Trinamic IDX, IDX 7505 User Manual

Download

Page 1

IDX (IDX and IDX 7505)

Manual

STEPPER motor controller/driver modules

IDX: 3.5A RMS (5A peak) / 48V

IDX 7505: 5.0A RMS (7A peak) / 75V

with RS485 and step-/ direction interface

Trinamic Motion Control GmbH & Co. KG

Sternstraße 67

D – 20357 Hamburg, Germany

http://www.trinamic.com

Page 2

IDX Manual (V1.15 / September 26th, 2008) 2

Table of Contents

1 Features........................................................................................................................................................................... 4

2 Life support policy ....................................................................................................................................................... 5

3 Electrical and Mechanical Interfacing ..................................................................................................................... 6

3.1 Pinning ................................................................................................................................................................... 6

3.2 Dimensions ........................................................................................................................................................... 7

3.3 Connectors ............................................................................................................................................................ 7

4 Operational Ratings ..................................................................................................................................................... 8

4.1 Practical maximum motor current ratings ................................................................................................... 9

4.2 Step, Direction and Disable Inputs ............................................................................................................. 10

5 Getting Started ............................................................................................................................................................ 11

5.1 Motor .................................................................................................................................................................... 11

5.1.1 Motor Choice ............................................................................................................................................ 11

5.1.1.1 Motor velocity ............................................................................................................................. 11

5.1.1.2 Chopper Modes 0 (SPI / Default Mode) and 1 (PWM) ..................................................... 11

5.1.1.3 Chopper Mode 2 (PHASE) ......................................................................................................... 12

5.2 Connecting Motor and Power Supply ......................................................................................................... 14

5.3 Power Supply Requirements ......................................................................................................................... 14

5.3.1 EMV considerations ................................................................................................................................ 15

5.4 Connections for Step / Direction- Mode ..................................................................................................... 15

5.5 Connections for RS485 Interface .................................................................................................................. 15

5.5.1 Interface installation ............................................................................................................................. 15

5.5.2 Control with terminal program .......................................................................................................... 16

5.6 Functional Description ..................................................................................................................................... 17

5.7 Disable Function ............................................................................................................................................... 17

5.8 RS485 Control Interface .................................................................................................................................. 17

5.8.1 RS485 Commands ................................................................................................................................... 18

5.8.1.1 Examples for test move ........................................................................................................... 19

5.8.1.2 Motor Current (C) ....................................................................................................................... 19

5.8.1.3 Failure Readout (E) .................................................................................................................... 19

5.8.1.4 StallGuard (G) .............................................................................................................................. 20

5.8.1.5 Limit Switch (L) ........................................................................................................................... 20

5.8.1.6 Output setting (O) ...................................................................................................................... 21

5.8.1.7 I/Os Readout (Q) ......................................................................................................................... 21

5.8.1.8 Baud Rate (U) .............................................................................................................................. 21

5.8.1.9 Velocity Mode (V) ....................................................................................................................... 22

5.8.1.10 Store Parameters to EEPROM (W) .......................................................................................... 22

5.8.1.11 Microstep Resolution (Z) .......................................................................................................... 23

5.8.2 Chopper Modes ....................................................................................................................................... 23

5.8.2.1 Chopper Mode 0 (SPI) / Default Mode ................................................................................. 23

5.8.2.2 Chopper Mode 1 (PWM) ........................................................................................................... 24

5.8.2.3 Chopper Mode 2 (PHASE) ......................................................................................................... 24

5.8.2.4 Chopper mode 3 (Phase and SPI) ......................................................................................... 25

5.8.2.5 Chopper mode 4 (PWM and SPI) .......................................................................................... 25

5.9 Step / Direction.................................................................................................................................................. 26

5.9.1 Direction .................................................................................................................................................... 26

5.9.2 Step ............................................................................................................................................................ 27

5.10 Reset to factory default ................................................................................................................................... 27

5.11 Firmware Update ............................................................................................................................................... 28

5.12 Option: Pseudo DC-Motor mode (not supported by software yet) .................................................... 29

5.12.1 Setting up the module ......................................................................................................................... 29

5.12.2 Parameterizing with RS485 .................................................................................................................. 29

5.12.3 Motion Control ........................................................................................................................................ 29

6 Revision History .......................................................................................................................................................... 30

6.1 Documentation Revision ................................................................................................................................. 30

6.2 Firmware Revision ............................................................................................................................................ 30

Page 3

IDX Manual (V1.15 / September 26th, 2008) 3

List of Figures

Figure 3.1: Pinning of IDX .................................................................................................................................................. 6

Figure 3.2: Dimensions ........................................................................................................................................................ 7

Figure 3.3: Base Plate Dimensions .................................................................................................................................. 7

Figure 4.1: Step, Direction and Disable Inputs .......................................................................................................... 10

Figure 5.1: Maximum voltage regarding motor current and inductivity ............................................................ 13

Figure 5.2: Connecting Motor and Power Supply ..................................................................................................... 14

Figure 5.3: Contacts for Step-Direction ......................................................................................................................... 15

Figure 5.4: Contacts for RS485 with an adapter ........................................................................................................ 15

Figure 5.5 : Connection settings for RS485 ................................................................................................................. 16

Figure 5.6: Main parts of the TMCM-IDX ....................................................................................................................... 17

Figure 5.7: GPO wiring scheme ...................................................................................................................................... 21

Figure 5.8: Step-Direction signals and motor reactions .......................................................................................... 26

Figure 5.9: Step and Direction Signal ........................................................................................................................... 27

Figure 5.10: Reset to factory default ............................................................................................................................. 27

Figure 5.11: Firmware update tool ................................................................................................................................ 28

Figure 5.12: GPI wiring scheme...................................................................................................................................... 29

Figure 5.13: Layout Changes for DC-Motor option .................................................................................................... 29

List of Tables

Table 1.1: Order codes ......................................................................................................................................................... 4

Table 3.1: Power and Motor Pinning .............................................................................................................................. 6

