Motor Regulation - ZIMO MX638 Series Instruction Manual

Non-Sound Decoder MX600 - MX638 and Sound Decoder MX640 - MX659
track voltage collapses when the decoder (motor) starts to draw power which, in the worst case, may
lead to intermittent performance.
There are some adjustment possibilities for analog operation where motor control and function out-
puts are concerned; these CV's can of course be read-out or programmed only with a DCC system or
other programming device.
CV Denomination Range
Basic Configuration
#29 0 - 63
0000 1
Analog functions
#13 0 - 255
F1...F8
Analog functions
F0 v&r, F9 – F12,
#14 Analog momentum 0 - 255
and
Regulated Analog
Note: Actual decoder settings may differ from the default values if a sound project is on the decoder; in particular,
the motor regulation (CV #14, Bit 7) is often enabled. The regulation only works well with power packs that apply
"clean" DC voltage (i.e. with an LGB 50 080); otherwise it is better to turn the motor regulation off.
Default Description
Bit 0 - Train direction:
0 = normal, 1 = reversed
Bit 1 - Number of speed steps:
0 = 14, 1 = 28
Bit 2 – Automatic DC operation (analog): *)
0 = disabled 1 = enabled
14 =
Bit 3 - RailCom („bidirectional communication")
1
10
0 = deactivated 1 = activated
Bit 4 - Individual speed table:
Bit 2 = 1
0 = off, CV # 2, 5 and 6 are active.
(enables 1 = on, according to CV 's # 67 – 94
analog op-
Bit 5 - Decoder address selection:
eration)
0 = short address as per CV #1
1 = long address as per CV #17+18
Defines functions that should be "ON" in analog mode.
Bit 0 = 0: F1 is OFF in analog mode
= 1: ...ON in analog mode
Bit 1 = 0: F2 is OFF in analog mode
0 Bit 1 = 1: ...ON in analog mode
...........F3, F4, F5, F6, F7
Bit 7 = 0: F8 is OFF in analog mode
Bit 7 = 1: ...ON in analog mode
Defines function outputs that should be "ON" in analog
mode.
Bit 0 = 0: F0 (forw) is OFF in analog mode
= 1: ...ON in analog mode
Bit 1 = 0: F0 (rev) is OFF in analog mode
Bit 1 = 1: ...ON in analog mode
Bit 2 = 0: F9 is OFF in analog mode
Bit 2 = 1: ...ON in analog mode
64
(equals
------------F10, F11, F12
Bit 6 = 1)
Bit 6 = 0: Analog operation with acceleration and
deceleration according to CV #3 and #4,
especially useful for sound
Bit 6 = 1: Analog operation without acceleration and
deceleration according to CV #3 and #4.
Bit 7 = 0: unregulated DC operation
Bit 7 = 1: regulated DC operation
3.6

Motor Regulation

The speed curve
There are two types of speed curves, which are selected with
CV #29, Bit 4 = 0
... = 1
3-point speed table: the lowest, highest and medium speed is defined by the Configuration Variables
#2 (Vstart), #5 (Vhigh) and #6 (Vmid) (=external speed step defined by slider position). This is a sim-
ple way to quickly establish a speed range and its curvature.

The three-step curve is usually sufficient.
28-point speed table (a.k.a. "free programmable speed table"): with the help of CV's #67 - 94, all 28
external speed steps can be freely assigned to the 128 internal speed steps. These 28 CV's apply to
all speed step modes (14, 28 and 128). If 128 external speed steps are used, the decoder adds the
missing intermediate values by interpolation.
250 250
240 240
230 230
220
220
210 210
200 200
190 190
180 180
170 170
160
160
External speed step
150 150
140 140
130 130
120
120
110 110
100 100
Slightly bent
90 90
(default) characterisitc
80 80
70
Vmid = 1 (equals 85) 70
60 60
Vstart = 2
50 50
Clipped linear speed curve
Vhigh = 1
40 40
Vstart = 10, Vhigh = 165,
30
(equals 252) 30
20 20 Vmid = 90
10 Center 10
0 0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
0 9 18 27 36 45 54 63 72 81 90 99 108 117 1 26 0 9 18 27 36 45 54 63 72 81 90 99 108 117 1
CV Denomination Range
Start Voltage
Vstart
#2 1 - 255
with 3-point table if
CV #29, Bit 4 = 0
Top Speed
Vhigh
#5 0 - 255
with 3-step curve if
CV #29, Bit 4 = 0
Page 17
: 3-step curve (defined by 3 CV's)
: 28-step curve (defined by 28 CV's)
250 250
240 240
230 230
220 220
210 210
200 200
190 190
180 180
170 170
160 160
150 150
140 140
130 130
120 120
110 110
100 100
90 90
80 80
70 70
60 60
50 50
40 40
30 Clipped and bent speed curve 30
20 20
Vstart = 15, Vhigh = 180, Vmid = 60
10 10
0 0
20 21 22 23 24 25 26 27 28 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0 1 2 3 4 5 6 7 8 9
26 0 9 18 27 36 45 54 63 72 81 90 99 108 117 1 26 0 9 18 27 36 45
Default Description
Internal speed step (1 ... 255) applied as
lowest external speed step (= speed step 1)
1
(applies to 14, 28, or 128 speed step modes)
= 1: lowest possible speed
Internal speed step (1 ... 255) applied as
0, 1
highest external speed step
corresponds
(14, 25 or 128, depending on the speed step mode
to
selected in CV # 29, Bit 1)
255
=0 = 1 (same as 255): fastest top speed possible.
Example of a freely
programmed speed
curve according to
the values entered
in to configuration
variables #67 - 94.
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
54 63 72 81 90 99 108 117 1 26