HEIDENHAIN ND 287 User Manual

Operating Instructions

ND 287

English (en) 11/2013

ND 287 screen

1

2

3

4

5

ND 287 front panel

7

6

Controls and displays

1 Status bar

Current operating mode: Actual Value, Distance-To-Go

Current display mode for input X1, X2 or coupled axes X1:X2

SCL shown in black: Scaling factor is active

COMP shown in black: Error compensation or axis-error compensation is active for the currently displayed axis or coupled axes.

Elapsed time of running stopwatch: If the stopwatch is stopped, the box appears dimmed.

mm, inch, DEG, DMS or rad: Currently active unit of measure

Currently active datum: The ND 287 allows you to work with two different datums.

Indicates the soft-key page (soft-key row) you are currently on.

2Position display: Current position value (length or angle), or other measured value

3Message line for displaying information, errors or warnings

4Status display:

<• / = / >: The first three symbols become effective when tolerance checking and sorting mode is activated.

MIN, ACTL or MAX and DIFF: Minimum, current or m aximum measured value of a series of measurements, or difference between minimum and maximum measured value.

SET: If you enter a new value during datum setting, the SET symbol will start flashing.

REF: The REF symbol is flashing until the reference mark evaluation for the displayed axis has been completed (if an incremental encoder is connected).

P0-P9: Selected part is displayed for the sorting and tolerance checking mode.

5 and 6 Soft keys and soft-key buttons for executing functions

1,2,3,4... Numeric input keys

ENTER

Use the ENTER key to confirm your entry or to return to the previous screen.

CUse the C key to clear an entry, acknowledge an error message or return to the previous screen.

The NAVIGATION key moves through the soft-key pages (soft-key rows).

7Use the UP or DOWN arrow key to move between fields within a form or menu items (parameters) within a menu.

ND 287 rear panel

1

3

2

X41

X32/X31

X26(X27)

X2

X1

Connections

1Power switch

2Power connection with fuse

3Ground (protective earthing)

X1	Encoder module for connecting a HEIDENHAIN encoder with 11 µApp, 1 Vpp or EnDat interface (purely
	serial)

Option: Analog module for connecting an analog sensor

X2 Optional:

Encoder module for connecting a HEIDENHAIN encoder with 11 µApp, 1 Vpp or EnDat 2.1/2.2 interface for a second axis or

Analog module for connecting an analog sensor, primarily a temperature sensor for axis-error compensation

X26 (X27)	Option: Ethernet module (100baseT) for network connection via TCP/IP protocol
X32/X31	Two serial ports for data transfer: RS-232-C/V.24 (X31) and USB Type B (UART, X32)
X41	Switching inputs and outputs at D-sub connection

Introduction

Software version

The software version is shown on the power-up screen of the ND 287.

This manual describes the functions that are available in the ND 287 and the installation of the units.

Symbols within notes

Every note is marked with a symbol on the left indicating to the operator the type and/or potential severity of the note.

General information

e. g. on the behavior of the ND 287.

Refer to accompanying documents

e.g. when a special tool is required for a function.

Danger to the operator, workpiece or internal components

e.g. danger of collision

Electrical hazard

e. g. danger of electrical shock when opening a housing.

The ND 287 must be prepared by a qualified and authorized technician to perform this function.

Fonts

The chart below shows how the different variables (soft keys, hard keys, forms and form fields) are represented within the text of this manual:

