Trinamic TMCM-1141 User manual

MODULES FOR STEPPER MOTORS MODULES
TRINAMIC Motion Control GmbH & Co. KG
Hamburg, Germany
www.trinamic.com
Hardware Version V1.3
HARDWARE MANUAL
++TMCM-1141
+ +
UNIQUE FEATURES
1-Axis Stepper
Controller / Driver
24 V DC
up-to 1.1 A/ 2A RMS
USB, RS485, and S/D Interface

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Table of Contents
1Features ...........................................................................................................................................................3
2Order Codes .....................................................................................................................................................5
3Mechanical and Electrical Interfacing ..............................................................................................................6
3.1 Dimensions and Mounting Holes .............................................................................................................6
3.2 Connectors of TMCM-1141......................................................................................................................7
3.2.1 Power and RS485 Connector..............................................................................................................8
3.2.2 Mini-USB Connector .........................................................................................................................10
3.2.3 Multipurpose I/O Connector ............................................................................................................11
3.2.4 Step/Direction Connector.................................................................................................................15
3.2.5 Motor Connector..............................................................................................................................16
4Motor driver current......................................................................................................................................17
5Reset to Factory Defaults...............................................................................................................................20
6On-Board LED.................................................................................................................................................20
7Operational Ratings........................................................................................................................................21
8Functional Description ...................................................................................................................................23
9TMCM-1141 Operational Description............................................................................................................24
9.1 Calculation: Velocity and Acceleration vs. Microstep and Fullstep Frequency......................................24
10 Life Support Policy..........................................................................................................................................26
11 Revision History..............................................................................................................................................27
11.1 Document Revision ................................................................................................................................27
11.2 Hardware Revision .................................................................................................................................27
12 References .....................................................................................................................................................28

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1Features
The TMCM-1141 is a single axis controller/driver module for 2-phase bipolar stepper motors with state of the art
feature set. It is highly integrated, offers a convenient handling and can be used in many decentralized applications.
The module can be mounted on the back of NEMA 17 (42mm flange size) stepper motors and has been designed for
coil currents up to 1.1 A RMS RMS (low current range, programmable) or 2A RMS (high current range,
programmable, new additional range since hardware version 1.3) and 24V DC supply voltage. With its high energy
efficiency from TRINAMIC’s coolStep™ technology cost for power consumption is kept down. The TMCL™ firmware
supports remote control (direct mode) and standalone operation (with TMCL program being executed on the TMCM-
1141 itself).
MAIN CHARACTERISTICS
Motion controller
-Motion profile calculation in real-time
-On the fly alteration of motor parameters (e.g. position, velocity, acceleration)
-High performance microcontroller for overall system control and serial communication protocol handling
Bipolar stepper motor driver
-Up to 256 microsteps per full step
-High-efficient operation, low power dissipation
-Dynamic current control
-Integrated protection
-stallGuard2 feature for stall detection
-coolStep feature for reduced power consumption and heat dissipation
Interfaces
-RS485 2-wire communication interface
-USB full speed (12Mbit/s) device interface
-Step/Direction/Enable interface (optically isolated) for external control of driver circuit
-4 multipurpose inputs:
-3x general-purpose digital inputs
(Alternate functions: STOP_L / STOP_R / HOME switch inputs)
-1x dedicated analog input
-2 general purpose outputs
-2x open-drain 100 mA max.
Software
-TMCL: standalone operation or remote controlled operation,
program memory (non volatile) for up to 1024 TMCL commands, and
PC-based application development software TMCL-IDE available for free.
Electrical and mechanical data
-Supply voltage: +24 V DC nominal (9… 28 V DC)
-Motor current: up to 1.1 A RMS / 1.6 A peak (low current range, programmable) or 2A RMS / 2.8A peak (high
current range, programmable, new additional range since hardware version 1.3)
Refer to separate TMCL Firmware Manual, too.

