User Manual

PD57/60-1260 TMCL
™
Firmware Manual • Firmware Version V1.44 | Document Revision V1.02 • 2018-SEP-05
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Number Axis Parameter Description Range [Units] Access
162 Chopper blank
time
Selects the comparator blank time. This time
needs to safely cover the switching event and
the duration of the ringing on the sense resistor.
Normally leave at the default value.
0..3 RW
163 Constant TOff
mode
Selection of the chopper mode:
0 – spread cycle
1 – classic constant off time
0/1 RW
164 Disable fast
decay
comperator
See parameter 163. For ”classic const. off time”
setting this parameter to ”1” will disable current
comparator usage for termination of fast decay
cycle.
0/1 RW
165 Chopper
hysteresis end /
fast decay time
See parameter 163. For ”spread cycle” chopper
mode this parameter will set / return the hys-
teresis end setting (hysteresis end value after a
number of decrements). For ”classic const. off
time” chopper mode this parameter will set /
return the fast decay time.
0. . . 15 RW
166 Chopper
hysteresis start
/ sine wave
offset
See parameter 163. For ”spread cycle” chopper
mode this parameter will set / return the Hys-
teresis start setting (please note that this value is
an offset to the hysteresis end value). For ”clas-
sic const. off time” chopper mode this parameter
will set / return the sine wave offset.
0. . . 8 RW
167 Chopper off
time (TOff)
The off time setting controls the minimum
chopper frequency. An off time within the range
of 5µs to 20µs will fit.
Off time setting for constant t Off chopper:
N
CLK
= 12 + 32 ∗ tOF F (Minimum is 64 clocks)
Setting this parameter to zero completely dis-
ables all driver transistors and the motor can
free-wheel.
0. . . 15 RW
168 SmartEnergy
current
minimum
(SEIMIN)
Sets the lower motor current limit for CoolStep
operation by scaling the maximum current (see
axis parameter 6) value.
Minimum motor current:
0 -
1
2
of CS
1 -
1
4
of CS
0/1 RW
169 SmartEnergy
current down
step
Sets the number of StallGuard2 readings above
the upper threshold necessary for each current
decrement of the motor current. Number of
StallGuard2 measurements per decrement:
Scaling: 0. . . 3: 32, 8, 2, 1
0: slow decrement
3: fast decrement
0. . . 3 RW
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