HEIDENHAIN PWM 20 User Manual
User's Manual
ATS Software
PWM 20 (IK 215)
Software
539862-23
Version 3.0.xx
11/2014
1 General information .............................................................................................................. 5
1.1 How to Use this Manual.................................................................................................. 5
1.2 Safety precautions........................................................................................................... 6
1.3 Information on the IK 215 adjusting and testing package ............................................... 7
1.4 IK 215 adjusting and testing package (ID 547858-xx); items supplied ............................ 8
1.5 Information on the PWM 20 encoder diagnostic kit, ID 759251-xx................................. 9
1.6 PWM 20 basic kit, ID 731626-51; items supplied ........................................................... 9
1.7 PWM 20 encoder diagnostic kit, ID 759251-01; items supplied ................................... 10
2 Optional cables and pin layouts ........................................................................................ 11
2.1 Optional cables and adapters ....................................................................................... 11
2.2 Scope of functions of the ATS software 3.0 ................................................................. 12
3 Commissioning .................................................................................................................... 13
3.1 System requirements.................................................................................................... 13
3.2 Description of the hardware.......................................................................................... 13
3.3 Installing the ATS Software........................................................................................... 14
3.4 Uninstalling the ATS software....................................................................................... 14
3.5 Calibration...................................................................................................................... 15
3.6 Configuration ................................................................................................................. 16
3.6.1 Configure hardware ............................................................................................. 17
3.6.2 Language selection .............................................................................................. 18
3.6.3 Manage product keys .......................................................................................... 19
3.6.4 Display of software and database versions ......................................................... 22
3.6.5 Finding documentation (Help files) of the ATS software ..................................... 22
3.6.6 Updates of the ATS help files (PDF file) .............................................................. 23
4 Identifying encoder output signals (encoder interfaces) ................................................. 25
4.1 Incremental interfaces................................................................................................... 25
4.2 Absolute interfaces........................................................................................................ 26
5 Software description ........................................................................................................... 27
5.1 Operational design......................................................................................................... 27
5.2 Setting up a connection to the encoder ........................................................................ 28
5.2.1 Feed-through mode ............................................................................................. 30
5.2.2 Automatic encoder identification by entering the ID ........................................... 34
5.2.3 Manual encoder selection .................................................................................... 38
5.3 Basic functions .............................................................................................................. 45
5.3.1 Position display .................................................................................................... 46
5.3.2 Incremental signal display .................................................................................... 70
5.3.3 Display encoder memory ..................................................................................... 78
5.3.4 Comparing contents of encoder memories ......................................................... 88
5.3.5 Voltage display ..................................................................................................... 91
5.4 Add-on info (EnDat 2.2): Temperature display............................................................... 93
5.5 Diagnostics.................................................................................................................... 95
5.5.1 Absolute/incremental deviation ........................................................................... 95
5.5.2 Online diagnostics ............................................................................................... 99
5.6 Testing Functional Safety ............................................................................................ 109
5.6.1 Test of forced dynamic sampling ....................................................................... 112
6.2 Test for consistency .......................................................................................... 114
5.
