HEIDENHAIN ND 720 User Manual v.3

User’s Manual

ND 720
ND 760

Position Display Units
for Milling Machines

English (en)
12/2001

Position display
(ND 720 only two axes)

 Select coordinate axes

(ND 720 only X and Y)

 Select axis-specific operating parameters

Status display:

SET = Datum setting
REF = blinking:

Traverse the
reference points.
On continuously:
Reference points
have been traversed.

D = Distance-to-go display
1 2 Datum 1 or 2

Inch = Display in inches

SCL = Scaling factor

->❘❘<- = Probing an edge /
centerline
R = Radius/diameter display

R+/ = Radius compensation

• Select datum 1 or 2

• Page backward in the list of
special functions

• Page backward in the list of
parameters

HEIDENHAIN

Numerical input

• Change the algebraic sign

• Call the last dialog

• Edit parameters in the
list of parameters

• Confirm entry

• Page forward in the
list of parameters

Call radius compensation
of the current tool

• Select special functions

• Page forward in the
list of special functions

• Cancel entry

• Reset the operating mode

• Zero the selected axis

(if activated in P80)

• Select parameters
CL plus two-digit number

This manual is for the ND display units with the
following software numbers or higher:

Part I Operating Instructions

ND 720 for two axes 246 271-07
ND 760 for three axes 246 271-07

About this manual

This manual is divided into two parts:

Part I: Operating Instructions

 Fundamentals of positioning
 ND functions

Part II: Installation and Specifications

 Mounting the display unit on the machine
 Description of operating parameters
 Switching inputs, switching outputs

Fundamentals 4

Switch-On, Traversing the Reference Marks 9

Datum Setting 10

Datum setting with the tool 11
Datum setting with the KT Edge Finder 13

Tool Compensation 20

Moving the Axes with Distance-To-Go 21

Bolt Hole Circles and Bolt Hole Circle Segments 23

Linear Hole Patterns 26

Working with a Scaling Factor 29

Error Messages 30

Part II
Installation and
Specifications Page 31

and following

Part I Operating Instructions

3

Fundamentals

You can skip this chapter if you are already familiar with
coordinate systems, incremental and absolute dimensions,
nominal positions, actual positions and distance-to-go.

Coordinate system

The Cartesian

Fundamentals

a workpiece. The Cartesian coordinate system consists of three
mutually perpendicular axes X, Y and Z. The point of intersection of
these axes is called the datum or origin of the coordinate system.

Think of the axes as scales with divisions (usually in millimeters) which
allow us to fix points in space referenced to the datum.

To determine positions on a workpiece, the coordinate system is
laid onto the workpiece.

The machine axes are parallel to the axes of the coordinate system.
The Z axis is normally the tool axis.

1)

coordinate system is used to describe the geometry of

Y

–X

+Y

+Z

Graduation

+X

Datum or
origin

–Z

–Y

Z

X

1)

4

Named in honor of the French mathematician and philosopher
René Descartes (1596 to 1650)

Datum setting

The workpiece drawing is used as the basis for machining the
workpiece. To enable the dimensions in the drawing to be converted
into traverse distances of machine axes X, Y and Z, each drawing
dimension requires a datum or reference point on the workpiece
(since a position can only be defined in relationship to another
position).

The workpiece drawing always indicates one absolute datum (the
datum for absolute dimensions). However, it may contain additional
relative datums.

In the context of a numerical position display unit, datum setting
means bringing the workpiece and the tool into a defined position in
relation to each other and then setting the axis displays to the value
that corresponds to that position. This establishes a fixed relationship
between the actual positions of the axes and the displayed positions.

You can set 9 absolute datum points and store them in nonvolatile
memory.

1225

750

320

Absolute
datum

0

700

125

216,5

900

950

250

216,5
125

0

-125

-216,5

Relative
datum

250

Fundamentals

-250

-250

-125

-216,5

150

0

-150

0

300±0,1

0

0

325

450

5

Absolute workpiece positions

Each position on the workpiece is uniquely defined by its absolute
coordinates.

Example Absolute coordinates of position 1:

Fundamentals

If you are working according to a workpiece drawing with absolute
dimensions, then you are moving the tool to the coordinates.