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TRINAMICS UNIQUE FEATURES –EASY TO USE WITH TMCL
stallGuard2™stallGuard2 is a high-precision sensorless load measurement using the back EMF on the coils. It can
be used for stall detection as well as other uses at loads below those which stall the motor. The
stallGuard2 measurement value changes linearly over a wide range of load, velocity, and current
settings. At maximum motor load, the value goes to zero or near to zero. This is the most energy-
efficient point of operation for the motor.
Load
[Nm]
stallGuard2
Initial stallGuard2
(SG) value: 100%
Max. load
stallGuard2 (SG) value: 0
Maximum load reached.
Motor close to stall.
Motor stalls
Figure 1.1 stallGuard2 load measurement SG as a function of load
coolStep™coolStep is a load-adaptive automatic current scaling based on the load measurement via
stallGuard2 adapting the required current to the load. Energy consumption can be reduced by as
much as 75%. coolStep allows substantial energy savings, especially for motors which see varying
loads or operate at a high duty cycle. Because a stepper motor application needs to work with a
torque reserve of 30% to 50%, even a constant-load application allows significant energy savings
because coolStep automatically enables torque reserve when required. Reducing power
consumption keeps the system cooler, increases motor life, and allows reducing cost.
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
0 50 100 150 200 250 300 350
Efficiency
Velocity [RPM]
Efficiency with coolStep
Efficiency with 50% torque reserve
Figure 1.2 Energy efficiency example with coolStep

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2Order Codes
Order code
Description
Size (mm3)
TMCM-1141-option
Single axis bipolar stepper motor controller / driver electronics with
coolStep feature
37 x 37 x 11.5
Table 2.1 Order codes
The following options are available:
Firmware option
Description
Order code example:
-TMCL
Module pre-programmed with TMCL firmware
TMCM-1141-TMCL
Table 2.2 Firmware options
A cable loom set is available for this module:
Order code
Description
TMCM-1141-CABLE
Cable loom for TMCM-1141:
-1x cable loom for power and RS485 connector (length 200mm)
1x cable loom for multi-purpose I/O connector (length 200mm)
-1x cable loom for S/D connector (length 200mm)
-1x cable loom for motor connector (length 200mm)
-1x USB type A connector to mini-USB type B connector cable (length 1.5m)
Table 2.3 Cable loom order codes
Please note that the TMCM-1141 is available with NEMA17 stepper motors, too. Refer to the PD-1141 documents for
more information about these products.

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3Mechanical and Electrical Interfacing
3.1 Dimensions and Mounting Holes
The dimensions of the controller/driver board are approx. 37 mm x 37 mm x 11.5 mm in order to fit on the back of
a 42 mm stepper motor. Maximum component height (height above PCB level) without mating connectors is around
8mm above PCB level and 2 mm below PCB level. There are two mounting holes for M3 screws for mounting to a
NEMA17 stepper motor.
34
2xM3
37
34
37
3
3
Figure 3.1 Dimensions of TMCM-1141 and position of mounting holes