5.6.3 Test by comparison of position values 1 and 2 .................................................. 117
5.7 Supported interfaces ................................................................................................... 122
5.7.1 SSI, SSI programmable ...................................................................................... 122
5.7.2 Fanuc ................................................................................................................. 124
5.7.3 Mitsubishi .......................................................................................................... 126
5.7.4 Indramat (I2C) .................................................................................................... 127
5.7.5 DRIVE-CLiQ ....................................................................................................... 130
5.7.6 Yaskawa serial interface .................................................................................... 144
5.7.7 Panasonic serial interface .................................................................................. 145
6 Checking incremental encoders ....................................................................................... 147
6.1 General information..................................................................................................... 147
6.2 Analog output signals.................................................................................................. 147
6.2.1 Connecting the encoder .................................................................................... 147
6.2.2 Checking incremental signals ............................................................................ 148
6.2.3 Description of the incremental signal display .................................................... 151
6.2.4 Checking the reference signal (1 Vpp / 11 µApp) .............................................. 162
6.2.5 Zoom function for oscilloscope ......................................................................... 166
6.2.6 Recording function ............................................................................................ 167
6.2.7 Counter function ................................................................................................ 174
6.2.8 PWT test function .............................................................................................. 181
6.2.9 Checking a commutation encoder with Zn and Z1 track (e.g. ERN 1387) ......... 185
6.2.10 Checking homing/limit signals ......................................................................... 191
6.3 Digital TTL/HTL square-wave output signals .............................................................. 195
6.3.1 General information ........................................................................................... 195
6.3.2 Explanation of the display .................................................................................. 197
6.3.3 Level function Bar of oscilloscope settings, TTL ............................................ 198
6.3.4 Level function Oscilloscope display, TTL ........................................................ 199
6.3.5 Level function Bar graph display, TTL level .................................................... 201
6.3.6 Logic function, TTL ............................................................................................ 202
6.3.7 Logic function, bar graphs ................................................................................. 204
6.3.8 Counter function ................................................................................................ 206
6.4 Mounting wizards........................................................................................................ 208
6.4.1 General information ........................................................................................... 208
7 Interface description.......................................................................................................... 209
7.1 General information..................................................................................................... 209
7.2 Analog interfaces ........................................................................................................ 209
7.2.1 Incremental signals11 µApp .............................................................................. 209
7.2.2 Incremental signals 1 Vpp ................................................................................. 212
7.2.3 Incremental signals1Vpp with commutating signals ......................................... 215
7.3 Square-wave interfaces............................................................................................... 216
7.3.1 Incremental signals TTL square-wave interface ............................................... 216
7.3.2 Incremental signals HTL (HTLs) square-wave interface .................................... 219
7.4 Absolute interface ....................................................................................................... 222
7.4.1 EnDat ................................................................................................................. 222
7.4.2 Synchronous serial interface; programming via connector ................................ 235
7.4.3 SSI synchronous serial interface with programming interface
(older rotary encoders) ...................................................................................... 238
7.4.4 Company-specific interfaces ............................................................................. 242
8 Contacts.............................................................................................................................. 243
8 Your HEIDENHAIN helpline............................................................................................ 243
8 The HEIDENHAIN technical helpline .............................................................................. 243
8 HEIDENHAIN Helpline for
repairs, spare parts, exchange units, complaints and service contracts ....................... 243
8 Technical training............................................................................................................ 243
1 General information
Note
Note
Attention
DANGER
Note
Note
1.1 How to Use this Manual
About this manual
Update service This service manual is regularly updated.
Explanation of the symbols
This manual refers to the ATS Adjusting and Testing Software Version 3.0.xx,
ID 539862-23.
The ATS software is executable on the following hardware:
PWM 20 ID 731626-01 and
PC expansion board IK 215 ID 386249-xx
The current (printable) version is available on the Internet in PDF format: www.heidenhain.de
Printed copies are only distributed to the participants of our service training courses and are
enclosed with new test units.
Symbols represent the type of information.
E.g., reference to more detailed information in another chapter.
E.g., indication of error messages that may be displayed or repetition of program steps.
E.g., information that incorrect operation may cause the danger of electrical shock or lead to
the destruction of components.
Other documentation
Target group The activities described in this manual may only be performed by specialists for service,
Screen displays
For more information please refer to the following documentation:
HEIDENHAIN User's Manual Cable and Connection Technology
Documentation of the machine tool builder
Interfaces of HEIDENHAIN encoders
Mounting instructions of the encoders
Encoder brochures (www.heidenhain.de)
maintenance and commissioning who have profound knowledge of electronics, electrical
engineering and NC machine-tool technology.
Keep these instructions for later reference!
The screenshots and displays in these instructions depend on the encoder type connected
and on the product key. Thus, they may differ from your testing situation.
The images only serve as examples!
November 2014 General information 5
1.2 Safety precautions
Note
Attention
DANGER
Note
Observe the safety precautions in the PWM 20 Operating Instructions (ID 1125089-90).
Observe the safety precautions below to avoid injury or damage to persons or products.
To avert potential dangers, only use the product in the manner described!
Before you integrate the test units into the position control loop of an NC controlled
machine tool make sure that
1. the machine is switched off!
2. all connectors are disengaged!
Observe the ESD precautions!
Make sure that the connector contacts are clean!
3. Reestablish all required connections and secure them mechanically.
Make the required settings on the PWM.
Switch the machine and the control back on again.
Check whether the machine axis can be traversed in a controlled manner.