Relative workpiece positions

A position can also be defined relative to the previous nominal
position. The datum for the dimension is then located at the previous
nominal position. Such coordinates are termed relative coordinates or
chain dimensions. Incremental coordinates are indicated by a
preceding I.

Example Relative coordinate of position 2 referenced to

If you are working according to a workpiece drawing with incremental
dimensions, then you are moving the tool by the dimensions.

Sign for incremental dimensioning

A relative dimension has a positive sign when the axis is moved in the
positive direction, and a negative sign when it is moved in the
negative direction.

6

X = 10 mm
Y = 5 mm
Z = 0 mm

position 1

:

IX = 10 mm
IY = 10 mm

Z

Y

X

1

5

10

Z

Y

10

1

5

2

10

1

10

X

Nominal position, actual position and distance-to-go

The position to which the tool is to move is called the nominal

S

position (

given moment is called the actual position (I).

The distance from the nominal position to the actual position is called

the distance-to-go (

Sign for distance-to-go

When you are using the distance-to-go display, the nominal position
becomes the relative datum (display value 0). The distance-to-go is
therefore negative when the tool moves in the positive axis direction,
and positive when it moves in the negative axis direction.

). The position at which the tool is actually located at any

).

R

Y

Z

I

S

R

X

Fundamentals

7

Position encoders

The position encoders on the machine convert the movements of the
machine axes into electrical signals. The ND display unit evaluates
these signals, determines the actual position of the machine axes and
displays the position as a numerical value.

Z

Y

Workpiece

If the power is interrupted, the relationship between the machine axis
positions and the calculated actual positions is lost. The reference

Fundamentals

marks on the position encoders and the REF reference mark
evaluation feature enable the ND to quickly reestablish this
relationship again when the power is restored.

Reference marks

The scales of the position encoders contain one or more reference
marks. When a reference mark is crossed over, a signal is generated
which identifies that position as a reference point (scale datum =
machine datum).

When this reference mark is crossed over, the ND's reference mark
evaluation feature (REF) restores the relationship between axis slide
positions and display values which you last defined by setting the
datum. If the linear encoders have distance-coded reference marks,
you only need to move the machine axes a maximum of 20 mm to do
this.

8

X

Position­ encoder

Scale in Distance-coded
linear encoder reference marks

Reference marks

Switch-On, Traversing the Reference Marks

0 è 1

ENT...CL

ENT

Crossing over the reference marks stores the most recently defined
assignment of display values to axis slide positions for datum points 1
and 2 in nonvolatile memory.

Note that if you choose not to traverse the reference marks (by
clearing the dialog ENT ... CL with the CL key), this relationship will be
lost if the power is interrupted or when the unit is switched off.

If you wish to use multipoint axis error compensation you
must traverse the reference marks (see Multipoint axis error
compensation)!

Turn on power (switch located on rear panel).
REF in status display starts blinking.

Confirm reference traverse mode. REF
remains on continuously. Decimal points start
blinking.

Cross over the reference marks in all axes in any
sequence. Each axis display becomes active
when its reference mark is crossed over.

Switch-On, Traversing the Reference Marks

9

Datum Setting

If you want to save the datum points in nonvolatile
memory, you must first cross over the reference
marks.

Only after crossing over the reference marks can you set
new datums or activate existing ones.

Datum Setting

In P70, you can select:
 Two datum points: The selected datum point

is displayed via 1 or 2

 Nine datum points: The selected datum point

is displayed in the lowest axis via d1 to d9.

There are two ways to set datums:

Touch the workpiece with the tool and then set the desired
datum (see example). You can also touch two edges and set
the centerline between them as a datum. The dimensions of
the tool used for this are automatically accounted for (see
Tool Compensation).

Probe the workpiece with the edge finder and then set the
desired datum. You can also probe two edges and set the
centerline between them as a datum, or touch the inside of a
circle and set the circle center as a datum (see examples).
The stylus radius and length are automatically accounted for
if they have been entered in parameters P25 and P26,
respectively (see Operating Parameters).

To call a datum you have set, proceed as follows:

You have set two datum points in P70:

Select datum 1 or 2.