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3.2 Connectors of TMCM-1141
The TMCM-1141 controller/driver board offers five connectors including the motor connector which is used for
attaching the motor coils to the electronics. Further, there is a connector for power and for the RS485 interface. The
USB interface and the step/direction interface have their own connectors. The 8pin multipurpose I/O connector
offers four multipurpose inputs and two general purpose outputs.
Motor
14 1 5
Power and
RS485
1
8
Multi-
purpose
I/O
Step /
Direction
USB
14
Figure 3.2 Overview connectors
Label
Connector type
Mating connector type
Power and
RS485
Connector
CI0105P1VK0-LF
CVIlux CI01 series, 5 pins, 2mm pitch
Connector housing CVIlux: CI01055000-A
Contacts CVIlux: CI01T011PE0-A
or
Connector housing JST: PHR-5
Contacts JST: SPH-002T-P0.5S
Wire: 0.22mm2
Multi-purpose
I/O Connector
CI0108P1VK0-LF
CVIlux CI01 series, 8 pins, 2mm pitch
Connector housing CVIlux: CI01085000-A
Contacts CVIlux: CI01T011PE0-A
or
Connector housing JST: PHR-8
Contacts JST: SPH-002T-P0.5S
Wire: 0.22mm2
Step/Direction
Connector
CI0104P1VK0-LF
CVIlux CI01 series, 4 pins, 2mm pitch
Connector housing CVIlux: CI01045000-A
Contacts CVIlux: CI01T011PE0-A
or
Connector housing JST: PHR-4
Contacts JST: SPH-002T-P0.5S
Wire: 0.22mm2
Motor
Connector
CI0104P1VK0-LF
CVIlux CI01 series, 4 pins, 2mm pitch
Connector housing CVIlux: CI01045000-A
Contacts CVIlux: CI01T011PE0-A
or
Connector housing JST: PHR-4
Contacts JST: SPH-002T-P0.5S
Wire: 0.22mm2
Mini-USB
Connector
Molex 500075-1517
Mini USB Type B vertical receptacle
Any standard mini-USB plug
Table 3.1 Connectors and mating connectors, contacts and applicable wire

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3.2.1 Power and RS485 Connector
A 5pin single row connector is used for power supply and RS485 serial communication.
5
1
Pin
Label
Direction
Description
1
GND
Power (GND)
System and signal ground
2
VDD
Power (Supply)
VDD (+9 V… +28 V)
3
GND
Power (GND)
System and signal ground
4
RS485+
Bidirectional
RS485 interface, diff. signal (non-inverting)
5
RS485-
Bidirectional
RS485 interface, diff. signal (inverting)
Table 3.2 Connector for power supply and RS485
3.2.1.1 Power Supply
For proper operation care has to be taken with regard to power supply concept and design. Due to space restrictions
the TMCM-1141 includes about 40µF/35V of supply filter capacitors. These are ceramic capacitors which have been
selected for high reliability and long life time. The module includes a 24V suppressor diode for over-voltage
protection.
CAUTION!
Add external power supply capacitors!
It is recommended to connect an electrolytic capacitor of significant size (e.g. 1000µF/35V) to the
power supply lines next to the TMCM-1141 especially if the distance to the power supply is large
(i.e. more than 2-3m)! In larger systems a zener diode circuitry might be required in order to limit
the maximum voltage when the motor is operated at high velocities.
Rule of thumb for size of electrolytic capacitor: c = 1000 μF
A× ISUPPLY
In addition to power stabilization (buffer) and filtering this added capacitor will also reduce any
voltage spikes which might otherwise occur from a combination of high inductance power supply
wires and the ceramic capacitors. In addition it will limit slew-rate of power supply voltage at the
module. The low ESR of ceramic-only filter capacitors may cause stability problems with some
switching power supplies.
Keep the power supply voltage below the upper limit of 28V!
Otherwise the driver electronics will seriously be damaged! Especially, when the selected operating
voltage is near the upper limit a regulated power supply is highly recommended. Please see also
chapter 7 (operating values).
There is no reverse polarity protection!
The module will short any reversed supply voltage due to internal diodes of the driver transistors.