Table 3.2: Controls Pinning ................................................................................................................................................ 6

Table 4.1: Operational Ratings (Orange: Different values for IDX 7505)............................................................... 8

Table 4.2.1: Practical motor current limitations for IDX 7505 .................................................................................. 9

Table 5.1: Maximum voltage regarding motor current and inductivity .............................................................. 12

Table 5.2: RS485 Commands ............................................................................................................................................ 18

Table 5.3: Motor Current Examples for IDX ................................................................................................................. 19

Table 5.4: Failure readout in SPI mode........................................................................................................................ 19

Table 5.5: StallGuard .......................................................................................................................................................... 20

Table 5.6: Limit switch....................................................................................................................................................... 20

Table 5.7: Output adjustment .......................................................................................................................................... 21

Table 5.8: I/Os Readout ..................................................................................................................................................... 21

Table 5.9: Baud rate ........................................................................................................................................................... 21

Table 5.10: Adjustment of Microstep Resolution ....................................................................................................... 23

Table 5.11: Chopper mode 3 switching velocities .................................................................................................... 25

Table 5.12: External signals and motor reactions ..................................................................................................... 26

Table 6.1: Documentation Revisions ............................................................................................................................. 30

Table 6.2: Firmware Revisions......................................................................................................................................... 30

Page 4

IDX Manual (V1.15 / September 26th, 2008) 4

1 Features

The TRINAMIC IDX is a small and rugged step / direction stepper motor driver system with a supply voltage of up to 50V and up to 3.5A RMS motor coil current (up to 75V and up to 5A RMS for IDX 7505). It can be controlled via an RS-485 interface. Up to 256 micro steps are supported for either high accuracy or high speed. An update of the firmware is possible via the serial interface. The system features sensorless stall detection (StallGuardTM) and full protection. The module is fully protected and comes with a stand-alone reference search feature.

The motor, switches and power supply can be connected easily with screw terminal connectors. The housing is based on a thick aluminum plate which is used as a heatsink.

Applications

Step-/ Direction stepper driver for industrial applications Robotics Remote diagnostics / feedback allows for high-reliability drives Centralized motor driver mounted in switchboard Decentralized motor driver mounted near motor

Motor type

Coil current from 500mA to 3.5A RMS (5A peak) (IDX)

Coil current from 500mA to 5.0A RMS (7A peak) (IDX 7505)

12V to 50V nominal supply voltage (or any value in between) (IDX)

12V to 75V nominal supply voltage (or any value in between) (IDX 7505)

Highlights

Remote controlled diagnostics and parameterization (RS485) Reference move and turn CW / CCW via RS485 Stand-alone operation, adjusted via RS485 Fully protected drive Digital selection of motor current and standby current Local reference move using sensorless StallGuard feature or reference switch All setup parameters are stored in internal EEPROM, no bus system required in end application Micro step resolution can be changed to get high accuracy or high speed with the possibility to

combine both

Different chopper modes allow best adaptation to application / motor Many adjustment possibilities make this module the solution for a great field of demands

Order code

Description

IDX

48V, 3.5A IDX module

IDX 7505

75V, 5A IDX module

Table 1.1: Order codes

Page 5

IDX Manual (V1.15 / September 26th, 2008) 5

2 Life support policy

TRINAMIC Motion Control GmbH & Co. KG does not authorize or warrant any of its products for use in life support systems, without the specific written consent of TRINAMIC Motion Control GmbH & Co. KG.

Life support systems are equipment intended to support or sustain life, and whose failure to perform, when properly used in accordance with instructions provided, can be reasonably expected to result in personal injury or death.

Information given in this data sheet is believed to be accurate and reliable. However no responsibility is assumed for the consequences of its use or for any infringement of patents or other rights of third parties, which may result from its use.

Specifications are subject to change without notice.

Page 6

IDX Manual (V1.15 / September 26th, 2008) 6

3 Electrical and Mechanical Interfacing

3.1 Pinning

Power

Motor

Controls

OB2 OB1 OA2 OA1 GND

+VS

Common

Disable

Dir

Step

+5V

RefA

RefB

GND

GPI

GPO

RS485A

RS485B

RS485A

RS485B

IDX

Figure 3.1: Pinning of IDX

Number

Function

OB1, OB2

1, 2

Connections for motor coil B

OA1, OA2

3, 4

Connections for motor coil A

GND

GND, power

+VS 6 Positive power supply voltage

Table 3.1: Power and Motor Pinning

Number

Function

RS485 -

1, 3

RS485 remote control access -, TTL input

RS485 +

2, 4

RS485 remote control access +, TTL input

GPO

General Purpose Output, for wiring scheme see Figure 5.7

GPI 6 General Purpose Input, for wiring scheme see Figure 5.12

GND

GND reference

REF B

Reference signal B (integrated 3.9 K pull up resistor to +5V)

REF A

Reference signal A (integrated 3.9 K pull up resistor to +5V)

+5V

Constant +5V output, reference

Step

Opto-decoupled input (negative terminal): Each impulse causes one motor microstep

Direction

Opto-decoupled input (negative terminal): Polarity determines motor direction

Disable

Opto-decoupled input (negative terminal): Tie to opto-coupler negative supply voltage to disable motor driver

Common

5…24V, Opto-coupler positive supply voltage

Table 3.2: Controls Pinning

Page 7

IDX Manual (V1.15 / September 26th, 2008) 7

3.2 Dimensions

63.5mm

18.5mm

29.5mm

34mm

3mm

Figure 3.2: Dimensions

7mm

12mm

6.5mm

4mm

4.5mm

63.5mm

29.5mm

2.5mm

63.0mm

Figure 3.3: Base Plate Dimensions

3.3 Connectors

Both connectors are RIA connectors. Power and motor: 6 pin connector RM 5.0 (07_06_RM5) Control: Two 4 pin and one 6 pin connectors RM 3.5, (2x 166_04_RM3.5, 1x 166_06_RM35)

Page 8

IDX Manual (V1.15 / September 26th, 2008) 8

4 Operational Ratings

The operational ratings show the intended / the characteristic range for the values and should be used as design values. In no case shall the maximum values be exceeded.