During the start-up phase of the machine, the emergency stop button must be accessible
in time.
Do not operate defective units!
No persons are permitted in the traverse range of the machine.
Do not change any parameters or encoder voltages at the test units while the machine tool
is moving and a test unit is connected to the position control loop!
Changed parameters must be reset to their original values.
Ensure that vertical axes cannot fall down!
The ATS software offers the possibility of storing and editing machine-specific or
equipment-specific information in the customer’s memory area. The data may comprise
safety-relevant information.
When servicing, please take care to adjust this memory area. Noncompliance with this
warning could result in damage to the machine or in personal injury.
When troubleshooting always contact the machine tool builder for information (e.g. meaning
of the data in the OEM memory).
Support is provided by HEIDENHAIN Traunreut or by the HEIDENHAIN agencies, see
"Contacts" on page 243.
6 HEIDENHAIN ATS Software User's Manual
1.3 Information on the IK 215 adjusting and testing package
Note
The IK 215 Adjusting and Testing Package serves to diagnose and adjust HEIDENHAIN encoders
with absolute interfaces.
The IK 215 adjusting and testing package comprises:
IK 215 interface card for installation in a PCI expansion slot of a personal computer
Adjusting and Testing Software (ATS)
with integrated local encoder database for automatic encoder identification
Standard adapter cables for common testing procedures
Other adapters and adapter cables are available (see table).
The PWM 20 with expanded scope of functions replaces the IK 215.
As compared to the PWM 20, the IK 215 does not support the following functions:
- Incremental interfaces (1 Vpp, 11 µApp, TTL, etc.)
- DRIVE-CLiQ from SIEMENS
- Measuring in feed-through mode
November 2014 General information 7
1.4 IK 215 adjusting and testing package (ID 547858-xx); items supplied
The packages 1 and 2 are included in delivery.
Package 1: ID 527367-01 Package 2: ID 658110-01
Package 1 + package 2: ID 547858-xx
Package 1 IK 215 ID 527367-01
Qty. Designation ID
1 IK 215 PCI board 386249-02
1 ATS CD ROM de/en software version 3.0.xx 539862-23
1 IK 215 Operating Instructions 549369-91
Package 2 PWM 20 / IK 215 accessories kit
for absolute encoders ID 658110-01
Qty. Designation ID
1 Benutzer-Handbuch ATS-Software PWM 20/IK 215 de 543734-xx
1 User’s Manual ATS Software PWM 20/IK 215 en 543734-xx
1 Adapter cable (with incremental signal) for IK input, 15/17-pin; D-sub/M23; 2 m 324544-02
1 Adapter cable for LC 18x scanning unit, 12/17-pin; 3 m 369124-03
1 Adapter cable for LC 48x scanning unit, 12/17-pin; 3 m 369129-03
1 Adapter cable for IK input, 15/8-pin; D-sub/M12; 2 m 524599-02
1 Adapter cable for LC xx3, LC xx5, LC 20x scanning unit, 14/17-pin; M12/M23; 3 m 533631-03
1 Adapter cable for RCN 82xx Ultra Lock, 12/17-pin; M12/M23 643450-03
8 HEIDENHAIN ATS Software User's Manual
1.5 Information on the PWM 20 encoder diagnostic kit, ID 759251-xx
Note
The PWM 20 encoder diagnostic kit serves to diagnose and adjust HEIDENHAIN absolute and
incremental encoders with absolute and incremental interfaces.
The PWM 20 encoder diagnostic kit comprises:
PWM 20 test unit for direct connection to a laptop/PC via USB interface
ATS Adjusting and Testing Software on CD with integrated local encoder database for
automatic encoder identification
Standard adapter cables for common testing procedures
Case for testing equipment
Other adapters and adapter cables are available (see table).
The PWM 20 test unit is available in three different variants (see tables below):
- PWM 20 basic kit
- PWM 20 basic kit including case (aluminum)
- PWM 20 basic kit including case (aluminum), set of standard adapter cables and
operating instructions
1.6 PWM 20 basic kit, ID 731626-51; items supplied
Basic kit: ID 731626-51
PWM 20 basic kit ID 731626-51
Qty. Designation ID
1PWM 20 731626-01
1 ATS CD ROM de/en software version 3.0.xx 539862-23
1 PWM 20 Operating Instructions 1125089-90
1 USB connecting cable, 2 m 354770-02
1 Power cable, 3 m 223775-01
1 PWM 20 packaging (cardboard box) 730058-01
November 2014 General information 9
1.7 PWM 20 encoder diagnostic kit, ID 759251-01; items supplied
The packages 1 and 2 are included in delivery.