Soft keys – SETUP soft key

Hard keys – ENTER hard key

Menus and forms – UNITS OF MEASURE form

Parameters and input fields – ANGULAR field

Data in fields - ON, OFF

Introduction

ND 287

5

I Working with the ND 287 position display unit									.....	13
I – 1 ND 287 position display unit .....					14
I – 2 Fundamentals of positioning .....					16
Datums .....	16
Actual position, nominal position and distance-to-go .....										17
Absolute workpiece positions					.....	18
Incremental workpiece positions .....						18
Incremental position encoders .....						19
Absolute position encoders .....					19
Reference marks			..... 20
I – 3 Basic functions of the ND 287 .....					21
ND 287 power-up			..... 21
Reference mark evaluation .....					22
Working without reference mark evaluation .....									22
ND 287 shutdown			..... 22
Standard screen layout .....				23
Soft-key functions on the standard screen .....								25
Axis display mode .....			27
Data input .....	27
Integrated help system .....				28
Data input forms .....			29
Instruction box messages .....						29
Error messages .....			29
I – 4 Job Setup .....	30
Operating modes		.....	30
Datum setting .....			31
Setting the display value for one axis or for two axes in the X1 or X2 display mode .....											31
Setting the display value for two axes in display mode X1:X2 (applies to X1+X2, X1-X2, f(X1,X2)) .....												32
Calling the JOB SETUP menu .....						33
Unit of measure .....			34
Scaling factor .....		35
Value for datum point .....				36
Stopwatch .....	36
Console adjustment .....				37
Language .....	37
Switching signals		.....	38
Measured-value output .....				39
Function of external inputs .....					40
Compensation using a reference part .....							41

ND 287	7

I – 5 Series of measurements and statistical process control .....							42
Functions .....	42
Switching between series of measurements and SPC mode .....								42
Calling the SERIES OF MEASUREMENTS menu .....						43
Analysis of series of measurements .....					43
Setting up a series of measurements .....					44
Defining the display for a series of measurements .....						46
Setting the position or speed display .....					47
Defining the record mode			.....	47
Starting and stopping a series of measurements .....						48
Calling the SPC menu .....			49
SPC analysis .....		49
Setting up SPC .....		52
Samples .....	52
Tolerances .....		53
Control limits		..... 54
Statistical distribution .....			55
Measured value recording				..... 55
Deleting SPC statistics .....			55
Starting and stopping SPC			.....	56
I – 6 Sorting and tolerance checking .....				58
Sorting function .....		58
Defining the sorting parameters and part tolerances .....							59
I – 7 Error messages	.....	60
Overview .....	60

8

.....II Installation, specifications				63
II – 1 Installation and electrical connection .....						64
Items supplied .....		64
Optional accessories			.....	64
Mounting .....	65
Environmental conditions .....					65
Mounting location .....			65
ND 287 – Mounting and installation .....							65
Electromagnetic compatibility/
CE compliance .....		66
Electrical connection .....			67
Electrical requirements .....				67
Wiring the power connector .....						67
Grounding	..... 67
Preventative maintenance or repair .....						68
Connecting the encoders .....				68
D-sub connection X1/X2 (15-pin, female) for the following input signals										..... 68
Optional: Analog module with ±10 V interface at input X1 or X2 for connecting an analog sensor .....											69
II – 2 Installation Setup .....		70
INSTALLATION SETUP menu .....					70
Setting up the encoder .....				71
Incremental linear encoder .....					72
Incremental rotary encoder .....					73
Absolute encoder .....			74
Using an absolute multiturn rotary encoder as a linear encoder .....									74
Analog sensor with ±10 V interface, preferably a temperature sensor .....										75
Configuring the display .....				76
Linear encoder .....		76
Rotary encoder		..... 76
Analog sensor for compensation						..... 76
Counter settings .....		77
Setting the display modes of the axes .....							78
Formula for coupled position .....						78
Error compensation .....			79
Linear error compensation (not for rotary encoders) .....								80
Non-linear error compensation .....						81
Setting up the serial port .....				85
Setting up the data interface .....						85
Diagnostics .....	87
Keypad test .....		87
Display test .....		87
Encoder test .....		88
Power supply .....		90
Switching inputs test .....				91
Switching outputs test .....				92
ND 287											9