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3.2.1.2 RS485
For remote control and communication with a host system the TMCM-1141 provides a two wire RS485 bus interface.
For proper operation the following items should be taken into account when setting up an RS485 network:
1. BUS STRUCTURE:
The network topology should follow a bus structure as closely as possible. That is, the connection between
each node and the bus itself should be as short as possible. Basically, it should be short compared to the
length of the bus.
c:> node
1
node
n- 1
node
n
Host Slave Slave Slave
RS485
termination
resistor
(120 Ohm)
termination
resistor
(120 Ohm)
}
keep distance as
short as possible
Figure 3.3: Bus structure
2. BUS TERMINATION:
Especially for longer busses and/or multiple nodes connected to the bus and/or high communication
speeds, the bus should be properly terminated at both ends. The TMCM-1141 does not integrate any
termination resistor. Therefore, 120 Ohm termination resistors at both ends of the bus have to be added
externally.
3. NUMBER OF NODES:
The RS485 electrical interface standard (EIA-485) allows up to 32 nodes to be connected to a single bus.
The bus transceivers used on the TMCM-1141 units (hardware V1.2: SN65HVD3082ED, since hardware
V1.3: SN65HVD1781D) have a significantly reduced bus load and allow a maximum of 255 units to be
connected to a single RS485 bus using TMCL firmware. Please note: usually it cannot be expected to get
reliable communication with the maximum number of nodes connected to one bus and maximum supported
communication speed at the same time. Instead, a compromise has to be found between bus cable length,
communication speed and number of nodes.
4. COMMUNICATION SPEED:
The maximum RS485 communication speed supported by the TMCM-1141 is 115200 bit/s for hardware
version 1.2 and 1Mbit/s for hardware version 1.3. Factory default is 9600 bit/s. Please see separate TMCM-
1141 TMCL firmware manual for information regarding other possible communication speeds.
5. NO FLOATING BUS LINES:
Avoid floating bus lines while neither the host/master nor one of the slaves along the bus line is transmitting
data (all bus nodes switched to receive mode). Floating bus lines may lead to communication errors. In
order to ensure valid signals on the bus it is recommended to use a resistor network connecting both bus
lines to well defined logic levels.
There are actually two options which can be recommended:
Add resistor (Bias) network on one side of the bus, only (120R termination resistor still at both ends):

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node
n- 1
node
n
Slave Slave
termination
resistor
(120R)
+5V
GND
pull-up (680R)
pull-down (680R)
RS485- / RS485B
termination
resistor
(220R)
RS485+ / RS485A
Figure 3.4: Bus lines with resistor (Bias) network on one side, only
Or add resistor (Bias) network at both ends of the bus (like Profibus™ termination):
node
n- 1
node
n
Slave Slave
termination
resistor
(220R)
+5V
GND
pull-up (390R)
pull-down (390R)
RS485- / RS485B
RS485+ / RS485A
termination
resistor
(220R)
+5V
GND
pull-up (390R)
pull-down (390R)
Figure 3.5: Bus lines with resistor (Bias) network at both ends
3.2.2 Mini-USB Connector
A 5pin mini-USB connector is available on-board for serial communication (as alternative to the RS485 interface).
This module supports USB 2.0 Full-Speed (12Mbit/s) connections.
1
5
Pin
Label
Direction
Description
1
VBUS
Power
(supply input)
+5V supply from host
2
D-
Bidirectional
USB Data –
3
D+
Bidirectional
USB Data +
4
ID
Power (GND)
Connected to signal and system ground
5
GND
Power (GND)
Connected to signal and system ground
Table 3.3 Connector for USB
For remote control and communication with a host system the TMCM-1141 provides a USB 2.0 full-speed (12Mbit/s)
device interface (mini-USB connector). As soon as a USB host is connected the module will accept commands via
USB.
USB BUS POWERED OPERATION MODE
The TMCM-1141 supports both, USB self powered operation (when an external power is supplied via the power
supply connector) and USB bus powered operation, (no external power supply via power supply connector).
During USB bus powered operation the on-board digital core logic will be powered, only. The digital core logic
consists of the microcontroller itself and also the EEPROM. The USB bus powered operation mode has been