Symbol

Parameter

Min

Typ

Max

Unit

Power supply voltage (IDX)

12 ... 48

58.5

Power supply voltage (IDX 7505)

12 ... 75

78.5

COIL

Motor coil current for sine wave peak (chopper reg., software adjustable) (IDX)

0.7 … 4.3

COIL

Motor peak coil current (IDX 7505)

0.7 … 6.4

7.1

IMC

Nominal RMS motor current (IDX)

0.5 ... 3

3.5

IMC

Nominal motor current (IDX 7505)

0.5 ... 4.5

CHOP

Motor chopper frequency (actual frequency depends on operation mode)

20 or 36

kHz

SLP

Coil output slope

300

Power supply current

<< I

COIL

1.4 * I

COIL

ISO

Isolation voltage of optocoupler

± 42

±100

COM

Supply voltage for step, direction and disable; (inputs have negative logic)

5 ... 24

OPTON

Signal active voltage at disable, step and direction input (optocoupler on, measured from U

COM

to input)

3.5

4.5 .. 24

OPTOFF

Signal inactive voltage at disable, step and direction input (optocoupler off, measured from U

COM

to input)

-5.5 0 2

OPT

Optocoupler current (internally regulated)

4 8

STEPLO

Step impulse low time (optocoupler on)

0.7

µs

STEPHI

Step impulse high time (optocoupler off)

2.0

µs

DIRSETUP

Direction setup time to rising edge of step input

µs

DIRHOLD

Direction hold time after rising edge of step input

3.0

µs

REF

Input low voltage on REFA / REFB

-2 0 0.8

REF

Input high voltage on REFA / REFB

2.4 5 30

GPI

Input voltage on GPI

-2

0 ... 5

GPO

Output voltage on GPO (open collector)

-1 100

GPO

Output current on GPO (open collector)

-150

ENV

Environment temperature

-25 70

°C

Temperature of case back (cooling plate)

-25 85

°C

Table 4.1: Operational Ratings (Orange: Different values for IDX 7505)

Page 9

IDX Manual (V1.15 / September 26th, 2008) 9

4.1 Practical maximum motor current ratings

The IDX 7505 (IDX) uses eight high power 80V (60V) transistors with low internal on resistance of only 15mOhm (24mOhm) to drive the motor. Due to this, power loss is just a few watts at maximum current. In order to avoid EMV problems and to keep electromagnetic emission low, the transistors are switched smoothly on and off with 300ns transitions. On the other hand, this produces dynamic losses and thus additional power dissipation. The resulting power dissipation has to be cooled away by air convection and via the metal base plate, in order to keep transistor and board temperature well below 125°C (Integrated thermal limit). This especially becomes a limiting point for the IDX7505, because of its high voltage capability. The following table gives some examples for the current capability in a typical mounting situation, where the module is mounted to a metal base plate (heat sink with fins, overall dimensions 100*50*15mm³). In this situation the base plate was always kept at maximum 60°C. However, the actual motor type and velocity setting also influences power dissipation of the module.

Chopper

mode

Supply

voltage

Maximum

COIL

RMS

for continuous operation

Maximum duty

cycle for full

current

0, 1

75V

3.5A

50%

0, 1

70V

60%

0, 1

60V

4.5A

80%

0, 1

≤50V

100%

15V … 75V

4A *)

n/a

Table 4.2.1: Practical motor current limitations for IDX 7505

*) This limit is due to the higher current ripple in chopper mode 2, which allows a maximum of 75% to 90% of the maximum current setting. It is not a thermal limit.

Page 10

IDX Manual (V1.15 / September 26th, 2008) 10

4.2 Step, Direction and Disable Inputs

The inputs disable, dir and step are electrically isolated from the module. The inputs are related to V

COM

. In a typical application, U

COM

shall be tied to the positive supply voltage of the master and the

inputs are driven by open collector or push / pull outputs. V

OPTOFF

and V

OPTON

must not exceed V

COM

avoid reverse polarity for the opto couplers.

OFF: V

COM

- VIN < 1.0V

ON: V

COM

- VIN >= 3.5V

COM

5..24V

Disable

Dir

Step

GND

µC

A: Anode C: Cathode C: Collector E: Emitter

+5V

Figure 4.1: Step, Direction and Disable Inputs

Examples:

OPTOFF

OPTON

STEP

= 0V 1.5V 4.0V 5V

undefined

20V19.0V16.5V

OPTON

OPTOFF

undefined

COM

= 5V

COM

= 20V

STEP

= 0V

Page 11

IDX Manual (V1.15 / September 26th, 2008) 11

5 Getting Started

5.1 Motor

Attention: Do not connect or disconnect the motor while power on. Damage to the module may occur.

Attention: A too high motor current setting can damage you motor! If in doubt, start with a low current setting and check motor temperature. If the motor heats up very quickly, check all settings. The motor shall never reach a temperature above 100°C under any circumstances. Some stepper motors need contact to metallic parts to allow continuous operation. Mind the default settings, when you operate in step / direction mode the first time! You can store your own settings in the module permanently.

5.1.1 Motor Choice

Care has to be taken concerning the selection of motor and supply voltage. In the different chopper modes different criteria apply. Modes 0 and 1 are quite insensitive to the motor choice, while Mode 2 is very sensitive, because it uses a different motor current regulation scheme. This chapter gives some mathematical information on the motor choice, but you can skip it if you want to experiment with a given motor. Normally, best results will be achieved when operating the given motor in a range of 50 to 100% of nominal motor current (see motor data sheet). Mode 2 and mode 1 are mainly intended for slow, smooth and very exact movements, due to the high microstepping resolution. For most dynamic operation choose mode 0, or the combined modes 3 and 4 which use mode 1 or 2 for slow movements and switch to mode 0 at a defined velocity.