You have set nine datum points in P70:

Press the datum key (d starts
blinking).

ENT

1

Enter a datum number (1 to 9).

10

Datum setting with the tool

Example:

Select a datum number (see page 10).

Working plane X / Y

Tool axis Z

Tool radius R = 5 mm

Axis sequence X  Y  Z
for datum setting

Z

R=5mm

Y

1

2

Select the special functions.

Select the probing function.

Datum Setting

SPEC

FCT

SPEC

FCT

or

PROBING

ENT

Confirm selection.

PROBE EDGE

X

ENT

Confirm Probe edge.

Select X axis (if not already selected).

X

SET lights. The ❘<- symbol starts to blink.





11

PROBE X (appears only briefly)

Touch workpiece edge 1 with the tool.



ENT

0




Enter position value for the datum
in the Y axis. Tool radius is automatically
compensated.

Datum Setting

0

PROBE Y (appears only briefly)

12

ENT

Y

ENT

1)

X position is captured. SET edge is

Z

The ❘<- status symbol starts blinking.

Select the Z axis. SET lights.

shown briefly. SET starts blinking.
Retract tool from workpiece.
The ❘<- status symbol lights.

PROBE Z (appears only briefly)

1)

Touch the top of the workpiece with the
tool.



ENT




Enter position value for the datum.
Tool radius is automatically
compensated.

ENT

Z position is captured. SET edge is
shown briefly. SET starts blinking.

1)

Retract the tool from the workpiece.

Select the Y axis. SET lights.

The ❘<- status symbol lights.

The ❘<- status symbol starts blinking.

ENT

0

Enter the position value for the datum in
the Z axis.

1)

Touch workpiece edge 2 with the tool.

SPEC

FCT

or

After setting the datum, exit the probing

CL

functions.

Y position is captured. SET edge is
shown briefly. SET starts blinking.
Retract tool from workpiece.
The ❘<- status symbol lights.

1)

only with ND 760

Datum setting with the KT Edge Finder

The ND position display units provide the following probing functions:

PROBE EDGE Setting a workpiece edge as datum

PROBE MIDPOINT Setting a midpoint between two

workpiece edges as datum

PROBE CIRCLE Setting the center of a circle as datum

The probing functions are accessible in the SPEC FCT mode of
operation.

Before using the edge finder you must enter the stylus diameter and
length in parameters P25 and P26, respectively (see Operating
Parameters).

During all probing functions, the ND position display unit accounts for
the entered dimensions.

The PROBE EDGE, PROBE MIDPOINT and PROBE CIRCLE
functions are described on the following pages.

Datum Setting

13

Probing a workpiece edge to find a datum

The edge to be probed is parallel to the Y axis. You can probe edges
and surfaces as described below to set all the coordinates of a datum.

Z

Datum Setting

SPEC

FCT

PROBING

PROBE EDGE

14

SPEC

FCT

ENT

ENT





Select a datum number (see page 10).

Select the special functions.

Select the probing function.

Confirm the probing function.

Confirm probe edge function.

Y

X?

X

X

PROBE X (appears only briefly)

5

2

Select the X axis (if not already selected).
SET lights. The ❘< status symbol
starts blinking.

Move the edge finder to edge of workpiece until
indicator in edge finder lights. SET edge is
shown briefly. SET starts blinking. The ND
displays the position of the edge. The ❘< status
symbol lights.

Back the edge finder away from the workpiece.

Assign a position value to this edge, e.g. 52.

ENT

Datum Setting

SPEC

FCT

or

Exit the probing function.

CL

15

Probing workpiece edges to find a midpoint datum

The edges to be probed run parallel to the Y axis.

Follow the procedure below for all midpoints between two edges.

Z

Datum Setting

SPEC

FCT

PROBING

PROBE EDGE

ANTASTEN MITTE

or

16

SPEC

or

ENT

FCT

Select a datum number (see page 10).

1

2

M

X?

X

Select the special functions.

Select the probing function.

Confirm the probing function.

Select the midpoint probing function.





Y

PROBE MIDP.

ENT

Confirm the probe midpoint function.
SET lights.

Set the position value for the midpoint

2

ENT

6

between the edges, e.g. 26.