Package 1: ID 759249-01 Package 2: ID 658110-01
Package 1 + package 2: ID 759251-01
Package 1 PWM 20 basic kit including case ID 759249-01
Qty. Designation ID
1PWM 20 731626-01
1 ATS CD ROM de/en software version 3.0.xx 539862-23
1 PWM 20 Operating Instructions 1125089-90
1 USB connecting cable, 2 m 354770-02
1 Power cable, 3 m 223775-01
1 Case for testing equipment 785241-01
Package 2 PWM 20 / IK 215 accessories kit for absolute encoders ID 658110-01
Qty. Designation ID
1 Benutzer-Handbuch ATS-Software PWM 20/IK 215 de 543734-xx
1 User’s Manual ATS Software PWM 20/IK 215 en 543734-xx
1 Adapter cable (with incremental signal) for IK input 15/17-pin; D-sub/M23; 2 m 324544-02
1 Adapter cable for LC 18x scanning unit, 12/17-pin; 3 m 369124-03
1 Adapter cable for LC 48x scanning unit, 12/17-pin; 3 m 369129-03
1 Adapter cable for IK input, 15/8-pin; D-sub/M12; 2 m 524599-02
1 Adapter cable for LC xx3, LC xx5, LC 20x scanning unit, 14/17-pin; M12/M23; 3 m 533631-03
1 Adapter cable RCN 82xx Ultra Lock 8/17-pin; M12/M23 643450-03
10 HEIDENHAIN ATS Software User's Manual
2 Optional cables and pin layouts
2.1 For optional cables and adapters as well as all pin layouts refer to the User's Manual "Cable and Connection Technology" ID 1117945-xx for PWM 20 (IK 215)!
This User's Manual can be downloaded from the HEIDENHAIN website, see:
www.heidenhain.de/Documentation and Information/Software/Download Area/Diagnostic Set/
PWM/Documentation.
November 2014 Optional cables and pin layouts 11
2.2 Scope of functions of the ATS software 3.0
12 HEIDENHAIN ATS Software User's Manual
3 Commissioning
Note
Note
Note
3.1 System requirements
IBM PC or 100 % compatible PC
Dual-core processor with a clock frequency > 2 GHz
RAM > 2 GB
Windows XP, Vista, Windows 7 and 8 (32 / 64 bits) operating system
Free space on hard disk > 200 MB
If these requirements are not met, this may lead to very slow data processing or even to
error messages of the ATS software, indicating that certain functions cannot be performed.
A computer with USB interface 2.0 and ATS software is required to run the PWM 20.
System requirements for PWM 20 and IK 215: see respective operating instructions.
3.2 Description of the hardware
The phase-angle measuring unit PWM 20 or the PCI interface card IK 215 are required to run the
ATS software.
The PWM 20 replaces the IK 215 entirely. PWM 20 + ATS V2.4 feature all functions of the
IK 215. Improvements of the ATS software functions are focused on the PWM 20. Certain
functions - such as inspection of incremental and DRIVE CLiQ interfaces, feed-through mode
and various mounting wizards - are only supported by the PWM 20.
For more information on specifications, supported interfaces, hardware installation,
etc., please refer to the respective commissioning instructions.
After using the device, attach the protective caps to protect the electronics and the
connector contacts from electrostatic charge and from contamination!
November 2014 Commissioning 13
3.3 Installing the ATS software
Note
A CD-ROM with the required software is among the items supplied. The current ATS software
can also be downloaded from www.heidenhain.de. The software is updated regularly.
To install the ATS software, insert the supplied CD into your CD-ROM drive or run the
"setup.exe" file downloaded from the Internet. Follow the instructions of the installation wizard.
If the setup wizard does not start automatically, please start "setup.exe" manually. Before you
start the installation, please read the Release Notes. After successful completion of the
installation, the icon of the ATS software appears on the desktop.