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implemented to enable configuration, parameter settings, read-outs, firmware updates, etc. by just connecting an
USB cable between module and host PC. No additional cabling or external devices (e.g. power supply) are required.
Please note that the module might draw current from the USB +5V bus supply even in USB self powered operation
depending on the voltage level of this supply.
Motor movements are not possible during USB bus powered operation! Apply power to the power connector (USB
self powered operation) in order to be able to move the motor.
3.2.3 Multipurpose I/O Connector
An 8pin 2mm pitch single row connector is available for all multipurpose inputs and outputs.
8
1
Pin
Label
Direction
Description
1
GND
Power (GND)
System and signal ground
2
VDD
Power (Supply)
VDD, connected to VDD pin of the power and RS485
connector
3
OUT_0
Output
Open-drain output (max. 100 mA)
Integrated freewheeling diode to VDD
4
OUT_1
Output
Open-drain output (max. 100 mA)
Integrated freewheeling diode to VDD
5
IN_0
Input
Dedicated analog input,
Input voltage range: 0… +10V
Resolution: 12bit (0… 4095)
6
IN_1
Input
General purpose digital input (+24 V compatible)
Alternate function: left stop switch input
7
IN_2
Input
General purpose digital input (+24 V compatible)
Alternate function: right stop switch input
8
IN_3
Input
General purpose digital input (+24 V compatible)
Alternate function: home switch input
Table 3.4 Multipurpose I/O connector
Note:
-All inputs have resistor based voltage input dividers with protection diodes. These resistors also ensure
a valid GND level when left unconnected.
-For all digital inputs (IN_1, IN_2, IN_3) a 1k pull-up resistor to +5V can be activated. In this case these
inputs have a default (unconnected) logic level of 1 and an external switch to GND can be connected.
This might be especially interesting in case these inputs are used as STOP_L / STOP_R and HOME switch
inputs (alternate function).
3.2.3.1 Digital Inputs IN_1, IN_2, IN_3
The eight pin connector of the TMCM-1141 provides three multipurpose digital inputs IN_1, IN_2 and IN_3. All three
inputs accept up to +24V (nom.) input signals and offer the same input circuit with voltage resistor dividers, limiting
diodes against over- and under-voltage and programmable 2k2 pull-up resistors.
The pull-ups can be switched on or off for all three inputs at once in software.
With TMCL firmware command SIO 0, 0, 0will switch-off the pull-ups and command SIO 0, 0, 1will switch them on
(see separate TMCL firmware manual, command SIO for more detailed information).

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+3.3V
IN_1
IN_2
IN_3
microcontroller (all)
and TMC429 (IN_0, IN_1)
10k
22k
1nf
GND GND GND
common switch for all
three digital inputs
1k
+5V
Figure 3.6 General purpose inputs (simplified input circuit)
The three digital inputs have alternate functionality depending on configuration in software. The following functions
are available:
Label
(pin)
Default function
Alternate function 1
IN_1 (6)
General purpose digital input
TMCL: GIO 1, 0 // get digital value of
input IN_1
STOP_L - left stop switch input
connected to processor and TMC429 REF input (supporting left
stop functionality in hardware)
TMCL: GAP 11, 0 // get digital value of STOP_L input
IN_2 (7)
General purpose digital input
TMCL: GIO 2, 0 // get digital value of
input IN_2
STOP_R - right stop switch input
connected to processor and TMC429 REF input (supporting
right stop switch functionality in hardware)
TMCL: GAP 10, 0 // get digital value of STOP_R input
IN_3 (8)
General purpose digital input
TMCL: GIO 3, 0 // get digital value of
input IN_3
HOME - home switch input
(connected to processor)
TMCL: GAP 9, 0 // get digital value of HOME input
Table 3.5 Multipurpose inputs / alternate functions
-All three digital inputs are connected to the on-board processor and can be used as general purpose digital
inputs.
-In order to use IN_1 and IN_2 as STOP_L and STOP_R inputs, this function has to be enabled explicitly in
software (factory default: switched off). With TMCL firmware the stop switch functionality can be enabled
using SAP 12, 0, 0 (STOP_R / right limit switch) and SAP 13, 0, 0 (STOP_L / left limit switch). As the names
already indicate: the status of the left limit switch (STOP_L) will be significant during motor left turns and
the status of the right limit switch during motor right turns (positive direction), only. Reading out input
values using the GAP commands as listed in the table above is possible at any time. Please see separate
TMCL firmware manual for additional information.