5.1.1.1 Motor velocity

Whenever it is desired to maximize the motor velocity in a given application, it is important to understand limitations due to supply voltage and motor inductivity. Please consult your motor data sheet for this, as well as the choice of the chopper mode. Chopper mode 0 allows maximum motor velocity.

5.1.1.2 Chopper Modes 0 (SPI / Default Mode) and 1 (PWM)

In these two modes the maximum supply voltage (VS) of the motor must not exceed 22-25 times the nominal motor voltage (VN), regarding the multiplication of I

COIL, MAX

and R

MOTOR

. A higher value would lead to an excess of motor rating. The minimum supply voltage has to be above two times the nominal motor voltage.

MOTORMAX,COILN

NSN

RIV

V25...22VV2

Page 12

IDX Manual (V1.15 / September 26th, 2008) 12

5.1.1.3 Chopper Mode 2 (PHASE)

In Table 5.1 and Figure 5.1 examples of maximum power supply voltages regarding current I

COIL

and inductivity of your motor are specified. For further information, including a formula and description how to calculate the maximum voltage for your setup, refer to 5.8.2.3

COIL

(RMS)

L (min.)

VS (max.)

5.0 A

0.75 mH

75 V

0.48 mH

48 V

0.24 mH

24 V

4.0 A

0.94 mH

75 V

0.6 mH

48 V

0.3 mH

24 V

3.0 A

1.25 mH

75 V

0.8 mH

48 V

0.4 mH

24 V

2.0 A

1.875 mH

75 V

1.2 mH

48 V

0.6 mH

24 V

1.0 A

3.75 mH

75 V

2.4 mH

48 V

1.2 mH

24 V

0.5 A

7.5 mH

75 V

4.8 mH

48 V

2.4 mH

24 V

0.3 A

12.5 mH

75 V

8 mH

48 V

4 mH

24 V

Table 5.1: Maximum voltage regarding motor current and inductivity

Page 13

IDX Manual (V1.15 / September 26th, 2008) 13

0,3 0,8 1,3 1,8 2,3 2,8 3,3 3,8 4,3 4,8

ICOIL /A

L /mH

75 V 48 V 24 V

Figure 5.1: Maximum voltage regarding motor current and inductivity

Any combination of motor coil current and inductivity which is above the curve for maximum supply voltage (VS) is possible to drive the motor in this mode.

0,5

1,5

2,5

1 1,5 2 2,5 3 3,5 4 4,5 5

ICOIL /A

L /mH

Check your motor data sheet, please. If in doubt, please start with a lower supply voltage and check motor heating when raising the voltage.

Page 14

IDX Manual (V1.15 / September 26th, 2008) 14

5.2 Connecting Motor and Power Supply

Power supply

IDX

keep distance

short

Figure 5.2: Connecting Motor and Power Supply

5.3 Power Supply Requirements

The power supply voltage shall be in the limits as given in the chapter 4 under operational ratings. Please note that there is no protection against reverse polarity or too high voltage. The power supply typically should be within a range which fits the motor requirements, as described in chapter 5.1.1. When using supply voltages near the upper limit, a regulated power supply becomes a must. Please ensure, that enough power filtering capacitors are provided in the system (1000µF for each ampere of RMS motor current or more recommended), in order to absorb mechanical energy fed back by the motor in stalling conditions. In larger systems a zener diode circuitry might be required, when motors are operated at high velocities.

The power supply should be designed in a way, that it supplies the nominal motor voltage at the desired maximum motor power. In no case shall the supply value exceed the upper / lower voltage limit. To ensure reliable operation of the unit, the power supply has to have a sufficient output capacitor and the supply cables should have a low resistance, so that the chopper operation does not lead to an increased power supply ripple directly at the unit. Power supply ripple due to the chopper operation should be kept at a maximum of a few 100mV.

Therefore we recommend to

a) keep power supply cables as short as possible b) use large diameter for power supply cables c) if the distance to the power supply is large (i.e. more than 2-3m), use a robust 4700µF (IDX

7505) or 2200µF (IDX) or similar additional filtering capacitor located near to the motor driver unit. Choose the capacitor voltage rating fitting to the maximum operating voltage.

The overall power rating mainly depends on the motor used and on the mechanical output power, i.e. the motor velocity and desired torque. As a thumb rule, a 42mm class motor will require a 10W (short motor) to 20W (long motor) power supply, while a 57mm motor will require 15W to 30W, when operated at maximum rated current and low velocities. Operation at very high velocities will increase the power demand up to the double value.

Page 15

IDX Manual (V1.15 / September 26th, 2008) 15

5.3.1 EMV considerations

Due to the small form factor of the unit, it is not completely protected against electromagnetic emissions resulting from switching operation. If your system is subject to CE testing and shows EMV problems, i.e. due to some parts of the housing/cabling not being shielded, provide ferrite filters for the positive power supply line and for the motor outputs near to the unit. A 470pF to 1nF (100V) capacitor to GND then should be added externally to each ferrite filter.

5.4 Connections for Step / Direction- Mode

The step-direction-mode is enabled if the acceleration is set to 0 (default) using the RS485 interface. The example input signals of Figure 5.3 are schematically (see chapter 4.2 for more information):

Dir

Common

Disable

Step

PWR 12...50 V

TMCM-IDX

5 ... 24 V

Dir

Common

0 V

rotating direction

Disable

Common

0 V

rotation on off

at Vcommon or left open

Step

Common

0 V

Velocity Deceleration Acceleration

const.

Figure 5.3: Contacts for Step-Direction

The maximum step frequency is 350 kHz (limited by the opto couplers).

5.5 Connections for RS485 Interface

The RS485-mode allows for configuration of motor parameters as well as remote control of the motor.

5.5.1 Interface installation

To connect the module to a PC a RS485 interface is required, for example TRINAMIC’s new USB-2-485 or any other RS485 adapter, like the standard RS232 to RS485-converters. Input A has to be connected to RS485A of the IDX and Input B with RS485B.