II – 3 Switching inputs and outputs .....				93
Switching inputs at D-sub connection X41						.....	93
Input signals	.....	94
Signal level of inputs .....			94
Ignoring the reference mark signals .....						94
Switching outputs at D-sub connection X41 .....							95
Output signals .....		95
Signal level of outputs .....				95
Trigger limits	.....	96
Sorting limits	.....	97
Trigger signal for error .....				97
Zero crossover .....		97
II – 4 Encoder parameters .....		98
Table values .....	98
HEIDENHAIN linear encoders				..... 98
HEIDENHAIN rotary encoders				..... 99
II – 5 Data interface .....	100
Data communication .....			100
Serial data transfer with the Import or Export function .....									101
Data transfer from the ND 287 to a printer							..... 101
Data transfer from the ND 287 to a PC .....							101
Importing data into the ND 287 from a PC .....							102
Data format .....		102
Control characters .....			102
Software update (firmware update) installation .....								103
Wiring the connecting cable .....				104
USB Type B (UART), socket as per IEC 61076-3-108 .....									105
External operation via RS-232-C/V.24 or USB interface .....									106
Key commands .....		106
Description of key commands .....					107
Key is pressed (TXXXX commands) .....						108
Output of screen contents (AXXXX commands)								..... 108
Execute function (FXXXX commands) .....						112
Execute special function (SXXXX commands) .....								112

10

II – 6 Measured value output .....			113
Alternatives for starting measured value output .....							113
Measured value output after a trigger signal .....							113
Propagation times .....			113
Duration of measured value transfer .....						113
Measured-value output via the serial data interface X31 or X32									..... 114
Propagation times .....			114
Duration of measured value transfer .....						115
Example: Data sequence during measured-value output .....									115
II – 7 Input and output of parameter list and error compensation table									..... 116
Text file .....	116
Output format of the parameter list .....					117
First line .....		117
Second line .....		117
Subsequent lines for the individual parameters .....								117
Last line	.....	117
Examples of parameter lists .....				118
ND 287 with rotary encoder connected to input X1								..... 118
ND 287 with two rotary encoders connected to inputs X1 and X2 (optional) .....										123
Output format of the error compensation table .....							128
First line .....		128
Second line .....		128
Third line .....		128
Fourth line (only if second axis input is available, optional) .....									129
Fifth line .....		129
Sixth line .....		129
Seventh line		..... 130
Subsequent lines for further compensation values .....								130
Last line	.....	130
Examples of error compensation tables					.....	131
ND 287 with linear encoder connected to input X1 .....								131
ND 287 with two linear encoders connected to inputs X1 and X2 (optional) .....										133
ND 287 with rotary encoder connected to input X1								..... 135
II – 8 Specifications for		..... 137
ND 287 .....	137
II – 9 Dimensions .....	140
ND 287 .....	140
II – 10 Accessories	.....	141
ID numbers for accessories .....				141
Mounting the input assemblies				..... 142
Mounting base for installation in 19-inch electrical cabinet .....									143

ND 287	11

12

Working with

the ND 287 position display unit

ND 287

13

I – 1 ND 287 position display unit

I – 1 ND 287 position display unit

The ND 287 position display unit from HEIDENHAIN is designed for measuring devices, adjustment and testing equipment, automated tasks, as well asinfeed and positioning tasks with up to two axes that can be moved manually.

Linear/angular/rotary encoders, length gauges or analog sensors can be connected to the ND 287. The ND 287 features two slots for the connection of modular input assemblies:

An encoder module for connecting an incremental photoelectrical

	HEIDENHAIN encoder with sinusoidal 11 µApp, 1 Vpp signals or an
	absolute HEIDENHAIN encoder with bidirectional EnDat interface
	(purely serial) is a standard item supplied with the position display
	unit.	Fig. I.1 ND 287
	Optional modules that can be easily adapted to the ND's
	requirements:
	Second encoder module for connecting aHEIDENHAIN encoder
	with 11 µApp, 1 Vpp or EnDat interface (purely serial) or
	Analog module for connecting an analog sensor with ±10 V
	interface, primarily a temperature sensor for axis-error
	compensation
	Sorting and tolerance checking function with capacity for saving
	the tolerances of 10 parts
	The following functions are available on the ND 287:

Multilingual user guidance: Language can be selected by the user

REF reference-mark evaluation for distance-coded or single reference marks

Display of position value (length or angle), traversing speed for series of measurements or other measured values from analog sensors

Distance-To-Go or Actual Value operating mode

Two datums

Scaling factor

Stopwatch

Reset or Preset function, also through external signal

Linear or non-linear error compensation for axis-error compensation

Switching inputs and outputs

14	I Working with the ND 287 position display unit

Series of measurements:

Sorting measured values and finding the Minimum, Maximum, Sum, Difference or a definable coupled position value.