Installation sequence:
8 If you use the PWM 20, install the ATS software first.
8 Connect the PWM 20 to the laptop/PC with a USB cable.
8 Switch on the PWM 20. (You may be prompted to install the drivers.)
8 Start the ATS software.
The PCI card must be installed, if you use the IK 215.
8 Switch on the computer (you may be prompted to install the drivers) and start the ATS
software.
If you have downloaded the software from www.heidenhain.de, the device drivers are not
installed automatically. In this case, the testing device does not work, and the ATS software
generates an error message. Follow the instructions of the Windows operating system to
install the drivers by hand. You will find the required drivers in the folder 539862xx/FILES/
Drivers of the ATS software package.
3.4 Uninstalling the ATS software
The software can be uninstalled in different ways:
Start the ATS Uninstall Routine via the corresponding Windows button.
Via the "Control Panel" --> "Software" operating system function.
Restart the "setup.exe" of the ATS software; follow the installation wizard and
select the "Remove" option.
14 HEIDENHAIN ATS Software User's Manual
3.5 Calibration
Calibration label
on PWM 20
In general the PWM is maintenance-free, since it does not contain any components that are
subject to wear.
To ensure exact and correct operation we recommend that you send the PWM to the calibration
service of HEIDENHAIN Traunreut every two years.
Calibration date
Next recommended
calibration date
November 2014 Commissioning 15
3.6 Configuration
8 Start the ATS software.
8 Select the "Configuration" group.
In the "Configuration" group you can make the following settings:
Configure hardware
Language selection
Manage product keys
16 HEIDENHAIN ATS Software User's Manual
3.6.1 Configure hardware
Note
1 PCI bus number and the PCI device number of the installed testing device
2 Serial number of the testing device
This function scans the computer and lists the hardware that was found.
8 Select the desired testing device from the list.
8 Confirm with OK to return to the previous screen.
The serial number is required to generate a product key.
November 2014 Commissioning 17
3.6.2 Language selection
1 Select German or English
8 Set the operating language.
8 Confirm with OK to return to the previous screen.
18 HEIDENHAIN ATS Software User's Manual
3.6.3 Manage product keys
Note
In addition to the function groups and functions of the ATS software (see chapter “Incremental
interfaces” on page 25) HEIDENHAIN reserves additional special functions (e.g. for the
HEIDENHAIN Service) that can be activated by product keys.
The product key generated by HEIDENHAIN is linked to the serial number of the hardware.
The special functions cannot be transferred to other hardware by entering the product key!
1 Input box for product key
2 Serial number of the hardware
3 Display field for new optional function groups
Example: Entering a product key
An optional function is enabled by HEIDENHAIN Traunreut. The product key is generated and
sent by e-mail.
November 2014 Commissioning 19
8 Click "Add" to activate the product key.
Note
The "Add" key becomes active, when the correct code is entered. Input errors are reported
as error messages.
1 Serial number (SN) of installed PWM 20
2 <Delete
> removes the product key.
3 Active product-key options
20 HEIDENHAIN ATS Software User's Manual
8 Click "Close" to terminate product-key entry.
Note
The product-key functions only appear in the ATS main menu after the connection to the
encoder has been established.
November 2014 Commissioning 21
3.6.4 Display of software and database versions
To display the installed versions of the ATS software and the database proceed as follows:
3.6.5 Finding the documentation (Help files) of the ATS software
The documentation of the ATS software is available in the "Help" menu in PDF format.
22 HEIDENHAIN ATS Software User's Manual
3.6.6 Updates of the ATS help files (PDF file)
Note
The help files are updated for every software update (once a year) and are included in the
software package. If changes or corrections are required in-between, we make the updated
instructions available on our website www.heidenhain.de (Documentation and information /
Software) from where you can download them.
If you want to update one of the four help files of the ATS software, you have to rename the
"new" PDF file to the name of the previous file. (Example: If the name of the old document is
um.pdf, the new document must be renamed to um.pdf.)
In the program directory where there is the ATS software (example: hard disk C:/Programs(x86)/
HEIDENHAIN/ATS/doc/de or en), replace the existing PDF file by the file you have renamed. The
old file will be overwritten.
The names of the PDF help files (cct.pdf, i.pdf, oi.pdf and um.pdf) must always be the same
in both languages (de and en).
