09-06-2008, 10:27 AM
Thankyou.
I agree with the points that you present. If we are taking regard of the onerous nature of the SMTH necessary after failure then I feel that the solution originally offered was best.
Thinking about the triple ended set, it's long time to get back into service problem could be mitigated against by having split detection on each end, which would result in one set of control logic out, & separate detection on the way in.
Another note, might it be a good idea to mention the type of interlocking which this is being designed for?
Relay Interlocking, the aim is to reduce the number of control lines (cores) while still being safe and meeting the customer specification.
CBI, depends on application but may force you to have single ends (Ansaldo ACC)
SSI is only capable of 2 points identities per module, and so would prefer points to be paired where possible to reduce the impact on the interlocking. ie less point modules.
I agree with the points that you present. If we are taking regard of the onerous nature of the SMTH necessary after failure then I feel that the solution originally offered was best.
Thinking about the triple ended set, it's long time to get back into service problem could be mitigated against by having split detection on each end, which would result in one set of control logic out, & separate detection on the way in.
Another note, might it be a good idea to mention the type of interlocking which this is being designed for?
Relay Interlocking, the aim is to reduce the number of control lines (cores) while still being safe and meeting the customer specification.
CBI, depends on application but may force you to have single ends (Ansaldo ACC)
SSI is only capable of 2 points identities per module, and so would prefer points to be paired where possible to reduce the impact on the interlocking. ie less point modules.