Displaying the sorting results in order to intervene, if necessary.

Memory capacity for series of measurements: Up to 10 000 measured values per axis.

Analysis of series of measurements: Arithmetical mean value, standard deviation, graphical representation of all measured values with minimum, maximum and mean value of the series of measurements.

Measured-value acquisition by external signal or selectable sampling interval, or by pressing the ENTER key.

Statistical Process Control (SPC):

Calculation of arithmetical mean value, standard deviation and range. Displaying graphs or histograms with symmetrical or asymmetrical density function.

Process capability indices cp and cpk, quality control charts for mean value, standard deviation and range.

Measured-value acquisition by external signal or by pressing the ENTER key.

FIFO memory capacity: Up to 1000 measured values.

There are two serial ports for transmitting measured values,

compensation values or configuration parameters to a PC or printer: The data can be transferred via the RS 232-C/V.24 or the USB Type B (UART) interface. It is also possibl e to download software via the serial interface.

Diagnostic functions for testing the encoder, the keyboard, the screen, the supply voltage and the switching inputs/outputs.

On the ND 287, one measured value can be displayed in large characters on the screen at any one time. If two encoders are connected to the ND, you can switch the display from the position value supplied by the first encoder to the position value supplied by the second encoder, or to a defined coupled position value.

The integrated help system provides information and assistancein any situation.

I – 1 ND 287 position display unit

ND 287

15

I – 2 Fundamentals of positioning

I – 2 Fundamentals of positioning

Datums

The workpiece drawing identifies a certain point on the workpiece
(usually a corner) as the absolute datum and perhaps one or more
other points as relative datums.		Z
The datum setting procedure establishes these points as the origin of	?
the absolute or relative coordinate systems. The workpiece, which is
aligned with the machine axes, is moved to a certain position relative	?
to the length gauge and the display is set either to zero or to another
appropriate value.	?
	?
	?

Fig. I.2 Length gauge without datum setting: Unknown assignment of measured values to positions

Z

40

30

20

10

0

Fig. I.3 Length gauge with datum setting: Known assignment of measured values to positions

16	I Working with the ND 287 position display unit

Actual position, nominal position and distance-to-go

The position of the length gauge at any given moment is called the actual position, while the position that the length gauge is to move to is called the nominal position. The distance from the nominal position to the actual position is called the distance-to-go (see Fig. I.4).

I R

S

Fig. I.4 Nominal position S, actual position I and distance-to-go R

I – 2 Fundamentals of positioning

ND 287

17

I – 2 Fundamentals of positioning

Absolute workpiece positions

Each position on the workpiece is uniquely identified by its absolute coordinates (see Fig. I.5).

Example: Absolute coordinates of position 1: Z = 20 mm

If you are drilling or milling a workpiece according to a workpiece drawing with absolute coordinates, you are moving the tool or length gauge to the value of the coordinates.

20 1

0

Incremental workpiece positions

A position can also be referenced to the preceding nominal position. For this, the relative datum must be set to the preceding nominal position. Such coordinates are referred to as incremental coordinates (increment = increase). They are also called incremental or chain dimensions (since the positions are defined as a chain of dimensions). Incremental coordinates are identified by a preceding I.

Example: Incremental coordinate of position 3 referenced to position 2 see Fig. I.6.

Absolute coordinate of position 2: Z = 10 mm Incremental coordinates of position 3: IZ = 10 mm

If you are drilling or milling a workpiece according to a workpiece drawing with incremental coordinates, you are moving the tool or length gauge by the value of the coordinates.