November 2014 Commissioning 23
24 HEIDENHAIN ATS Software User's Manual
4 Identifying encoder output signals (encoder interfaces)
Note
Note
4.1 Incremental interfaces
Determine interface from encoder designation
The identification of the interface type applies to standard HEIDENHAIN encoders.
Deviations from the designation structure are possible (in particular with customer-specific
encoders).
Other identifiers
A 9-pin M23 connector always means an 11 µApp interface.
Encoders connected to the encoder inputs of EXE interpolation electronics are always
11 µApp encoders.
Encoders connected to the encoder inputs of IBV interpolation electronics are always
1 Vpp encoders.
For encoders with D-sub connectors no conclusions can be made about the interfaces.
November 2014 Identifying encoder output signals (encoder interfaces) 25
4.2 Absolute interfaces
Encoders that have a 'C' or a 'Q' in their names use an absolute interface (EnDat or SSI).
There are EnDat encoders with and without incremental A/B sinusoidal signals.
The order designation indicates whether an encoder outputs incremental signals:
EnDat 21 without incremental signals
EnDat 22 without incremental signals
EnDat 01 with incremental signals A/B 1 Vpp
EnDat 02 with incremental signals A/B 1 Vpp
EnDat Hx with incremental signals HTL (as of 2014)
EnDat Tx with incremental signals TTL (as of 2014)
x designates: a = 2-fold interpolation
b = without interpolation
c = scanning signals x2
Also see "Interfaces of HEIDENHAIN Encoders“ brochure, ID 1078628-xx.
26 HEIDENHAIN ATS Software User's Manual
5 Software description
5.1 Operational design
The ATS software runs by a dynamic context menu. The function menu contains the function
groups that are available for the connected encoder. Depending on the encoder, the supported
function groups / functions are displayed.
Example:
LC 183 encoder connected and activated.
Function group "Diagnostics" with two active functions ("Absolute-incremental deviation" and
"Online diagnostics").
Explanation of the display
1 Selected function pointer (< )
2 Function group
3 Function
4 Connected encoder
5 ID number
6 Power supply symbol:
Encoder power supply OFF (green)
Encoder power supply ON (red)
November 2014 Software description 27
5.2 Setting up a connection to the encoder
Note
8 Connect the encoder to the test unit with an adapter cable.
Adapter cables: See User's Manual "PWM 20 Cable and Connection Technology".
This User's Manual can be downloaded from the HEIDENHAIN website, see:
www.heidenhain.de/Documentation and Information/Software/Download Area/Diagnostic
Set/PWM/Documentation.
8 Double-click "Connect encoder" in the ATS main menu.
The "Encoder selection" window offers two possibilities of powering the encoder and setting the
encoder interface:
1 Automatic encoder identification by entering the ID of the encoder (mandatory for absolute
encoders)
2 The manual settings are only used, if no encoder ID is available (ID plate missing or illegible;
encoder not in the ATS encoder database).
28 HEIDENHAIN ATS Software User's Manual
3 Select "Use power supply from subsequent electronics", if the PWM 20 is in feed-through
Note
Note
DANGER
Note
mode and supposed to be powered from the subsequent electronics.
Exception: Do not set the checkmark for the feed-trough mode with SA 100 / SA 110!
The subsequent electronics cannot supply power due to the potential segregation of the
SA 100 / SA 110.
The PWM is powered by the subsequent electronics.
(PWM 20 in feed-through mode)
"Use power supply from subsequent electronics" is only required for the feed-through mode
of the PWM 20. This means that the checkmark may only be set, if the PWM 20 is
connected to the control loop between the control and the encoder (closed loop; X2 OUT
connected to subsequent electronics) without an SA 100 / SA 110.
HEIDENHAIN recommends automatic connection by entering the ID number.
Automatic connection through entering the encoder ID is mandatory for feed-through
mode at axes with absolute encoders!
The relevant encoder data is read from a database. This database is part of the ATS
software.
The encoder database contains all ID numbers and variants of the encoders that existed
when the ATS software was released.
The database is updated about every six months.
You will find the most recent data at www.heidenhain.de.
If the manual setting of the encoder parameters does not match the connected encoder,
the encoder, the IK 215, the PWM 20 or the computer may be damaged.
For the encoder data, please refer to the respective mounting instructions or machine
documentation. Contact the machine manufacturer or the HEIDENHAIN Service.
Encoder connection
Please ensure that the correct supply voltage is selected to avoid damage to the encoder.
