Akademik Veri Yönetim Sistemi
Otomatik Kontrol Ulusal Kongresi – TOK 2021, Van, Türkiye, 2 - 04 Eylül 2021, ss.1-6
In this study, a centralized automatic block controller that ensures fail-safe interlocking in open line and between the exit routes facing each other of two neighbouring stations are developed for fixed block signalling systems. In this way, a protected track form is created that ensures protection against following and opposing movements across the open line. State transition diagrams are used as the modelling method, since fixed block signalling systems have similar characteristics as mutually discrete event systems (DES), and since this method is recommended in the IEC 61508-3 and EN 50128 standards. Diversely, existing studies in the literature, the logical equalities obtained in the state transition diagrams are converted to PASCAL language-based, high level SCL language PLC code, which is also quite recommended for SIL 4 in the aforementioned standards. In conclusion, the block controller is verified with the TIA Portal and PLCSIM.
In this study, a centralized automatic block controller that ensures fail-safe interlocking in open line and between the exit routes facing each other of two neighbouring stations are developed for fixed block signalling systems. In this way, a protected track form is created that ensures protection against following and opposing movements across the open line. State transition diagrams are used as the modelling method, since fixed block signalling systems have similar characteristics as mutually discrete event systems (DES), and since this method is recommended in the IEC 61508-3 and EN 50128 standards. Diversely, existing studies in the literature, the logical equalities obtained in the state transition diagrams are converted to PASCAL language-based, high level SCL language PLC code, which is also quite recommended for SIL 4 in the aforementioned standards. In conclusion, the block controller is verified with the TIA Portal and PLCSIM.