Fig. I.5 Position 1: definition through absolute coordinates

10 3 10 2

0

Fig. I.6 Position 3: definition through incremental coordinates

18	I Working with the ND 287 position display unit

Incremental position encoders

Incremental linear and rotary encoders from HEIDENHAIN convert the movements of, for example, a length gauge into electrical signals. A position display unit, such as the ND 287, constantly evaluates these signals and calculates the actual positions of the length gauge, which it displays as a numerical value on the screen.

If there is a power interruption, the calculated position will no longer correspond to the actual position of the length gauge. When power is restored, you can re-establish this relationship with the aid of the reference marks on the position encoders and the ND 287's reference mark evaluation feature.

Absolute position encoders

Absolute linear and angle encoders from HEIDENHAIN transmit the absolute position value to the position display unit immediately after switch-on. This way the assignment of the actual position to the position of, for example, a length ga uge is re-established directly after switch-on.

The encoder reads the absolute position information directly from the scale graduation (see Fig. I.8), and transmits it serially to the position display unit via the bidirectional EnDat interface.

Z

Y

X

Fig. I.7 Linear position encoder, here for the X axis

I – 2 Fundamentals of positioning

Fig. I.8 Scale grating for absolute position encoders

ND 287

19

I – 2 Fundamentals of positioning

Reference marks

Encoders normally contain one or more reference marks (see Fig. I.9) which the ND 287's reference mark evaluation feature uses to reestablish datum positions after a power interruption. There are two main options available for reference marks: fixed and distance-coded.

Encoders with distance-coded reference marks have marks separated by a specific encryption pattern that allows the ND 287 to use any two pair of marks along the length of the encoder to reestablish the prior datums. This conf iguration means that the operator only has to travel a very short distance, anywhere along the encoder, to re-establish the datums when the ND 287 is turned back on.

Encoders with fixed reference marks have one or more marks on fixed intervals. To re-establish the datums correctly, it is necessary to use the same exact reference mark, during the reference mark evaluation routine, that was used when the datum was first established.

	Danger to workpiece!	Fig. I.9 Linear scales – with distance-coded
	The established datums cannot be restored from one	reference marks (upper illustration) and one
		reference mark (lower illustration)
	power cycle to the next if the reference marks were not
	crossed before the datums were set.

20	I Working with the ND 287 position display unit

I – 3 Basic functions of the ND 287

ND 287 power-up

Switch on the ND 287. The power switch is located onthebackoftheND.AfterswitchingtheND 287on, or after a power failure, the power-up screen will appear (see Fig. I.10). The green LED on the front panel lights up. The power-up screen shows the position display unit model as well as the ID and version number of the currently installed software.

Press the LANGUAGE soft key if you want to change the conversational language (see Fig. I.11). Press ENTER to confirm your selection.

Press the HELP soft key to call the integrated help system.

Press any key to call the standard screen.

Your ND 287 is now ready for operation in the Actual Value operating mode. If an incremental encoder is connected to the ND, the REF symbol is flashing. At this point the reference mark evaluation should be completed (see "Reference mark evaluation" on page 22).

If an absolute encoder is connected to the ND, the encoder automatically transmits the absolute position value to the position display unit.

If necessary, you can change the language later, see "Language" on page 37.

To update your software version (firmware version), see "Softwareupdate(firmwareup date)installation"onpage 103.

The idle time after which the ND activates the screen saver can be defined (factory default setting: 120 min, see "Console adjustment" on page 37). The red LED on the front panel lights up. To reactivate the screen, press any key or move the encoder.

You can deactivate the power-up screen in order to display the standard screen immediately after power up (see "Counter settings" on page 77).

Fig. I.10 Power-up screen

Fig. I.11 Selecting the language

I – 3 Basic functions of the ND 287

ND 287

21

I – 3 Basic functions of the ND 287

Reference mark evaluation

The ND 287's REF reference mark evaluation feature automatically reestablishes the relationship between axis-slide or length gauge positions and display values that you last defined by setting the datum.

