The four conditions taken up for simulation are as follows:
SIMULATION-1: E M U through up main line. All signals working in Automatic mode.
When train has not occupied the track and the whole path (up track is set)
Train arrives and occupies
A 509 T.
Train crosses S/A 507 and occupies A507 T.
Train crosses the overlap of S/A 507 and occupies 502 T (arrives at pl. No. 2)
S/A 507,S 12, &
A 509 T to
S/A 505 - clear
A 505 T set
S/A 507,S 12 & S/A 505 - clear S/A 507 - danger
S/A 507 danger
A 509 T occupied
A 509 T blank A 507 T occupied. Track up to A507 T set
Train crosses S12 and occupies 12 T and 101 T.
Train crosses the overlap of S12 and occupies 12 A
T Train occupies A505T
Train crosses the overlap of S/A 505
S-12 danger S/A -507 danger S-12 danger, S/A 507 caution
S12 danger , S/A 507 caution
S/A 505 – danger (red aspect) S-12 caution, S/A 507 attention
Track up to 101 T set.12 AT blank Track up to 101 T set.12AT occupied A507 T – 101T set, 12 AT blank, A505 T occupied. All the track from S/A 509T – S/A 505 T set