Select the X axis (if not already selected).

X

1ST POS X (appears only briefly)

2ND POS X (appears only briefly)





The ->❘❘<- status symbol starts blinking.

Move edge finder toward workpiece
edge 1 until the indicator in the edge
finder lights. Back edge finder away
from the workpiece.

Move edge finder toward workpiece
edge 2 until the indicator in the edge
finder lights. SET MIDPOINT is
shown briefly. SET begins to blink.
Back the edge finder away from the
workpiece. The ->❘❘<- symbol begins to
blink.

SPEC

FCT

or

Exit the probing functions.

CL

Datum Setting

17

Probing the inside of a circle to set its center as datum

To determine the circle center, the tool must probe four points. The
points to be probed are located in the X-Y plane.

Select a datum number (see page 10).

Datum Setting

SPEC

FCT

PROBING

PROBE CIRC.

ANTASTEN MITTE

or

18

or

SPEC

FCT

ENT





Select the special functions.

Select the probing function.

Confirm the probing function.

Select the circle probing function.

PROBE CIRC.

ENT

1ST POS X (appears only briefly)

2ND POS X (appears only briefly)

Confirm Probe circle.

Move edge finder toward position 1
until the indicator in the edge finder
lights. Back edge finder away from
workpiece.

Move edge finder toward position 2
until the indicator in the edge finder
lights. Back edge finder away from
workpiece.

4TH POS Y (appears only briefly)

Move edge finder toward
position 4 until the indicator in the
edge finder lights. CENTER X is
shown briefly. The SET status display
starts to blink in the X axis.

Enter position value for the

2

0

ENT

6

ENT

X coordinate of circle center, e.g. 26.
CENTER Y is shown briefly. The SET
status display starts to blink in the Y
axis.

Enter position value for the Y coordinate
of circle center, e.g. 0.

Datum Setting

3RD POS Y (appears only briefly)

Move edge finder toward position 3
until the indicator in the edge finder
lights. Back edge finder away from
workpiece.





SPEC

FCT

or

Exit the probing functions.

CL

19

Tool Compensation

You can enter the axis, length and diameter of the current tool.

SPEC

Tool Compensation

FCT

TOOL DATA

TOOL DIAM.

2

TOOL LENGTH

5

20

1)

only with ND 760

SPEC

FCT

or

ENT

TOOL AXIS

Set the tool axis.

Exit the special functions.

CL

Select the special functions.

Z

TOOL AXIS

SPEC

or

FCT

Select tool data.

Confirm tool data input mode.

0

0

and confirm with ENT.

Enter the tool length, e.g. 50 mm,

ENT

and confirm with ENT.

1)

Enter the tool diameter, e.g. 20 mm,

ENT





Moving the Axes with Distance-To-Go Display

Normally, the display shows the actual position of the tool. However, it
is often more helpful to display the distance remaining to the nominal
position (the distance-to-go). You can then position simply by moving
the axis until the display value is zero.

You can enter the absolute coordinates in the distance-to-go display.
An active radius compensation will be considered.

Example: Milling a shoulder with distance-to-go

SPEC

FCT

SPEC

or

FCT

DELTA MODE

ENT

0

2

Y

ENT





Select the special functions.

Select delta mode.

Confirm your selection, the D symbol lights.

Select the axis, enter the nominal value,

+

R

-

e.g. 20 mm, select radius compensation R+,
confirm with ENT.

Moving the Axes with Distance-To-Go Display

21

Moving the Axes with Distance-To-Go Display

X

Y

Move the machine axis to zero (1).

Select the axis, enter the nominal value,

+

R

03

-

e.g. 30 mm, select radius compensation

+

ENT

R

-

R, and confirm with ENT.

Move the machine axis to zero (2).

Select the axis, enter the nominal

+

R

0

-

value, e.g. 70 mm, select radius

ENT

compensation R+, confirm with ENT.

Move the machine axis to zero (3).

22

SPEC

FCT

or

ENT

CL

If appropriate, switch off the distance­to-go display.

Bolt Hole Circles and Bolt Hole Circle Segments

Your display unit enables you to quickly and easily produce bolt hole
circles and bolt hole circle segments. The required data is requested in
the message field.