Reference mark evaluation if an incremental encoder is connected (see Fig. I.12):

If the REF symbol is flashing, cross over the reference marks.The REF mark evaluation feature determines the correct display

value and the REF symbol stops flashing.
Working without reference mark evaluation
Press the NO REF soft key to exit the reference mark evaluation	Fig. I.12 Screen for establishing reference marks
routine and continue.
In order to activate the reference mark evaluation feature at a later
time, you can apply an external signal to pin 25 at connection X41
(see "Setting up the encoder" on page 71), or you can switch the
ND 287 off and then back on.
Danger to workpiece!
If an encoder is set up without reference marks, or if the
reference marks have not been crossed over, then the
REF indicator will appear dimmed, and datums set from
any axis will be lost once power is turned off. This means
that it is not possible to re-establish the relationship
between axis slide positions and display values after a
power interruption (switch-off).
ND 287 shutdown
Switch off the ND 287. The measured values of a
series of measurements will not be retained on a
power cycle. The parameter settings, the error
compensation tables or measured values that have
been saved during statistical pr ocess control will stay
in memory.

22	I Working with the ND 287 position display unit

Standard screen layout

In addition to displaying position information, the ND 287 standard screen also displays information on settings and operating modes at any time (see Fig. I.13). The standard screen is divided into the following areas:

1 Status bar

Current operating mode: Actual Value, Distance-To-Go.

X1, X2 or X1:X2: Current display mode of axis or coupled axes.

SCL shown in black: Scale factor is active.

COMP shown in black: The error compensation or axis-error compensation is active for the currently displayed axis or coupled axes.

Elapsed time of running stopwatch: If the stopwatch is stopped, the box appears dimmed.

MM, INCH, DEG, DMS or RAD: Currently active unit of measure.

Currently active datum: The ND 287 allows you to work with two different datums.

Indicates the soft-key page (soft-key row) you are currently on.

2Position display

Length display:

Current axis value with algebraic sign.

Angle display:

Current angle value with algebraic sign and unit of measure for display values in degrees, minutes or seconds.

When displaying the traversing speed in the series of measurements mode, the ND 287 shows the unit of speed in lowercase at the left edge of the screen.

3Message line

The message line provides information on the required data input or procedures, which is intended to support you in using the position display unit.

If errors or warnings occur, they show up in red letters in the message line. Acknowledge the message with the C key.

At the left edge of the message line the ND 287 displays a measured-value counter in the series of measurements mode, and a sample counter in the SPC mode.

If you have activated axis-error compensation with a temperature sensor, the ND shows the value measured by the temperature sensor at the left edge of the message line.

If a multiturn rotary encoder is connected, the ND shows the number of revolutions at the right edge of the message line.

1

2

3

4

5

Fig. I.13 Standard screen

I – 3 Basic functions of the ND 287

ND 287

23

I – 3 Basic functions of the ND 287

4Status display

P0-P9: The symbol for the selected part becomes active once you have activated the sorting and tolerance checking mode.

< / = / >: The first three symbols become active once you have activated the tolerance checking and sorting mode, as well as during Statistical Process Control (SPC). The symbols are shown in red if the current value is less than the lower sorting limit or greater than the upper sorting limit. Green indicates that the value is within the two sorting limits.

MIN, ACTL or MAX and DIFF: The symbols are only active, while a series of measurements is running. They indicate the display mode you have selected.

Set: If you enter a new value during datum setting, the SET symbol will start flashing.

REF: The REF symbol is flashing in red until the reference mark evaluation for the displayed axis has been completed (if an incremental encoder is connected).

5Soft keys

The NAVIGATION key (shown at left) allows you to move through the three pages of selectable soft-key functions. Press the corresponding soft key directly below each soft key label to execute the soft-key function. The soft-key assignment varies depending on the ND's operating mode.