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3.2.3.2 Analog Input IN_0
The eight pin connector of the TMCM-1141 provides one dedicated analog input IN_0.
This dedicated analog input offers a full scale input range of 0… +10V (0..+10.56V nom.) with a resolution of the
internal analog-to-digital converter of the microcontroller of 12 bit (0… 4095).
The input is protected against higher voltages up-to +24 V using voltage resistor dividers together with limiting
diodes against voltages below 0 V (GND) and above +3.3 V DC (see figure below).
+3.3V
IN_0
ADC input
(microcontroller)
22k
10k
10nF
GND GND GND
Figure 3.7 General purpose inputs (simplified input circuit)
With TMCL firmware the analog value of this input may be read using command GIO 0, 1. The command will return
the raw value of the 12bit analog-to-digital converter between 0 .. 4095. It is also possible to read the digital value
of this input using TMCL command GIO 0, 0. The trip point (between 0 and 1) will be at approx. +5V input voltage
(half the analog input range).
3.2.3.3 Outputs OUT_0, OUT_1
The eight pin connector of the TMCM-1141 offers two general purpose outputs OUT_0 and OUT_1. These two
outputs are open-drain outputs and can sink up to 100 mA each. The outputs of the N-channel MOSFET transistors
are connected to freewheeling diodes each for protection against voltage spikes especially from inductive loads
(relais etc.) above supply voltage (see figure below).
OUT_0 and OUT_1 should not be connected to any voltage above supply voltage of the module due to the internal
freewheeling diodes.
VDD
microcontroller
GND GND
10k since V1.3
Figure 3.8 General purpose outputs

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Since hardware version 1.3 the gate inputs of the MOSFETs are pulled-low during power-up and while the processor
is still in reset / output pins not initialized. This way, the outputs will not briefly switch on at power-up.
With TMCL firmware OUT_0 can be switched on (OUT_0 pulled low) using command SIO 0, 2, 1and off again (OUT_0
floating) using command SIO 0, 2, 0. Quite similar OUT_1 can be switched on (OUT_1 pulled low) using command
SIO 1, 2, 1and off again (OUT_1 floating) using command SIO 1, 2, 0. Factory default setting for both outputs is off
(floating). In case a floating output is not desired in the application an external resistor to e.g. supply voltage may be
added.

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3.2.4 Step/Direction Connector
A 4pin 2mm pitch single row connector is available for the Step/Dir interface. This interface can be used for
connecting an external motion controller to the on-board driver stage instead of the integrated motion controller.
All three Step/Dir/Enable signals are optically isolated. Therefore, an additional supply input (COMMON) is available
which has to be connected to a supply voltage between +5 V and +24 V for proper operation.
4
1
Pin
Label
Direction
Description
1
COMMON
Power
(Supply input)
Power supply input for the three Step / Direction /
Enable signals. Accepts voltages between +5V and
+24V nom.
2
/ENABLE
Input
Enable input
(function depends on firmware)
3
STEP
Input
Step pulse input
(connected to step input of TMC262 driver IC)
4
DIRECTION
Input
Direction input
(connected to direction input of TMC262 driver IC)
Table 3.6: Step/Direction connector
3.2.4.1 Step / Direction / Enable inputs
The inputs Step / Direction / Enable are electrically (optically) isolated from the power supply and all other signals
of the TMCM-1141 module. These inputs have one common reference input COMMON (see Figure 3.). The
COMMON input should be connected to a positive supply voltage between +5V and +24V. Step / Direction / Enable
signals might be driven either by open-collector / open-drain outputs or by push-pull outputs. In case of push-pull
outputs the COMMON supply voltage should be equal / similar to the high signal voltage level of the push-pull drivers
(otherwise the LEDs will not be turned off during signal high-level). There is no need to add external resistors in line
with the “Enable”, “Step” or “Direction” inputs. The internal current sources (Figure 3.8) will adjust the current
through the LEDs of the optical isolation to approx. 8mA for signal input voltages between nom. +5V and +24V.
8mA
8mA
8mA
+3.3V
GND
Enable
Direction
Step
Common
(5..24V)
microcontroller
TMC262
TMC262
Figure 3.9 Step/Dir/Enable inputs