Each hole can be moved to by traversing to display value zero. This
requires entry of the following data:

 Number of holes (maximum: 999)
 Circle center
 Circle radius
 Starting angle for first hole
 Angle step between the holes (only for circle segments)
 Hole depth

Example

Number of holes 8
Coordinates of the center X = 50 mm

Y = 50 mm
Circle radius 20 mm
Starting angle 30 degrees
Hole depth Z = 5 mm

50

Y

30°

R20

0

0

50

X

Bolt Hole Circles/Bolt Hole Circle Segments

23

SPEC

FCT

or

SPEC

FCT

Select the special functions.

Select bolt hole circle.

CENTER X

5

ENT

0

Enter the X coordinate of circle center,
e.g. 50 mm, confirm with ENT.

Bolt Hole Circles/Bolt Hole Circle Segments

24

BOLT HOLE

ENT

FULL CIRCLE

If req.

NUMB. HOLES

ENT

8





ENT

Confirm your selection.

Confirm full circle.

Enter the number of holes, e.g. 8.
Confirm with ENT.

CENTER Y

0

5

ENT

RADIUS

02

ENT

START ANGLE

3

0

ENT





Enter the Y coordinate of circle center,
e.g. 50 mm, confirm with ENT.

Enter the radius of the bolt hole circle,
e.g. 20 mm. Confirm with ENT.

Enter the start angle for the first hole,
e.g. 30°. Confirm with ENT.

HOLE DEPTH

1)

5

ENT

START

ENT

ENT

SPEC

or

FCT

1)

only with ND 760

CL

Enter the total hole depth, e.g. 5 mm, and
confirm with ENT.

Start the display of the hole positions.

After the start, the distance-to-go mode becomes
active (the D symbol lights). The hole number is
shown briefly in the X axis. The individual holes
are reached by traversing to zero. The holes can
be selected with the ENT key or the 1 2 key.
If you press the minus key, the hole number is
shown again.

Exit the bolt hole circle function.

Bolt Hole Circles/Bolt Hole Circle Segments

25

Linear Hole Patterns

The linear hole pattern feature allows you to easily create rows of
holes to cover an area. The required data are requested in the
message field.

You can position to each hole by traversing to display value zero.
The following data are required:

 Coordinates of the first hole
 Number of holes per row (maximum: 999)
 Spacing between holes

Linear Hole Patterns

 Angle between the rows and the reference axis
 Hole depth
 Number of rows (maximum: 999)
 Spacing between rows

26

Example

Coordinates of the first hole X = 20 mm

Y = 15 mm
Number of holes per row 4
Spacing between holes 16 mm
Angle 15 degrees
Hole depth Z = -30 mm
Number of rows 3
Spacing between rows 20 mm

15

Y

12

16

9

8

7

6

5

2

1

0

0

20

3

15°

20

4

X

SPEC

FCT

SPEC

or

FCT

Select the special functions.

Select hole pattern.

HOLES ROW

4

ENT

Enter the number of holes per row,
e.g. 4, and confirm with ENT.

LIN. HOLE

ENT

1ST HOLE X

2

ENT

0

1ST HOLE Y

ENT

5

1





1)

only with ND 760

Confirm linear hole pattern.

Enter the X coordinate of the first holes,
e.g. 20, and confirm with ENT.

Enter the Y coordinate of the first holes,
e.g. 15, and confirm with ENT.

HOLE SPACE

1

6

ENT

ANGLE

1 5

ENT

HOLE DEPTH

0

3

ENT





Enter the spacing between holes in the
row and confirm with ENT.

Enter the angle, e.g. 15 degrees,
and confirm with ENT.

Enter the hole depth, e.g. 30 mm,
and confirm with ENT.

Linear Hole Patterns

1)

27

NUMBER ROW

ROW SPACE

Linear Hole Patterns

START

SPEC

FCT

ENT

ENT

3

ENT

02

ENT

Enter the number of rows, e.g. 3,
and confirm with ENT.

Enter the spacing of the rows, e.g. 20,
and confirm with ENT.

Start the display of hole positions.

