MS - SOUND decoders MS440 to MS990 and MN - NON-SOUND decoders MN170 to MN340 Page 43
Servo outputs:
Protocol
and alternate
Use of
Servo outputs:
3 & 4
as SUSI pins
0 - 3
Note:
For
Smart
Servo
RC-1
set
CV #161
= 2!
Bit 0 = 0: Servo protocol with positive pulses.
= 1: Servo protocol with negative pulses.
Bit 1 = 0: Control wire only active during movement
= 1: ... always active (draws current,
judders sometimes but holds the position
also at mechanical load);
Bit 2 = 0: For two-key operation (as per CV #181, ...)
with center position, if none of the two keys is activated.
= 1: For two-key operation (as per CV #181, ...),
where the servo runs only as long as function
keys are active.
Servo 1
Left position
Right stop
Center position
Rotating speed
49= 1 ms
Servo
pulse
205
127
30 = 3 sec
End positions and center position define the portion of
the total rotation range of the servo to be used (typ. ap-
prox. 270°).
"left", "right" are to be understood symbolically; actual
effect can also be exactly the opposite.
Speed of the actuating movement: Time between the
defined end positions in tenths of a sec (i.e. range up to
25 sec, default 3 sec).
#166
- #169
#170
- #173
#174
- #177
Same as above,
but for:
servo 2
servo 3
servo 4
Panto
Reverberation
as of SW version 4.210
Valid for each servo, which is valid as "Panto..." under
CVs #181 - #184 (function assignments) = 94 - 97),
After reaching the final position (i.e. after "Panto lift")
the panto should move slightly up and down a few more
times. CV #178 sets the amplitude of this oscillation
(more precisely the first one)
= 0: no oscillation
= 50: sensible initial setting, vary from there.
Servo 1
Servo 2
Servo 3
Servo 4
Function assignm.
NOTE:
If a servo control line
shares its connection
with another function
(e.g. SUSI or input)
for optional use, a
value >0 in CV #181,
#182, ... means
switching to servo
control line.
This concerns with
"small" decoders
(track N ... H0) the
"official" SUSI pins,
which are switched to
0 - 28
90 – 97*
101-114
201-208
* Not im-
ple-
mented
yet!
= 0: Servo not in operation
= 1: Single-key operation with F1
= 2: Single-key operation with F2
and so on..
= 28: Single-key operation with F28
= 90: servo dependent on loco direction
forward = servo left; reverse = servo right
= 91: servo dependent on loco direction and standstill
i.e. servo on the right at standstill and direction
forward, otherwise servo on the left
= 92: servo dependent on loco direction and standstill
i.e. servo on the right at standstill and direction
backwards, otherwise servo on the left
= 93: servo dependent on standstill or cruising
i.e. servo on the right at standstill, servo on the left
at cruising; direction without effect.
= 94: refers to function "Panto1" which is
configured in CV #186.
= 95: …"Panto2" configured in CV #187
= 96: …"Panto3" configured in CV #188
= 97: …"Panto4" configured in CV #189
servo with CVs #181,
#182 (SUSI no longer
available), with
MS950, MS955 ser-
vos 3 + 4, with
MS990 7 + 8.
= 101: Two-key operation F1 + F2
= 102: Two-key operation F2 + F3
and so on..
= 111: Two-key operation F11 + F12
= 112: Two-key operation F3 + F6
= 113: Two-key operation F4 + F7
= 114: Two-key operation F5 + F8
(Two-key mode as defined with CV #161, Bit 2)
= 201 - 208: Events 1 - 8 from scripts or sound
Special assignment
for live steam en-
gines
NOT implemented in
MS decoders until
further notice
(CV reserved for po-
tential need)
= 1: Steam loco with one servo in operation;
speed and direction of travel defined by
slider, center position means stop.
= 2: Servo 1 proportional on speed regulator
Servo 2 for direction.
= 3: like 2, however: Direction-servo is automatically in
“neutral” if speed is 0 and F1 = ON;
At speed step > 0: if direction-servo is engaged.
NOTE to CV #185 = 2 or 3:
Servo 1 is adjustable with CV #162, #163 (end-
positions), by using the corresponding values, it is
also possible to change the direction.
Servo 2 is adjustable with CV #166, #167.
"Panto1"
"Panto2"
"Panto3"
"Panto4"
Bit 7 = 0: Not sound-dependent
= 1: Sound-dependent
Bit 6 - 5 = 00: direction independent,
= 01: only if loco drives forward
= 10: only if loco drives backwards
= 11: only if F-key is turned off
Bit 4 - 0: to Activate
00001 = F1 00010 = F2 00011 = F3, …
Alternative (clearer,
preferred for new pro-
jects) "SUSI" usage.
= 11: SUSI pins as logic level outputs (see above)
= 22: SUSI pins as logic level ("reed") inputs
= 33: SUSI pins as servo control lines
= 44: SUSI pins as "SUSI pins" (same as 0)
= 55: SUSI pins as I2C bus.
IMPORTANT NOTE for connecting the servos to " non-large scale" decoders
The possibility to connect servo control lines is a secondary function of the "SUSI" pins (to be activated
by CVs #181, #182). These work with a voltage level of 3.3 V (difference to MX decoders where the
SUSI pins (and therefore also the control lines) work with 5 V).
Some servos do NOT work with 3.3 V! The technical data of the servos usually do NOT show this
restriction!
Possible remedy for non-function: lower supply voltage (normally 5 V) to about 4 V; otherwise only ex-
change helps; better are digital servos (avoid also jerks at the beginning etc.)
Decoders with more than 4 (i.e. 5 to 8) servo control lines (e.g. MS990)
CV-Page 145, CVs #262 - #284 are available for the servo control lines 5 - 8. It is insignificant
whether complete servo connections are involved (e.g. a total of 6 servo connections on the MS990) or
individual servo control lines, for example as a secondary function of SUSI pins.
CVs (from sw version 4.90)
Select page: CV #32 = 145
CV-Page 145 > CVs #262 - #277,
#281 - #284
For large scale decoder, if more than 4 servos can be operated:
Identical meaning as CV page 0 (main page), CVs #162 - #177 resp. #181 -
#184, but for servo control lines 5 to 8 (instead of 1 to 4)
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