TMCM-IDX

RS-232-port

USB-port

Terminal

alternative

RS232toRS485

4 3 2 1

USB

RS485

+ -

Either use a RS232 to RS485 or alternatively

a USB to RS485 adapter

Figure 5.4: Contacts for RS485 with an adapter

Page 16

IDX Manual (V1.15 / September 26th, 2008) 16

5.5.2 Control with terminal program

Having installed the hardware, the IDX can be controlled with any terminal program, like HyperTerminal that comes with MS-Windows. Following steps are described for HyperTerminal but are similar for the other terminal programs:

1. Start HyperTerminal

2. A window for a new connection opens. Fill in a name and press OK.

3. Select the appropriate COM-port and press OK.

4. Fill in the values like in Figure 5.5 and confirm with OK.

Bit rate:

Data bits:

Parity:

Stop bits:

Flow control:

none

Figure 5.5 : Connection settings for RS485

Type into the terminal window commands like “AV 50000”, “AA 300” or “Ac” and execute each with ENTER. Pay attention to the spaces between command and value. With standard RS485 adapters the typed value may be echoed and lines like AAVV 5500000000 for the typed AV 50000 appear. If this happens best is to pay no attention to the screen and just type in the commands and press ENTER. The value sent to the module is only the typed and not the displayed. An acceleration differing from zero is required to get velocities in RS485 mode. Setting or storing this value to the EEPROM disables step/direction control until acceleration is set to zero again (and eventually stored) or the board is reset to factory default.

Page 17

IDX Manual (V1.15 / September 26th, 2008) 17

5.6 Functional Description

The IDX module has three different modes to control a stepper motor: step-direction, RS485 and stand alone. With the RS485 it is possible to change parameters and save them to the EEPROM of the module to have all options in any mode. Therefore there are different settings like microstep resolution possible in step-direction mode also.

TMCM-IDX

12..50V DC

12..75V DC

Step/Dir

programmable

Motion

Controller

RS-485

Driver

TMC249

5V Power Supply

Step

Motor

MOSFET

Driver Stage

Opto isolation

Figure 5.6: Main parts of the TMCM-IDX

5.7 Disable Function

Description: The disable works as an emergency shutdown. Connected to ground all power to the

motor will shut down independent of the current settings. It is in the users responsibility to stop the step impulses or set the velocity to zero before enabling the motor again, because it would start abrupt otherwise.

Function Table:

OPTON

open wire

OPTOFF

motor disabled

motor enabled

5.8 RS485 Control Interface

The RS485 interface can control all functions of the IDX. It is possible to change parameters, with this interface which are also valid in the other modes like max. velocity or acceleration. The parameters can be written to the EEPROM to obtain the changes after a restart.

A Reset to factory default is possible. Default address byte is “A” and default baud rate is 9600 baud.

This mode can only be used with an appropriate RS485 interface. Commands are sent with a terminal program, refer 5.5.

Page 18

IDX Manual (V1.15 / September 26th, 2008) 18

5.8.1 RS485 Commands

For RS485 commands write the address byte (default is A) first, followed by an command from the following list. A small command letter provides the actual setting. All values are ASCII.

Command

Function

Description

Range

Factory Default

A, a

Acceleration

Acceleration: v = 28.96 * a

0..2500000

C, c

Set Motor Current

Motor current in percentage of maximum current (0..100% * IDX max. current). Refer 5.8.1.2

0..100

Failure readout

Provides failure readout. Refer 5.8.1.3

8 Bit (SPI)

1 Bit (others)

G, g

StallGuard

In mode 0 (SPI) the StallGuard feature is

functional. ‘g’ provides the actual StallGuard

value, not the setting. Refer 5.8.1.4

-7..0..+7

L, l

Limit switch

Used to switch on and off reference run values. Refer 5.8.1.5

byte

M, m

Select Mode

Select chopper mode: 0:SPI (default), 1:PWM, 2:PHASE, 3 & 4: Combinations, Refer 5.8.2

0, 1, 2, 3, 4

O, o

Set Output

Output adjustments, Refer 5.8.1.6

2 bit

Set Position

Set position without moving the motor

32 bit

Read I/Os

Provides out of the I/O the values of the ports GPI, REF_A, REF_B, GPO and ALARM. Refer

5.8.1.7

Read Current Position

Provides the current position of the motor

32 bit

Changes address byte

Capital letter followed by the command ‘S’

makes this letter the new address byte Example: “SB” makes “B” the new address byte

T, t

RS485Timeout

Sets the RS485-Timeout

U, u

Set baud rate

Sets baud rate for RS485 communication. Refer to 5.8.1.8

0…7

V, v

Velocity for Rotation

Velocity for rotation / reference run v = n * 0.149157 usteps/s Additional Parameter is 0 or missing: Carriage Return (CR) comes after acceleration phase Additional Parameter is 1: no delay of CR

+/- 2500000,

0 or 1

Store parameters to EEPROM

Stores different parameters to the EEPROM to restart with the same performance. Refer

5.8.1.9

Version number

Provides version number of implemented Software

Y, y

Standby current

Sets 0..100% of maximum current after 1 second motor inactivity. For no standby

current use the same value as for “Set motor current”.

0..100

Z, z

Microstep Resolution

Sets the maximum microstep resolution (0: max; 6: min), Refer 5.8.1.11

0..6

Table 5.2: RS485 Commands

Page 19

IDX Manual (V1.15 / September 26th, 2008) 19

Examples:

1. Set chopper mode to SPI Mode:

AM 0 ENTER

2. Read out the actual mode Am ENTER

5.8.1.1 Examples for test move

Different accelerations and velocities

AA 500, AV 50000, AV –50000 try other AA 100…8000, AV 0…400000

Max. current – test of torque

AA 500, AV 50000, AC 255 test torque manually AC 50 test torque

Read and set position

AR, AP 0, AR, AA 500, AV 50000, AR

5.8.1.2 Motor Current (C)

The motor current can be set by the user. To do this use the RS485 command “AC” in addition with a percent value. To calculate the actual setting, please use the 100% values as shown in the table. Internally the current is regulated by two independent parameters for the best module/motor performance possible. For chopper mode 2, the maximum setting is about 75% to 90% - at higher settings, motor microstep behaviour may become harsh. The actual maximum depends upon the actual motor. This is to avoid the motor coil current raising above the 100% setting at any time. Not all currents can be continuously driven at all supply voltages / cooling circumstances. Please refer to motor current limitations.