The distance-to-go mode is now active (the D
symbol lights). The hole number appears briefly
in the X axis. Move to the individual hole
positions by traversing to the display value zero.
Hole can be selected with the ENT key or with
the 1 2 key. Pressing the minus key shows
the hole number again.

or

Exit the linear hole patterns function.

CL

28

Working with a Scaling Factor

Scaling factors enable you to increase or decrease the display values
based on the actual traverse distance. The display values are changed
symmetrically about the datum.

Enter scaling factors separately for each axis in parameter P12.

Y

Parameter P11 activates and deactivates the scaling factors in all axes
(see Operating Parameters).

Example for enlarging a workpiece:

P12.1 3.5
P12.2 3.0
P11 ON

This results in a larger workpiece as shown in the illustration at right:
1 is the original size, 2 is with axis-specific scaling factors.

If a scaling factor is active, SCL lights in the status display.

Scaling Factor

∗ 3.0

1

0

2

∗ 3.5

X

0

29

Error Messages

Message Cause and Effect

RS TOO FAST Time interval between two commands

SIGNAL X Encoder signal is too weak,

PROB. ERROR Before touching off on the workpiece,

Error Messages

DSR MISSING The connected device is not

ERR. REF. X The spacing of the reference marks as

FORMAT. ERR. Data format, baud rate, etc. do not

FRQ. X The input frequency for this encoder

too short.

e.g. when an encoder is contaminated.

the tool must move by a distance of at
least 0.2 mm.

transmitting a DSR signal.

defined in P43 is not the same as the
actual spacing.

match.

input is too high. This can occur when
the scale is moved too fast.

Message Cause and Effect

ERR. MEMORY Checksum error: Check the

datum, operating parameters and
compensation values for
multipoint axis error
compensation. If the error recurs,
contact your service agency!

REC. ERROR Error during reception of

parameter lists or
compensation-value lists.

To erase error messages:

After you have removed the cause of error:
➤ Press the CL key.

30

Part II Installation and Specifications

Items Supplied 32

Connections on Rear Panel 33

Mounting 34

Power Connection 34

Connecting the Encoders 35

Operating Parameters 36

Entering/changing operating parameters 36
Operating parameter list 37

Linear Encoders 40

Setting the display step
Display step, signal period and subdivision 40
Compatible HEIDENHAIN linear encoders 41

Multipoint Axis Error Compensation 43

Pin Layout of X10 46

Data Interface RS-232-C/V.24 47

Measured-Value Output 48

Input/Output of Parameter Lists and 54
Compensation-Value Lists

Output Structure of Parameter Lists 56

Output Structure of Compensation-Value Tables 62

External Operation via RS-232-C/V.24 66
Data Interface

Specifications 70

Dimensions of ND 720/ND 760 71

Part II Installation and Specifications

31

Items Supplied

 ND 720 for 2 axes

or

 ND 760 for 3 axes

 Power connector Id. Nr. 257 811-01

Items Supplied

 User's Manual

Optional accessories

 Tilting base for housing bottom

Id. Nr. 281 619-01

 KT 130 Edge Finder Id. Nr. 283 273-01

Connections on Rear Panel

ID label

Power switch

Power input

 Edge finder input
 RS-232-C/V.24

data interface

Connections on Rear Panel

Protective ground Encoder inputs X1 to X3 Rubber feet with M4 thread

The interfaces X1, X2, X3, and X10 comply with the requirements for electrical separation according to EN 50 178!

33

Mounting

ND 720/ND 760

To mount the display unit on a support, use the M4 threaded holes in
the rubber feet. You can also mount the display unit on the optional
tilting base.

Power Connection

Mounting/Power Connection

N

Power leads: and
Connect protective ground to !

Power supply: 100 Vac to 240 Vac (-15 % to +10 %)

A voltage selector is not necessary.

L

50 Hz to 60 Hz (± 2 Hz)

 Danger of electrical shock!

Connect a protective ground. This connection must never
be interrupted.

 Unplug the power cord before opening the housing.

HEIDENHAIN

Tilting base

Support

To increase the noise immunity, connect the ground terminal
on the rear panel to the central ground point of the machine.
(Minimum cross-section: 6 mm

2

).

