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2001 Layout Route CT's
#11
(16-09-2010, 10:54 AM)merlin89 Wrote: Phew thanks for that Peter I really appreciate your help maybe Im getting somewhere with this after all.

Yes, you had actually worked it out for yourself- don't panic!
Getting to the time now that time is best spent just giving yourself confidence of what you know and making sure that you are physically organised for attending exam, knowing candidate number, times and travel details etc. People have been known to fail just by getting themselves too het up and going into "headless chicken" mode
PJW
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#12
Hello PJW,
I have just finished the Points CT's for 2001 layout and i'd like to ask , whenever you'll have time of course, if you please can have a look at them and advise any errors i may have.
Thank you!

And next batch of Points CT's


Attached Files
.doc   Point-200-Control_Table-LAYOUT 2001.doc (Size: 38.5 KB / Downloads: 11)
.doc   Point-201-Control_Table-LAYOUT 2001.doc (Size: 41 KB / Downloads: 9)
.doc   Point-202-Control_Table-LAYOUT 2001.doc (Size: 39 KB / Downloads: 10)
.doc   Point-203-Control_Table-LAYOUT 2001.doc (Size: 39.5 KB / Downloads: 8)
.doc   Point-204-Control_Table-LAYOUT 2001.doc (Size: 41 KB / Downloads: 9)
.doc   Point-205-Control_Table-LAYOUT 2001.doc (Size: 42 KB / Downloads: 8)
.doc   Point-206-Control_Table-LAYOUT 2001.doc (Size: 42.5 KB / Downloads: 8)
.doc   Point-207-Control_Table-LAYOUT 2001.doc (Size: 42.5 KB / Downloads: 8)
.doc   Point-208-Control_Table-LAYOUT 2001.doc (Size: 41.5 KB / Downloads: 8)
.doc   Point-209-Control_Table-LAYOUT 2001.doc (Size: 40 KB / Downloads: 8)
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#13
(19-10-2010, 06:19 AM)ivanutd Wrote: Hello PJW,
I have just finished the Points CT's for 2001 layout and i'd like to ask , whenever you'll have time of course, if you please can have a look at them and advise any errors i may have.
Thank you!

And next batch of Points CT's

Just about to go on IRSE Convention, so I will not be able to respond until I get back; plenty of time before next years exams fortunately!
PJW
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#14
(19-10-2010, 07:51 AM)PJW Wrote:
(19-10-2010, 06:19 AM)ivanutd Wrote: Hello PJW,
I have just finished the Points CT's for 2001 layout and i'd like to ask , whenever you'll have time of course, if you please can have a look at them and advise any errors i may have.
Thank you!

And next batch of Points CT's

Just about to go on IRSE Convention, so I will not be able to respond until I get back; plenty of time before next years exams fortunately!

Finally looked at the points CTs.
Generally pretty good.
I have amended and put comments in where I think it may reflect a ack of understanding rather than a silly mistake, but occasionally aso added a hint in those cases re how to try to avoid.
Feel free to query and aask anything specific that arises.


Attached Files
.doc   Point-201-Control_Table-LAYOUT_2001.doc (Size: 48 KB / Downloads: 12)
.doc   Point-202-Control_Table-LAYOUT_2001.doc (Size: 48 KB / Downloads: 9)
.doc   Point-203-Control_Table-LAYOUT_2001.doc (Size: 44 KB / Downloads: 10)
.doc   Point-204-Control_Table-LAYOUT_2001.doc (Size: 46.5 KB / Downloads: 9)
.doc   Point-205-Control_Table-LAYOUT_2001.doc (Size: 49 KB / Downloads: 8)
PJW
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#15
(09-11-2010, 09:01 AM)PJW Wrote: And next batch of Points CT's



Attached Files
.doc   Point-206-Control_Table-LAYOUT_2001.doc (Size: 50 KB / Downloads: 10)
.doc   Point-207-Control_Table-LAYOUT_2001.doc (Size: 47.5 KB / Downloads: 9)
.doc   Point-208-Control_Table-LAYOUT_2001.doc (Size: 46.5 KB / Downloads: 8)
.doc   Point-209-Control_Table-LAYOUT_2001.doc (Size: 43.5 KB / Downloads: 10)
.doc   Point-200-Control_Table-LAYOUT_2001.doc (Size: 45 KB / Downloads: 9)
PJW
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#16
PJW,
Thank you so much for taking your time and go through CT's and writing comments on them! Many thanks!
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#17
(10-11-2010, 04:34 AM)ivanutd Wrote: PJW,
Thank you so much for taking your time and go through CT's and writing comments on them! Many thanks!