COIL,PP

IDX 7505

COIL,RMS

IDX 7505

COIL,PP

IDX

COIL,RMS

IDX

% to max.

COIL

100

7.1A

5.0A

4.8A

3.4A

100% *)

5.3A

3.8A

3.6A

2.6A

75%

4.7A

3.3A

3.2A

2.2A

66%

3.5A

2.5A

2.4A

1.7A

50%

2.4A

1.7A

1.6A

1.1A

33%

1.8A

1.26A

1.2A

0.85A

25%

0.71A

0.50A

0.5A

0.35A

10%

Table 5.3: Motor Current Examples for IDX

*) Not possible for chopper mode 2.

5.8.1.3 Failure Readout (E)

The IDX provides a full driver failure analysis in SPI mode (8 Bit). The returned bit assignments are as follows:

Bit

Name

Function

Remark

Overtemperature

“1” = driver chip off due to overtemperature

OTPW

temperature prewarning

“1” = driver chip prewarning temperature exceeded

driver undervoltage

“1” = undervoltage on VS – does not cover all cases

OCHS

overcurrent high side

(not available in current hardware implementation)

OLB

open load bridge B

Open load detection can occur at fast motion also.

OLA

open load bridge B

Open load detection can occur at fast motion also.

OCB

overcurrent bridge B low side

Short circuit detected. Please check motor wiring.

OCA

overcurrent bridge A low side

Short circuit detected. Please check motor wiring.

Table 5.4: Failure readout in SPI mode

Page 20

IDX Manual (V1.15 / September 26th, 2008) 20

In the other two modes the failure analysis consists of only one bit:

1: short circuit or overtemperature 0: no failure

5.8.1.4 StallGuard (G)

The StallGuard feature is available in the default mode 0 (SPI) only. It is a sensorless load measurement and stall-detection. Overload is indicated before steps are lost. The command letter ‘g’ provides the actual StallGuard value of the motor so easy calibration is possible. To use StallGuard in an actual application, some manual tests should be done first, because the StallGuard level depends upon the motor velocities and on the occurrence of resonances. When switching on StallGuard, the motor operation mode is changed and microstep resolution may be worse. Thus, StallGuard should be switched off when not in use.

Value

Description

-7..-1

Motor stops when StallGuard value is reached and position is set zero (useful for reference run).

StallGuard function is deactivated (default)

1..7

Motor stops when StallGuard value is reached and position is not set zero.

Table 5.5: StallGuard

The StallGuard function can also be activated when using step/direction mode. In step/direction mode the motor will not be stopped when the StallGuard value is reached, but the general purpose output will be controlled by the StallGuard value: when the actual load value is greater than the StallGuard value, the GPO will be switched on, and when the actual load value is lower or equal to the StallGuard limit, the GPO will be switched off. This can be used to signal a stall to the step/direction controller. When the StallGuard function is de-activated (0, default) the GPO will not be changed by StallGuard.

5.8.1.5 Limit Switch (L)

The parameter ‘L’ defines the different reference entrances of the module. The motor stops when the

defined position is reached.

Bit

Motor stops at

REF_B = 0

REF_A = 0

GPI = 0

REF_B = 1

REF_A = 1

GPI = 1

0: soft stop, 1: hard stop

0: sets position zero 1: sets position not to zero

Table 5.6: Limit switch

To activate a reference switch set the appropriate bit to 1. When motor stops the position counter is set to zero.

Example: AL 8 ENTER : Activates REF_B = 1. When destination reached motor stops and position counter is

set to zero.

Page 21

IDX Manual (V1.15 / September 26th, 2008) 21

5.8.1.6 Output setting (O)

The bit settings are as follows:

Bit

Description

0: GPO is inactive (LED off)

1: GPO is active (LED on)

1: Output is changed at end of reference run

Table 5.7: Output adjustment

Figure 5.7: GPO wiring scheme

5.8.1.7 I/Os Readout (Q)

Command:

AQ ENTER

Bit

7 6 5 4 3 2 1 0 Port

0 0 0

GPI

REF_B

REF_A

GPO

ALARM

Table 5.8: I/Os Readout

5.8.1.8 Baud Rate (U)

The parameter ‘U’ changes the baud rate of the module for RS485 communication.

Parameter U

Baud rate

9600 baud

14400 baud

19200 baud

28800 baud

38400 baud

57600 baud

76800 baud

115200 baud

Table 5.9: Baud rate

Page 22

IDX Manual (V1.15 / September 26th, 2008) 22

5.8.1.9 Velocity Mode (V)

The velocity mode allows rotation of the motor without external signals. In order to rotate the motor, please set an acceleration value different from zero. The velocity is given by the following equation, when parameter “AV n” is used:

]s/rotations[

motorofFullstepsresolutionMicrostep

149157.0n

]s/rotations[v

]s/steps[

resolutionMicrostep

149157.0n

]s/steps[v

]s/microsteps[149157.0n]s/microsteps[v

For a 200 step motor at 64 microsteps, this gives

]s/rotations[

85815

]s/rotations[v

A practical limit with most stepper motor types is about 20 rotations / second in chopper mode 0 and 5 rotations / second in chopper mode 2.

As a second parameter, value “0” or “1” is optional. Standard is 0 and sends back the Carriage Return

character at once. If it is set to “1” sending back of the Carriage Return character is delayed until the

target velocity is reached.