24	I Working with the ND 287 position display unit

Soft-key functions on the standard screen

There are three pages (rows) of soft-key functions. Use the NAVIGATION key (shown at left) to move through the pages.

The page indicator in the status bar shows the number of

pages. The darkened page indicates the page you are currently Fig. I.14 Page indicator on. This manual provides more information about each soft key

on the pages indicated in the table below. Soft key page 1:

Soft key	Function	Page
SETUP	Opens the JOB SETUP menu and	Page 30
	provides access to the
	INSTALLATION SETUP soft key.
MEAS.	Opens the SERIES OF	Page 42
SERIES	MEASUREMENTS menu.
START MEAS.	Starts a series of measurements.	Page 48
SERIES
SPC	Opens the SPC menu.	Page 49
START	Starts the SPC function.	Page 56
SPC
PART	Opens the SELECT PART menu.	Page 58
TOLERANCE
Soft key page 2:
Soft key	Function	Page
HELP	Calls the integrated help system.	Page 28
PRINT	Transmits the current measured	Page 113
	value to a connected PC or printer
	via the serial interface.
Distance-to-go	Switches the display between	Page 30
on	operating modes Actual Value/
	Distance-To-Go.
MM	Switches the position display	Page 34
inch	(length or angle) to the displayed
	unit of measure. The selected unit
DEG	of measure is shown in the status
DMS	bar.
rad
Soft key page 3:

I – 3 Basic functions of the ND 287

ND 287

25

I – 3 Basic functions of the ND 287

Soft key	Function	Page
X1	This function is only available if the ND is configured for two axes:	Page 27, Page 77
[X2]	Switches the display mode in the status bar (X1, X2, X1:X2) and the display
	value.
	The upper axis designation indicates the displayed axis, here X1. The lower
	axis designation in brackets (here, X2) appears in the respective field if you
	press the soft key again. Press the soft key repeatedly for the following
	display values: X1, X2, X1+X2, X1-X2 and formula f(X1, X2).
DATUM	Switches the datum (see datum display in the status bar).	Page 31, Page 36,
PRESET	Sets the axis value to the preset value for the datum.	Page 31
	If a coupled position X1:X2 is active, the ND sets X1 to the preset value for
	the datum and resets X2 to zero..
RESET	Actual Value mode: Resets the selected datum of the displayed axis to zero.	Page 31
	If a coupled position is active, the ND resets the selected datum for both axes
	to zero.
	Distance-To-Go mode: Resets the distance-to-go for the displayed axis to
	zero. If a coupled position is active, th e ND resets the distance-to-go for both
	axes to zero.
MEASURE	Display the measured values of a reference part: If temperature compensation	Page 41
REF. PART	using a reference part is activated, the ND 287 displays the actual measured
	temperature value on the left side of the message line, and the entered nominal
	dimension of the reference part on the right side.

26	I Working with the ND 287 position display unit

Axis display mode

Press the X1-X2 [f(X1,X2)] soft key to select the desired display mode and the corresponding display value (see "Soft-key functions on the standard screen" on page 25):

Status bar	Function
	Display mode of axis X1 or input X1
	If an analog sensor is connected to
	input X2 and the ENCODER TYPE
	field under Encoder Setup is set to
	COMPENSATION, (see "Setting up
	the encoder" on page 71) the ND 287
	behaves in the same way as a single-	Fig. I.15 Standard screen with soft-key page 3
	axis display unit (only X1).
	Display mode of axis X2 or input X2
	Display mode for both axes: Display for
	X1+X2, X1-X2 or f(X1,X2).

If you want to enter a formula for (X1,X2), select the formula editor, see "Counter settings" on page 77. There you can also define the possible display modes of the axes.

Data input

Use the keypad to enter numeric values within each field.

TheENTERkeywillconfirmtheentrywithinafieldandreturntothe previous screen.

Press the C key to clear entries, acknowledge error messages or return to the previous screen.

