Alstom SHPM 101 - Flowchart of Sequence Comparator

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 33 of 71
Figure 34: Flowchart of sequence comparator
Yes
Read inputs
Is reset input
high
Has A or B
changed state
Has input A
changed
Does A=B
Does B=A
Reset all registers
and output
Finish timer
A1
A2
A3
A4
Yes
No
start
Is selfcheck
input high
No
No
No
Yes
Yes
Yes
Yes
No
No
Fig 34 A
Fig 34 A
Fig 34 A
Fig 34 A