Example: AV –50000 ENTER: Accelerates motor to given velocity AV 0 1 ENTER: Accelerates motor to velocity zero (standstill) and delays echoing of carriage

return until target velocity has been reached

5.8.1.10 Store Parameters to EEPROM (W)

This command stores the actual parameters to the EEPROM to restart with the same performance after power down. Stored parameters are:

Current setting (set by command C) Selected Mode (set by command M) Output adjustment (set by command O) RS485 parameters (set by command U) Microstep resolution (set by command Z)

Example: AW ENTER: All actual parameters from list above are stored to EEPROM.

Page 23

IDX Manual (V1.15 / September 26th, 2008) 23

5.8.1.11 Microstep Resolution (Z)

The microstep resolution can be set by the user. It depends on the maximum resolution witch differs in the three different chopper modes (see 5.8.2). The maximum resolution is set by the parameter ‘Z’.

Parameter Z

Microstep resolution

SPI

PWM

Phase (default)

max resolution

64 *)

256

1/2 max

32 **)

128

1/4 max

1/8 max 8 8

1/16 max

4 4 16

Table 5.10: Adjustment of Microstep Resolution

*) Simulated microsteps, the actual microsteps of the motor are not improved compared to Z = 1. **) Simulated microsteps, the actual microsteps are improves but do not reach 32 microsteps.

Example:

AZ 2 ENTER : Sets the microstep resolution to a quarter of the maximum resolution.

5.8.2 Chopper Modes

5.8.2.1 Chopper Mode 0 (SPI) / Default Mode

In this mode, the motor coil current is regulated on a chopper-cycle-by chopper-cycle bias. This is the standard operation mode for most motor drivers. It brings a medium microstep resolution of 16 microsteps and typically works good with most motors and a high range of supply voltage and motor current settings. A resolution of up to 64 microsteps can be simulated but the motor precision is only slightly improved compared to 16 microsteps and the same as with 32 microsteps.

The maximum supply voltage (VS) of the motor must not exceed 22-25 times the nominal motor voltage (VN), regarding the multiplication of I

COIL, MAX

and R

MOTOR

. A higher value would lead to an excess of motor rating. The minimum supply voltage has to be above two times the nominal motor voltage.

MOTORMAX,COILN

NSN

RIV

V25...22VV2

It uses a chopper frequency of about 36kHz.

Page 24

IDX Manual (V1.15 / September 26th, 2008) 24

5.8.2.2 Chopper Mode 1 (PWM)

This mode is identical to the chopper mode 0 (SPI) mode, but it increases the microstep resolution at low velocities / stand still.

MOTORMAX,COILN

NSN

RIV

V25...22VV2

5.8.2.3 Chopper Mode 2 (PHASE)

This mode uses a different chopper scheme, which provides a very high microstep resolution and smooth motor operation. However motor dynamics and maximum velocity are quite limited. Care has to be taken concerning the selection of motor and supply voltage: The motor is chopped with 20kHz, and the coil sees a 50% duty cycle at full supply voltage when the coil current is meant to be zero. This is only true for the average, but the motor still sees an alternating current and thus an alternating magnetic field. Now, care has to be taken in order to keep this current to a value which is significantly lower than the motor maximum coil current. If it is too high, the motor has significant magnetization losses and coil power dissipation, and would get much too hot, even with zero average current. The only possibility to limit this effect, is to operate with a comparatively low supply voltage. The following calculation is based on the assumption that full motor current is set.

Check list:

Please take the motor inductivity L [mH] and motor rated full step coil current I

COIL

[A] from the motor’s data sheet: Now choose a supply voltage for the module to fulfil the following comparison:

5.0I

s25V

COIL



mHL20IV

COILS

If your parameters do not fulfil the equation, i.e. you calculate a supply voltage which is below the modules’ operation specs or which does not fit your system requirements, try the following:

Calculate x:

mHL

025.0

COIL

If x is below 0.5, everything is OK. If x is in the range 0.5 to 1.0, try operating your motor and check if motor or driver gets too hot. If x is above 1.0, choose one of the other chopper modes.

See also 5.1.1.3 for graphical demonstration.

Page 25

IDX Manual (V1.15 / September 26th, 2008) 25

5.8.2.4 Chopper mode 3 (Phase and SPI)

This mode combines the modes 2 (Phase) and 0 (SPI) in order to provide highest accuracy at lower velocities and also the possibility for faster movements. Through the switching between modes some microsteps may be lost. Microstep resolution must not be higher than 64. It is set according to Phase mode, so possible values for Z (microstep resolution) are 2, 3 or 4.

µ-steps

Phase to SPI

SPI to Phase

V-value

Rounds/s

V-value

Rounds/s

192000

2.24

25000

0.29

96000

2.24

12500

0.29

48000

2.24

6250

0.29

Table 5.11: Chopper mode 3 switching velocities

Conversion of values above to motors with different fullstep resolutions:

revolutionperfullstepsmotors

200

)s/rounds(v

table

motor

5.8.2.5 Chopper mode 4 (PWM and SPI)

This mode combines the modes 1 (PWM) and 0 (SPI) in order to provide higher accuracy (up to 64 microsteps) at lower velocities and also the possibility for faster movements. For higher velocities in SPI mode the microstep resolution is always 16, but set resolution is simulated. Through the switching between modes some microsteps may be lost. Microstep resolution must not be higher than 64. It is set according to Phase mode, so possible values for Z (microstep resolution) are 2, 3 or

4. This mode should only be used in very special occasions and mode 3 should be preferred if a combination of high accuracy at slow movements and high speed is needed.

Page 26

IDX Manual (V1.15 / September 26th, 2008) 26

5.9 Step / Direction

Additional Parameters can be set by RS485 i.e. to set a maximum velocity or microsteps per round.

The Step-Direction controls are as follows:

Motor

Velocity

Acceleration

Rotate right

Rotate left

Control

Step frequency

Increase of Step

frequency

Direction open

wired or

connected to V

COM

Direction

connected to

Ground

Table 5.12: External signals and motor reactions

Motor

Speed

Step

com

0 V

Disable

com

0 V

Velocity Deceleration Acceleration

rotating on off

const.