Seem to have failed to post 200; I'll go back and add.
Also still to look at route tables
PJW
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#18
Route tables will follow shortly, i just have to fill them all in a word document.
Thank you!
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#19
(24-07-2010, 10:27 PM)PJW Wrote:
(22-07-2010, 11:47 AM)merlin89 Wrote: Points added

Note that in the actual exam, the question asked for points 203 and 207.  It is excellent to do extra ones when practicing; not a good idea in the exam itself!

Blank CT
I think the blank works well bit I think that the Set by routes could have been 3 wide rather than 4 and the extra width better allocated to the sectional route locking tracks clear column.

Also think that the Time of Operation locking takes up space and is rarely needed; hence I'd have used this space within the CALLED R to N and just have written in long hand if it happened to be neede in the Notes.  Most unlikely to get 2 points both with T of Op in the same exam so no saving of time by photocopying the blank on this bit.

Also feel it is reasonableto put the point numnber above the grid frame after the question number entry in the centre of the page at the top, written large.

203
You missed the flank to the Up Fast: 102A(M), 108A(M), 110A(M) that I would hae expected.

For 303 A(S) and B(S), I think you forgot which points you were doing because you show EB and EB DB; similarly 301B(S) and C(S)


207
You missed the A routes from 108, 110.
I always think it is a good idea that once you have found a signal which calls points
a) to look at the route box for that signal and check each and every route- whether it should call N, call R, or not call at all.  Doesn't take long and helps prevent you missing one, particularly if M/W/C etc
b) check every parallel signal in case there are routes from these as well which also should call the points; another cross-check

It does depend a bit on the technology of the interlocking but best that where there is locking on points within an overlap then the occupied track should only bypass the locking on that track and any other which may feasibly be occupied by the train when stationary.  A train waiting at 109 would have cleared AG so this locking should be "outside the bracket".  A train waiting at 108 could well be on BM and BN, but not on BP I think, so BP should be  "outside the bracket".
You have included within the sectional locking entries the overlap tracks- you don't need the one which deadlocks the points but you are correct that the other(s) should be listed.
So route locking after 107A(M) should have been
AJ, AG [AH ---or AH occ for 30s]
Actually I think the time is abit short for a 400m track, but it is of the right order of magnitude so don't worry too much about that.  Similarly I am only picking you up on detail of the overlap locking presentation because the rest of the CT is ok; the really important thing is that the locking is shown, the precise detail is a bit of a nicety.

You included too many tracks after routes 310A(S) and B(S); a good tip is always to compare the last track with the one you wrote in the dead-locking column- be very suspicious if they don't match.  Obviously for a crossover being locked normal the route locking will only feature one or other of the dead tracks, whereas for a crossover reverse it will list both.  Also useful when there is a foul track or a conditionally foul track; acts as a cross-check that you have written it correctly.


206
You missed 305 A/B/C(S) for some reason; thi was a shame when you had caught those routes reading over 205 Reverse as needing to call 206 Normal, firstly to get a bit of flank and secondly to avoid locking 206 the wrong way by DE and thus preventing use of the Up Fast for no good reason.

You attemptd to show some swinging overlap, counter-conditional locking.  You very nearly got it right; the only problem being that there isn't any!  
The first hinge is 205 and 206 is the second hinge beyond 111.  
Thus as far as 206 are concerned, in either of its overlaps then 205 must already be Normal and it is a simple swinging overlap with track DE in both of them and BJ as the additional track when 206R; however BJ deadlocks 206 and therefore there is no need for any additional locking.
If you had been doing 205's CT instead: then for 205 to go R at a time when 206 was R (assuming that this is a feasible status- i.e. not prevented by point-to-point) then
205 would need [(BJ or 205N) or routes to 111 normal] and this indeed would have been presented in very much the manner you used.  It is pretty unusual for a point to have counter-conditions both N to R and R to N so be a little suspicious of writing that; however it does occur, but for obvious reasons the actual conditions will be slightly different and so at first glance (before looking at the layout) your presentation looked perfectly feasible.

Thanks for your reply, about point 203, as using control table 2011 from IRSE, if I put EA, (BD or 201R) in "Train Detection Clear" for "Normal to Reverse", could this help with flank protection problem of 108B(M), 110B(M) and 102A(M)?


Attached Files
.pdf   Point 203 control table.pdf (Size: 403.02 KB / Downloads: 2)
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