Soft-key labels 1showthevariousoperatingandparameter-setting functions. These functions are selected by pressing the corresponding soft key directly below each soft key label. The soft-key functionsare usually arranged in up to three soft-key pages. Use the NAVIGATION key 2 to move through the soft-key pages (see below).

The NAVIGATION key 2 moves through the pages of available soft-key functions. The current page will be highlighted in the status bar at the top of the screen.

Use the UP or DOWN arrow key 3 to move between fields within a form or menu items (parameters) of a menu. The orientation of the cursor is such that it will return to the top once it has reached the bottom of the menu.

3

2

1

Fig. I.16 Data input

I – 3 Basic functions of the ND 287

ND 287

27

I – 3 Basic functions of the ND 287

Integrated help system

The integrated help system provides appropriate information and assistance in any situation (see Fig. I.17).

To call the integrated help system:

Press the HELP soft key.

Information relevant to the current operation will be displayed.

Use the UP or DOWN arrow keys or the PAGE UP or DOWN soft keys if the explanation is spread over more than one screen page.

	To view information on another topic:
	Press the LIST OF TOPICS soft key to view the index of the help
	topics.	Fig. I.17 Integrated help system
	Press the PART 1/[PART 2] soft key to call the extended help, which
	is available in exceptional cases.
	Press the UP or DOWN arrow key or the PAGE UP or PAGE DOWN
	soft key to scroll through the index.
	Press the VIEW TOPIC soft key or the ENTER key to select the item
	you need.
	To leave the integrated help system:
	Press the C key. The ND will return to the screen from which you
	called the help system.

28	I Working with the ND 287 position display unit

Data input forms

Information required for various operational functions and setup parameters is entered through a data input form. These forms will appear after selecting features that require any additional information. Each form provides specific fields for entering the required information.

To confirm the changes:Press the ENTER key.

To ignore the changes and return to the previous screen:Press the C key.

Instruction box messages

Whenever a menu or form is open, an instruction box will also open immediately to the right of it (see Fig. I.18). This message box will provide information to the operator on what the chosen function does and present instructions on the available options.

Fig. I.18 Example of instruction box messages

Error messages

If an error occurs while you are wo rking with the ND, the message will appear on the display and provide an explanation of what caused the error.

To acknowledge the error message:Press the C key.

If a new error occurs before the last error has been acknowledged, the last error that has occurred will be displayed. After the last error has been acknowledged, the previous error will be displayed again. The ND always stores the last error of each error category for acknowledgment (see "Error messages" on page 60).

I – 3 Basic functions of the ND 287

ND 287

29

I – 4 Job Setup

I – 4 Job Setup

Operating modes

The ND 287 has two operating modes: Actual Value and Distance-

To-Go.

Status bar	Function	Fig. I.19 Actual Value symbol (highlighted) in the
	Shows current actual position	status display
	Displays current distance from the
	nominal position

In the Actual Value operating mode, the ND 287 always displays the current actual position of the length gauge, relative to the active datum. In this mode, all moves are done by traveling until the display matches the nominal position that is required.

The Distance-To-Go feature enables you to approach nominal positions simply by traversing to display value zero. Proceed as follows:

Press the DELTA MODE ON soft key to switch the operating mode (see "Soft-key functions on the standard screen" on page 25): The display value is zero.

Use the numeric keys to enter the nominal position you want to move to and confirm with the ENTER key: The distance-to-go is displayed.

Traverse the axis until the display value is zero.

If required, enter the next nominal position and confirm with the ENTER key: Traverse the axis until the display value is zero.

To leave the Distance-To-Go operating mode: Press the DELTA MODE OFF soft key.

Algebraic sign of distance-to-go:

The distance-to-go has a positive sign if the axis direction from the actual toward s thenominalpositionis negative.

The distance-to-go has a negative sign if the axis direction from the actual toward s thenominalpositionis positive.

In the Distance-To-Go operating mode, the switching outputs A1 (pin 15) and A2 (pin 16) have a different function (see "Switching outputs at D-sub connection X41" on page 95).

30	I Working with the ND 287 position display unit