Page 16
StEin
Stationary Equipment Module
The overcurrent and short circuit handling of the StEin track sections
The 8 track section outputs of the StEin can take on different states individually, which are repre-
sented by the LEDs next to the clamps, but are also sent to controllers and computer (interlocking
program), to see the states and be able to take actions (e.g. restart).
See next page for graphic of display of track output states on the StEin itself.
The displays on controller and interlocking program are similar, but not completely identical and syn-
chronous, because the data traffic shall not overload CAN bus and radio.
1. As long as there is NO overcurrent or short circuit situation, one of two states is valid:
Normal operation-free
(whereby one of the HLU steps H, UH, U, LU, L, FL, F, A is set) or
Normal operation-occupied
(whereby one of the HLU steps H, UH, U, LU, L, FL, F, A is set).
2.
Overcurrent - slow
(threshold UESLAMP) or
overcurrent - fast
(UESSAMP): this is
NO short circuit, therefore NO immediate shutdown, but switch-off after defined switch-off time, after-
wards automatic restart according to parameter UESLAZT, UESLEZT, etc.
Track section states (the module reports) in this situation:
UES temporarily
, i.e. UESL is detected and therefore switched on and off periodically,
or
UES temporarily
, i.e. UESS is detected and therefore switched on and off periodically.
LEDs on the StEin:
blue
LED flickers (=flashed rapidly)
,
yellow
LED (occupancy) does not change.
3. The track section is turned off once the shutdown period has elapsed (parameters UESLAZT or
UESSAZT) and a reset is awaited (after the reset-time has elapsed, that is the parameter UESLEZT or
UESSEZT).
Track section states in this situation as above (report is the same), therefore still:
UESL-temporarily
, ...
or
UESS-temporarily
, ...
LEDs on the StEin:
blue
LED steady light
,
yellow
LED (occupancy) does not change.
4. After the reset-time has elapsed (UESLEZT or UESSEZT), power to the track section is restored and -
in case overcurrent is still present - again (as above) the shutdown is awaited after the switch-off time
has ended (i.e. parameter UESLAZT or UESSAZT):
Track section states in this situation as above (report is the same), therefore still:
UESL-temporarily, ...
UESS-temporarily
, ...
LEDs on the StEin:
blue
LED flickers
,
yellow
LED (occupancy) does not change
(like in 3.)
5. Depending on the number of reset attempts (parameters UESLEAZ or UESSEAZ), the above process
is repeated, i.e. track section states (the module reports) in this situation:
6.
UESL-temporarily, ...
UESS-temporarily
, ...
LEDs on the StEin:
blue
LED flickers
, combined with
steady light)
yellow
LED (occupancy) does not
change.
7. After the last power turn-off (when the power will not be restored again because the number according
to UESSEZT or UESLEZT was reached):
Track section states in this situation as above (report is the same), therefore still:
UESL switched off,
because UESL requirement was still present after all restarts,
or
UESS switched off,
because UESS requirement was still present after all restarts.
LEDs on the StEin output:
blue
LED steady light,
yellow
LED flashes 1 Hz (UESL) or 2 Hz (UESS).
8. If a track section (from state UESL or UESS) is restarted manually, which can be done from the buttons
on the StEin, the controller or the interlocking program, the section enters normal operation, except
when overcurrent or short circuit is detected again immediately; in the latter: procedure as described
above.
Short circuit
(threshold KUSAMP):
this is a “real” short circuit, in which case an immediate shut-down is essential, due to jeopardizing ve-
hicles and track material (and if set to 8A also the module itself is in danger); therefore, there is NO ad-
justable turn-off time; the number of restart attempts is also fixed, namely 50 (in the current software);
there is only an adjustable restart time (parameter KUSEZT), independently, first, 10 fast restart at-
tempts are made (intervals of 100 ms each for small frog contacts, etc.) and then the further ones after
the intervals set in KUSEZT, whereby the restart attempts decrease, because the intervals enlarge bit
by bit, at the last 50 attempts to approximately the 3-fold value. With the value in KUSEZT, also results
in the time until the final shutdown; e.g. with a typical value of KUSEZT = 1000 ms, the final shutdown
time is about 2½ min.
Track section states (the module reports) during these 25 restart attempts:
KS temporarily occupied
, i.e. short circuit was detected at every restart attempt.
LEDs on the StEin output:
blue
LED flashes in accordance with the restart attempts
,
yellow
LED (oc-
cupancy) does not change: steady light.
After 50 failed restart attempts, whereafter there is no automatic restart; i.e. after the final shutdown:
KS turned-off display status occupied
, after all restart attempts have failed.
Note: the term “display status occupied” (instead of “occupied”) means that “occupied” is only presumed,
but due to a lack of power in the section, it cannot be verified.
LEDs on the StEin output:
blue
LED steady light,
yellow
LED flashes fast 5 Hz.
9. If a track section (from state KS turned-off) is restarted manually, which can be done from the buttons
on the StEin, the controller or the interlocking program, the section enters normal operation, except
when overcurrent or short circuit is detected again immediately; in the latter: procedure as described
above.
NOTE (for normal operation NOT relevant) to possible track section states which are NOT explained
above, but could be:
Running voltage off-display state free:
Track section is completely powerless (but NOT HLU step A,
where there are no impulses for occupancy detection); only in special situations like missing synchronisa-
tion.
Detectable on the StEin oputput: turned-off or anomalous HLU-LED
Running voltage off-display state occupied:
Track section is completely powerless (but NOT HLU step
A, where there are no impulses for occupancy detection); only in special situations like missing synchroni-
sation
Detectable on the StEin oputput: turned-off or anomalous HLU-LED
UESL turned-off display state free,
UESS turned-off display state free,
KS turned-off display state free:
practically no or small difference to the actual state
“xxx turned-off display state free”; although it could be practical because of interlocking logic.
