CM (Coded Manual) Mode
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Erm, sure everyone have heard of this mode in the operations of our MRT trains right?
How it works? Does the TO need to hold his hand on the stick throughout the stretch that the train is travelling or he only needs to adjust when the train enters the CM mode zone?
Thanks. -
hmmm i think he does.... i know for sure that to operate the stick u have to push the black knob down...
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Hmm, the black knob, I also think that if the TO remove hand from the knob it will also brake to halt (safety mechanism) right?
And some more, when its raining heavily the TO will also stop the train and switch over to CM, but how does he do it, push the function lever over to CM or press emergency stop
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if the system is without ATP, it needs to run on RM (18km/h limit, motor stops at 16km/h). otherwise, CM or ATO will apply as long as ATP is active. when ATP is active, all track sections are coded with a speed limit and target speed (for next section).Originally posted by jetabt767400:Erm, sure everyone have heard of this mode in the operations of our MRT trains right?
How it works? Does the TO need to hold his hand on the stick throughout the stretch that the train is travelling or he only needs to adjust when the train enters the CM mode zone?
Thanks.
there is a toggle for changing modes between RM, CM and ATO, and this is changed on-the-fly.
if ATO is on non-raining days, the computer simply drives to the target speed for as far as possible and cruises, accelerating again if below target speed, until it reaches the braking point as calculated by the computer. ATP applies but communicates with the computer. the TO's role here is to open the doors, close the doors and press the two black buttons to release the brake and tell the computer it can move, and the computer will start the power, where u hear the multiple clicks automatically. each click represents a different power rating and rate of acceleration. if i'm not wrong, it represents 4 power ratings P1 to P4.
on raining days, TO's are required to manually drive the train under CM/ATP mode. the yellow sign and flashing yellow lights at the stations will inform the TO about this. -
the driver is holding the stick at neutral. below 4 are for power, above neutral is braking, top most is emergency brake. this is for japanese style, which shld be wat our systems run on too.
his left hand is holding onto a dead handle to keep his hands near the consoles? i always see it in tokyo. some drivers prefer to drive with two hands on the same stick. professionalism.
anyway, all trains i see there so far are manually driven, uses card access system where timetable will appear nicely on the electronic screen with 15-second accuracy. -
In order for the train officer to drive the train under CM, he has to use his hand and depress the dead man switch and move accordingly: P1 to P4 and B1 to B3 plus EM. If he let go his hand then the train will trip and stops immediately.Originally posted by jetabt767400:Erm, sure everyone have heard of this mode in the operations of our MRT trains right?
How it works? Does the TO need to hold his hand on the stick throughout the stretch that the train is travelling or he only needs to adjust when the train enters the CM mode zone?
Thanks. -
3 B's only ah? i always thought got 8 leh. phew.Originally posted by Manager433:In order for the train officer to drive the train under CM, he has to use his hand and depress the dead man switch and move accordingly: P1 to P4 and B1 to B3 plus EM. If he let go his hand then the train will trip and stops immediately. -
P4: Power 4
P3: Power 3
P2: Power 2
P1: Power 1
C: Coast
B1: Brake 1
B2: Brake 2
B3: Brake 3
EM: Emergency Brake -
If the TO faints with his hand on the handle, while on CMM. Does the train continue without stopping? Just wondering.Originally posted by Manager433:In order for the train officer to drive the train under CM, he has to use his hand and depress the dead man switch and move accordingly: P1 to P4 and B1 to B3 plus EM. If he let go his hand then the train will trip and stops immediately. -
try to use ATP or watever to override the track codes lor.Originally posted by VODKA KE0601:If the TO faints with his hand on the handle, while on CMM. Does the train continue without stopping? Just wondering. -
No way his hand still holding that handle if he faints.Originally posted by VODKA KE0601:If the TO faints with his hand on the handle, while on CMM. Does the train continue without stopping? Just wondering. Becuase in order to move that handle, one must apply some force ( by pressing down ) a round holder, known as deadman switch. Then u can move that handle up ( power ) or down ( braking ). At any moment if you let go that deadman switch, the whole system will trip resulting in the train comes to a stop. Not many train drivers likes to drives a train in CM unless raining coz its really tiring holding down that damn handle. If u r driving a train from Boon Lay all the way to Pasir Ris in CM die lah. -
Luckily if it's due to rain, still can take a break between Tiong Bahru and Lavender.Originally posted by Manager433:If u r driving a train from Boon Lay all the way to Pasir Ris in CM die lah. -
Haha, thanks guys, really cool explaination, but is it possible to use CM on dry days, when the ATP and auto systems are on?
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Upz, thanks for the knowledge, guys.Originally posted by jetabt767400:Haha, thanks guys, really cool explaination, but is it possible to use CM on dry days, when the ATP and auto systems are on?
It's possible, in cases of a station overun/underrun, the TO have to switch to CMM or RMM (Restricted Manual Mode) and guide the train into position. If the TO continue in CMM past a red-signal, they lose protection from the ATP, and the mode of operation would automatically switched to RMM (IIRC). -
Just googled a document yesterday, titled "ERTMS adhesion management:
Review of ATP, ATO and ERTMS". Lots of infos for this thread, will post the link after work.
Or if you have the link, do post it. Thanks. -
If over run, lets say if the distance ish more than the permitted distance, then the train cannot reverse liao. Must proceed to the next station. Sorry, cannot disclose the info.Originally posted by VODKA KE0601:Upz, thanks for the knowledge, guys.
It's possible, in cases of a station overun/underrun, the TO have to switch to CMM or RMM (Restricted Manual Mode) and guide the train into position. If the TO continue in CMM past a red-signal, they lose protection from the ATP, and the mode of operation would automatically switched to RMM (IIRC). -
Not true wor.Originally posted by ^tamago^:Luckily if it's due to rain, still can take a break between Tiong Bahru and Lavender. -
But usually they dun drive in "rainy mode" once past tiong bahru or braking at outram park leh.... sometimes even have to drive in "faster mode".Originally posted by Manager433:Not true wor. -
Faster mode doesnt mean the driver ish driving in auto mode. Coz if raining even in tunnel, train still move under CM for some reasons.Originally posted by ^tamago^:But usually they dun drive in "rainy mode" once past tiong bahru or braking at outram park leh.... sometimes even have to drive in "faster mode". -
IsIt related to the "set-back limit" plate by the rails, why so secretive? Say lah.Originally posted by Manager433:If over run, lets say if the distance ish more than the permitted distance, then the train cannot reverse liao. Must proceed to the next station. Sorry, cannot disclose the info. 
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Double Post, opps.
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Doesn't that mean if it rained the whole day, they have to press that dead man's switch for the whole time?Originally posted by Manager433:Faster mode doesnt mean the driver ish driving in auto mode. Coz if raining even in tunnel, train still move under CM for some reasons.
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think i encounter before.Originally posted by Manager433:If over run, lets say if the distance ish more than the permitted distance, then the train cannot reverse liao. Must proceed to the next station. Sorry, cannot disclose the info.
this fact was also mentioned during the last last depot open house 10 yrs ago~ -
Originally posted by ^tamago^:Doesn't that mean if it rained the whole day, they have to press that dead man's switch for the whole time? Arbo then?
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If i'm the TO, would probably use something to hold-down the deadman-switch, there's no surveillance in the driver's cabin, right? I meant sometimes i see them reading "the newpaper" or playing with their personal belongings.Originally posted by Manager433: Arbo then?