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3.2.5 Motor Connector
As motor connector a 4pin 2mm pitch single row connector is available. The motor connector is used for connecting
the four motor wires of the two motor coils of the bipolar stepper motor to the electronics.
4
1
Pin
Label
Direction
Description
1
OB2
Output
Pin 2 of motor coil B
2
OB1
Output
Pin 1 of motor coil B
3
OA2
Output
Pin 2 of motor coil A
4
OA1
Output
Pin 1 of motor coil A
Table 3.7 Motor connector
Do not connect or disconnect motor during operation!
Motor cable and motor inductivity might lead to voltage spikes when the motor is disconnected /
connected while energized. These voltage spikes might exceed voltage limits of the driver
MOSFETs and might permanently damage them. Therefore, always disconnect power supply
before connecting / disconnecting the motor.
For hardware version 1.3: please note the additional high current range for motor currents up-
to 2A RMS!
Setting motor current too high might lead to excessive power dissipation inside the motor,
overheating and even permanent damage of the motor. Therefore, make sure the motor current
is properly set. Also with hardware version 1.3 the low current range is set as default.
M
A
black
green
B
blue
red
TMCM-1141
QS4218 Motor
Motor connector pin
Cable color
Coil
Description
1
Red
B
Motor coil B pin 1
2
Blue
B-
Motor coil B pin 2
3
Green
A-
Motor coil A pin 2
4
Black
A
Motor coil A pin 1

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4Motor driver current
The on-board stepper motor driver operates current controlled. The driver current may be programmed in software
in two ranges (low current range up-to 1.1A RMS and high current range up-to 2A RMS) with 32 effective scaling
steps in hardware for each range.
Please note: the high current range is available with hardware revision V1.3, only and should not be activated /
used with hardware revision V1.2! The high current range should not be used with motor currents above 2A RMS
–this will violate specification of the module - please note limitations at the end of this chapter!
Explanation of different columns in table below:
Motor current
setting in
software (TMCL)
These are the values for TMCL axis parameter 6 (motor run current) and 7 (motor standby
current). They are used to set the run / standby current using the following TMCL
commands:
SAP 6, 0, <value> // set run current
SAP 7, 0, <value> // set standby current
(read-out value with GAP instead of SAP. Please see separate TMCM-1141 firmware
manual for further information)
Range setting in
software
(TMCL)
This is the value for TMCL axis parameter 179 (Vsense). This value defines the current
range. This value can be set using the following TMCL command:
SAP 179, 0, <value> // =0high current range
// = 1 low current range
For <value> either 0 (high current range) or 1 (low current range) is supported (see
table) since hardware revision V1.3. For hardware revision V1.2 this parameter should not
be changed to any value other than “1” (low current range).
(read-out value with GAP instead of SAP. Please see separate TMCM-1141 firmware
manual for further information)
Motor current
IRMS [A]
Resulting motor current based on range and motor current setting
Motor current
setting in
software (TMCL)
Range setting in
software
(TMCL)
Current
scaling step
(CS)
Motor
current
ICOIL_PEAK [A]
Motor current
ICOIL_RMS [A]
0..7
1
0
0.052
0.036
8..15
1
1
0.103
0.073
16..23
1
2
0.155
0.109
24..31
1
3
0.206
0.146
32..39
1
4
0.258
0.182
40..47
1
5
0.309
0.219
48..55
1
6
0.361
0.255
56..63
1
7
0.413
0.292
64..71
1
8
0.464
0.328
72..79
1
9
0.516
0.365
80..87
1
10
0.567
0.401
88..95
1
11
0.619
0.438