Direction

com

0 V

rotating direction

rotate left

rotate right

Figure 5.8: Step-Direction signals and motor reactions

5.9.1 Direction

Description: The Direction signal changes the motors rotation from clockwise (CW) to

counterclockwise (CCW) and vice versa.

Function Table:

GND

open wire

COM

= 5…24V

motor CW

motor CCW

Page 27

IDX Manual (V1.15 / September 26th, 2008) 27

5.9.2 Step

Description: The Step signal controls the velocity and acceleration of the motor. The velocity depends

on the frequency, the acceleration on the change of the frequency. One step impulse represents one microstep. Calculation of rotations per second (refer to 5.8.1.11):

]s/rotations[

resolutionMicrostepFullsteps

frequencyinputStep

]s/rotations[v

Frequency: The maximum Step input frequency is 350 kHz, aligned to the Direction signal. The

minimum logic ”0” time is 0.7 µs and the minimum logic “1” time is 2.0 µs. A step is triggered by the positive going edge of the signal (switching off of opto coupler). Maximum frequency at a duty cycle of 1 (“0” time is 2.0 µs and “1” time is 2.0 µs) is 250 kHz.

Function Table:

Extern

GND

open wire

COM

= 5…24V

Intern

HIGH

LOW

step pulse

direction

0.7µs min

2.0µs min

0.7µs min

DIRHOLD

DIRSETUP

Figure 5.9: Step and Direction Signal

5.10 Reset to factory default

If the module seems to function weird this could usually is caused by unintended settings. In this case a reset to factory default might be useful. To do this switch off the module and short-circuit pin 1 and pin 3 of the free contacts for a 6-pin connector on the backside of the module. See Figure 5.10. Turn on the module and switch it off again to remove the short-circuit. All settings are now at factory default.

pin 1

(quadratic)

pin 3

Figure 5.10: Reset to factory default

Page 28

IDX Manual (V1.15 / September 26th, 2008) 28

5.11 Firmware Update

For Firmware update start the program TMCM013boot.exe contained in the IDX-Folder of your TMCTechLibCD or at www.trinamic.com:

Figure 5.11: Firmware update tool

1. Choose your RS485 connection.

2. Select your Module ID (default is A).

3. Load the new firmware file (e.g. IDX_V1.08.hex), to download from www.trinamic.com.

4. Start the update process.

At the end of the update process check your firmware version with command “AX”.

Page 29

IDX Manual (V1.15 / September 26th, 2008) 29

5.12 Option: Pseudo DC-Motor mode (not supported by

software yet)

The velocity of the motor in this mode is changed through a constant voltage at the General Purpose input. The operational voltage is 7...48V. This option may be available in a future firmware version.

5.12.1 Setting up the module

It is advised to connect an external voltage divider to the GPI pin, as depicted.

Figure 5.12: GPI wiring scheme

However, there are two free places for 0805 SMD resistors to be equipped directly on the module IDX. To enable this mode solder use resistors as follows:

Attention: Do not try to make changes on the board until you are absolutely sure.

be absolutely sure before

making changes on board:

GND

R = 120k

R = 2.2k

GPI

7V...V

ATM

168

D D D

T T

connector RM 3.5

mounting hole

free Pads for 2.2k and 120k

Figure 5.13: Layout Changes for DC-Motor option

5.12.2 Parameterizing with RS485

First set Parameters for minimum voltage, maximum voltage and a zero point in between. Other values can be changed also like max. acceleration, max. velocity, microsteps,… Before enabling this mode with the RS485 command … connect a voltage of 7…48V to General Purpose Input (GPI). The voltage has to exceed zero point voltage before the regulation works.

5.12.3 Motion Control

Change the voltage at GPI between 7…48V. The motor will accelerate and decelerate relative to the

specified zero point. Additional parameters like resolutions of microsteps can be stored in the EEPROM.

Page 30

IDX Manual (V1.15 / September 26th, 2008) 30

6 Revision History

6.1 Documentation Revision

Version

Comment/Date

Author

Description

1.00

First Release

Full functionality for Firmware V1.05

1.01

Limit switch

Added limit switch to documentation

1.02

Additions

StallGuard added with RS485 command ‘G’, formerly used for output setting (LED) now command ‘O’. Switched default mode to

SPI.

1.04

Updates

Added / modified some details

1.05

Updates

RS485 connection documentation revised

1.06

Updates

Corrected current default value, included IDX 7505 information

1.07

Updates

Modes 3, 4 and GPO, GPI wiring scheme included

1.08

Updates

Firmware update included

1.09

Corrections

Step / direction timing

1.10

Corrections

5.1.1.3 Chopper Mode 2 – Inductivities, 5.8.1.11 Microstep Resolution

1.11

Update

EMV / optocoupler reverse voltage

1.12

New style

1.13

Nov 7, 2007

Ground plate height has changed from 3mm to 2.5mm (see 3.2)

1.14

Nov 28, 2007

RS485 command ‘W’ clarified, Figure 5.3 corrected (disable)

1.15

Sep 16, 2008

New feature of firmware 1.12 added

Table 6.1: Documentation Revisions

6.2 Firmware Revision

Version

Comment

Description

Pre 1.07

Please update

1.07

First Release

Full functionality (except DC-Motor) with some possibilities to expand

1.08

Bug fix, new

options

Added chopper modes 3 and 4, modified V command, corrected RS485 bug (always echoing of CR at earlier versions)

1.09

Bug fix

‘E’ command corrected (output was shifted by four bits)

1.10

New options

‘X’ command can also be iven as a lower case letter Option 2 for command ‘O’ added

Mixed decay automatically disabled when StallGuard enabled Mixed decay can be disabled without turning on StallGuard using G8

1.11

Improvement

StallGuard improved by filtering

1.12

New option

StallGuard also usable in step/direction mode (controls GPO then)

Table 6.2: Firmware Revisions