Connecting the Encoders

Your display unit will accept all HEIDENHAIN linear encoders with
sinusoidal output signals (7 to 16 mA
reference marks.

Assignment of the encoder inputs

Encoder input X1 is for the X axis
Encoder input X2 is for the Y axis
Encoder input X3 is for the Z axis (ND 760 only)

Encoder monitoring system

Your display unit features a monitoring system for checking the
amplitude and frequency of the encoder signals. If it detects a faulty
signal, one of the following error messages will be generated:

SIGNAL X
FRQ. X

Encoder monitoring can be activated with parameter P45.

If you are using linear encoders with distance-coded reference marks,
the encoder monitoring system also checks whether the spacing of
the reference marks as defined in parameter P43 is the same as the
actual spacing on the scales. If it is not, the following error message
will be generated:

) and distance-coded or single

pp

Z Y X

Connecting the Encoders

ERR. REF. X

35

Operating Parameters

Operating parameters allow you to modify the operating
characteristics of your display unit and define the evaluation
of the encoder signals. Operating parameters that can be
changed by the user are called user parameters, and can be
accessed with the SPEC FCT key and the dialog PARA­METER (user parameters are identified as such in the
parameter list). The full range of parameters can only be
accessed through the dialog CODE and by entering 95148.

Operating parameters are designated by the letter P and a

Operating Parameters

number. Example: P11. The parameter designation is shown
in the input field when you select it with the DATUM and
ENT key in the X display. The parameter setting is shown in
the Y display.

Some operating parameters have separate values for each
axis. Such parameters have an additional index number from
1 to 3 with the ND 760 and from 1 to 2 with the ND 720.
Operating parameters with an index number can be selected
with the axis-direction keys.
Example: P12.1 scaling factor, X axis

P12.2 scaling factor, Y axis
P12.3 scaling factor, Z axis (ND 760 only)

The operating parameters are preset before the unit leaves
the factory. These factory default settings are indicated in the
parameter list in boldface type.

Entering and changing operating parameters

To access the operating parameters

➤ Press the SPEC FCT key.
➤ Press the SPEC FCT key or 1 2 , until

PARAMETER appears in the X display.

➤ Confirm your selection by pressing ENT.

To select protected operating parameters

➤ Press the 1 2 key to select the

P00 CODE user parameter.

➤ Enter the code number 95148.
➤ Confirm with the ENT key.

To page through the operating parameters

➤ Page forwards by pressing the ENT key.
➤ Page backwards by pressing the 1 2 key.

To change parameter settings

➤ Press the minus key or enter the value and confirm

with the ENT key.

To correct an entry

➤ Press CL: the old value reappears in the input line and

becomes effective again.

To exit the operating parameters

➤ Press the SPEC FCT or CL key.

List of operating parameters

P00 CODE Enter code number

9 51 48: Change protected operating parameters
66 55 44: Display the software version (in the X axis)

Display the date of release (in the Y axis)
10 52 96: Multipoint axis error compensation
48 61 53: Input and output of parameter lists and

compensation-value lists

P01 Unit of measure

1)

Display in millimeters MM
Display in inches INCH

P03.1 to P03.3 Radius/diameter display

1)

Display position value as radius RADIUS
Display position value as diameter DIAMETER

P11 Activate scaling factor

1)

Active SCALING ON
Not active SCALING OFF

P12.1 to P12.3 Define scaling factor

1)

Enter a scaling factor separately for each axis:
Entry value > 1: workpiece will grow
Entry value = 1: workpiece will remain the same size
Entry value < 1: workpiece will shrink
Input range: 0.100000 to 9.999999
Default setting: 1.000000

P25 Stylus diameter

1)

Input range (mm): 0.000 to 999.999
Default setting: 6

P26 Stylus length

1)

Input range (mm): 0.000 to 999.999

P30. 1 to P3 0.3 Counting direction

Positive counting direction with
positive direction of traverse DIRECT. POS

Negative counting direction with
positive direction of traverse DIRECT. NEG

P31.1 to P31.3 Signal period of the encoder

Input range: 0.00000001 to 99999.9999 µm
Default setting: 20 µm

P33.1 to P33.3 Counting mode

0 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9
0 - 2 - 4 - 6 - 8
0 - 5

P38.1 to P38.3 Decimal places

2 / 3 / 4 / 5 / 6 / 7 / 8

1)