The cable between the encoder and the PWM 20 must not be connected or disconnected
while under power. Otherwise the encoder and the PWM 20 might be damaged.
Check whether the cable between the encoder and the PWM 20 is correctly wired.
The pin layout of the encoder is included in the specifications. The pin layouts of the connecting
cables are described in the catalog. An incorrectly wired connecting cable might damage the
encoder and the PWM 20.
November 2014 Software description 29
5.2.1 Feed-through mode
Note
"´Feed-through" mode means connecting the PWM 20 into the control loop of an NC-controlled
machine.
For diagnosing, the PWM 20 can be integrated into the control loop of an NC controlled
machine tool via adapter cables at the encoder input X1 and the encoder output X2.
For the feed-through mode the power supply must be switched to the subsequent electronics
in the ATS software.
Set the checkmark in feed-through mode only.
If no subsequent electronics is connected, the encoder is not powered (error message).
The feed-through mode is supported as of the software version 2.6. We recommend always
using the most recent software version (see www.heidenhain.de).
The feed-through mode cannot be used for all interfaces supported by the ATS.
In principle, the following interfaces allow for feed-through mode:
EnDat, Fanuc, Mitsubishi, 1 Vpp, TTL, 11 µApp
EnDat/Fanuc/Mitsubishi
Metallic isolation is possible with the service adapters SA 100 and SA 110.
No metallic isolation, if the measurement is conducted with the PWM 20 only.
For encoders that also support incremental signals, the incremental signals can now also be
displayed and evaluated.
EnDat 2.1
Normally, the only communication over the EnDat interface takes place during the start-up stage
of the NC (interrogation and transfer of the absolute position data):
"Listening in" on the EnDat communication is not possible. (The synchronization time is too
short for the PWM 20.)
The 1 Vpp signals A and B can be displayed.
SIEMENS NC controls currently use EnDat 2.1 with A/B signals and do not support the
monitor function!
30 HEIDENHAIN ATS Software User's Manual
EnDat 2.2
Note
DANGER
Communication takes place continuously. However, there is no prescribed communication
pattern. Instead, every OEM determines the sequence of EnDat communication on his own.
No universal “listening in” on the communication is possible.
The monitor function is only possible, if the valuation numbers for online diagnosis
are included in data transfer. (The following controls support the monitor function:
TNC 620, TNC 640, iTNC 530 [as of NC-SW 34049x-04], iTNC 530 HSCI with diagnostic
function and DRIVE-DIAG.)
Synchronization with communication may take some time.
1 Vpp
No metallic isolation, if the measurement is conducted with the PWM 20 only.
Metallic isolation is possible with the SA 100.
The PWM 20 picks off the signals; without 120-ohm signal termination.
The limit frequency is influenced by the test setup (adapter cable, etc.)
11 µApp
The line is interrupted in feed-through mode, i.e. the PWM 20 has an 11 µApp receiver and
reproduces the (emulated) input signals at the 11 µApp output.
The limit frequency is influenced by the test setup (adapter cable, etc.)
Not yet approved for ATS V2.8. Signal errors may occur!
TTL
Without PWT switchover:
The PWM 20 picks off the RS-485 signals, i.e. a standard RS-485 receiver without 120-ohm
termination is connected to the lines.
Automatic connection through entering the encoder ID is mandatory for feed-through
mode at axes with absolute encoders!
Incremental interfaces also permit manual connection by selecting the interface in
feed-through mode.
If the feed-through mode is not used, absolute and incremental encoders can be
connected manually.
However, automatic connection via the ID number is recommended!
Testing cables for feed-through mode are not suitable for regular machine operation.
Due to the great variety of machine designs and their grounding variants it is not
possible to exhaustively test all testing cables.
It is absolutely necessary that you check the safe and proper function of the testing
cables for every test situation!
Uncontrolled axis movements cannot be ruled out when working with testing devices
and cables in feed-through mode.
Example for machine axes with absolute encoders:
Determine the encoder ID with the PWM 20 before feed-through operation (no axis
movement required).
Automatic connection through entering the encoder ID is mandatory for feed-through mode at
axes with absolute encoders. However, the ID is not known and the encoders are not visible
under their covers.
The ATS software can read out and display the encoder ID.
November 2014 Software description 31
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