TMCM-1141 Hardware Manual (Rev. 1.06 / 2015-JAN-09) 18
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Motor current
setting in
software (TMCL)
Range setting in
software
(TMCL)
Current
scaling step
(CS)
Motor
current
ICOIL_PEAK [A]
Motor current
ICOIL_RMS [A]
96..103
1
12
0.670
0.474
104..111
1
13
0.722
0.510
112..119
1
14
0.773
0.547
120..127
1
15
0.825
0.583
128..135
1
16
0.877
0.620
136..143
1
17
0.928
0.656
144..151
1
18
0.980
0.693
152..159
1
19
1.031
0.729
160..167
1
20
1.083
0.766
168..175
1
21
1.134
0.802
176..183
1
22
1.186
0.839
184..191
1
23
1.238
0.875
192..199
1
24
1.289
0.912
200..207
1
25
1.341
0.948
208..215
1
26
1.392
0.984
216..223
1
27
1.444
1.021
224..231
1
28
1.495
1.057
232..239
1
29
1.547
1.094
240..247
1
30
1.598
1.130
248..255
1
31
1.650
1.167
0..7
0
0
0.095
0.067
8..15
0
1
0.191
0,135
16..23
0
2
0.286
0.202
24..31
0
3
0.381
0.270
32..39
0
4
0.477
0.337
40..47
0
5
0.572
0.404
48..55
0
6
0.667
0.472
56..63
0
7
0.763
0.539
64..71
0
8
0.858
0.607
72..79
0
9
0.953
0.674
80..87
0
10
1.048
0.741
88..95
0
11
1.144
0.809
96..103
0
12
1.239
0.876
104..111
0
13
1.334
0.944
112..119
0
14
1.430
1.011
120..127
0
15
1.525
1.078
128..135
0
16
1.620
1.146
136..143
0
17
1.716
1.213
144..151
0
18
1.811
1.281
152..159
0
19
1.906
1.348
160..167
0
20
2.002
1.415
168..175
0
21
2.097
1.483
176..183
0
22
2.192
1.550
184..191
0
23
2.288
1.618
192..199
0
24
2.383
1.685
200..207
0
25
2.478
1.752
208..215
0
26
2.573
1.820
216..223
0
27
2.669
1.887
224..231
0
28
2.764
1.954
232..239
0
29
2.859
2.022
240..247
0
30
2.955
2.089
248..255
0
31
3.050
2.157

TMCM-1141 Hardware Manual (Rev. 1.06 / 2015-JAN-09) 19
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The settings marked red in the table above from the high current range (above 2A RMS motor current) should
not be used as they will violate specification of the module!
In addition to the settings in the table the motor current may be switched off completely (free-wheeling) using axis
parameter 204 (see TMCM-1141 firmware manual).

TMCM-1141 Hardware Manual (Rev. 1.06 / 2015-JAN-09) 20
www.trinamic.com
5Reset to Factory Defaults
It is possible to reset the TMCM-1141 to factory default settings without establishing a communication link. This
might be helpful in case communication parameters of the preferred interface have been set to unknown values or
got accidentally lost.
For this procedure two pads on the bottom side of the board have to be shortened.
Now, perform the following steps:
1. Power supply off and USB cable disconnected
2. Short two pads as marked in Figure 5.1
3. Power up board (power via USB is sufficient for this purpose)
4. Wait until the on-board red and green LEDs start flashing fast (this might take a while)
5. Power-off board (disconnect USB cable)
6. Remove short between pads
7. After switching on power-supply / connecting USB cable all permanent settings have been restored to
factory defaults
Short these two pads
Figure 5.1 Reset to factory default settings
6On-Board LED
The board offers an LED in order to indicate board status. The function of the LED is dependent on the firmware
version. With standard TMCL firmware the green LED should be flashing slowly during operation. When there is no
valid firmware programmed into the board or during firmware update the green LED is permanently on.
BEHAVIOR OF LEDS WITH STANDARD TMCL FIRMWARE
Status
Label
Description
Heartbeat
Run
This green LED flashes slowly during operation.
Green LED
Figure 6.1 On-board LED