecture is also designed, using distributed system method based on the fail-safe PLCs.
All subsystems of TCS are designed with an adequate safety subsystem, which are responsible for the safety of the
subsystem and communicates through reliable lines with the main controller, placed in control room. In this paper, we
explain the innovative architecture of Telescope Control System together with Interlock System and in brief show the
interface control issues between different subsystems.