User parameter

Operating Parameters

37

P40.1 to P40.3 Select type of axis error compensation

No axis error compensation COMP. OFF

Linear error compensation active,
multipoint error comp. not active COMP. LIN

Multipoint error compensation active,
linear error compensation not active COMP. MULTI

P41.1 to P41.3 Linear axis error compensation

Input range (µm): -99999 to +99999
Factory default setting: 0

Operating Parameters

Example: Displayed length Ld = 620.000 mm

Actual length (as determined for example with
the VM 101 from HEIDENHAIN)

La = 619.876 mm
Difference DL = La  Ld =  124 µm
Compensation factor k:
k = DL/Ld =  124 µm/0.62 m =  200 [µm/m]

P42.1 to P42.3 Backlash compensation

Input range (mm): +9,999 to –9,999
Default setting: 0,000 = no backlash

compensation
A change in direction might cause a clearance between
rotary encoder and table. This is referred to as backlash.
Positive backlash: The rotary encoder is ahead of the table.
The distance traversed by the table is too short (entry of
positive value).
Negative backlash: The rotary encoder follows the table. The
distance traversed by the table is too large (entry of negative
value).

P43.1 to P43.3 Reference marks

One reference mark SINGLE REF.M.
Distance-coded with 500  SP 500 SP
Distance-coded with 1000  SP 1000 SP
Distance-coded with 2000  SP 2000 SP
Distance-coded with 5000  SP 5000 SP
(SP: signal period)

P44.1 to P44.3 Reference mark evaluation

Evaluation REF. X ON
No evaluation REF. X OFF

P45.1 to P45.3 Encoder monitoring

Amplitude and frequency
monitoring ALARM ON
No monitoring ALARM OFF

P48.1 to P48.3 Activate axis display

Axis display active AXIS ON
Not active AXIS OFF

P49.1 to P49.3 Axis designation for measured value output

An axis designation for the measured value output can be set
through the number of the ASCII character. The axis
designation is output together with the measured value.

Input range: 0 to 127
Measured value output disabled 0
ASCII character from ASCII table 1 to 127
Default setting: P49.1 88

P49.2 89
P49.3 90

P50 Baud rate

1)

110 / 150 / 300 / 600 / 1200 / 2 400 / 4 800 / 9600 /
19 200 / 38 400

P51 Line feeds for measured value output

1)

Input range: 0 to 99
Default setting: 1

P70 Number of datum points

2 datum points 2 DATUM PT.
9 datum points 9 DATUM PT.

P80 Function of the CL key

Set to zero with CL CL....RESET

No set to zero with CL CL......OFF

P81 Function of the R+/- key

The R+/- key divides the actual R+/- 1/2 ON
value by two.

The actual value is not divided. R+/- 1/2 OFF

P96 Measured value output for probing

Measured value output active PROBE ON
Measured value output not active PROBE OFF

P97 Characters for measured values

ASCII characters for designation of the measured values for
output through probing, contact, or pulse.

Input range: 0 to 127
No ASCII character 0
ASCII character from ASCII table 1 to 127

P98 Conversational language

1)

German LANGUAGE DE
English LANGUAGE EN
French LANGUAGE FR
Italian LANGUAGE IT
Dutch LANGUAGE NL
Spanish LANGUAGE ES
Danish LANGUAGE DA
Swedish LANGUAGE SV
Finnish LANGUAGE FI
Czech LANGUAGE CS
Polish LANGUAGE PL
Hungarian LANGUAGE HU
Portuguese LANGUAGE PT

Operating Parameters

1)

User parameter

39

Linear Encoders

Selecting the display step with linear encoders

To select a certain display step, you must define the
following operating parameters:

 Signal period (P31)
 Counting mode (P33)
 Decimal places (P38)

Linear Encoders

Example

Linear encoder with a signal period of 20 µm

Desired display step ................ 0.000 5 mm

Signal period (P31) ................... 20

Counting mode (P33) ............... 5

Decimal places (P38) ............... 4

The following tables will help you select the
parameters.

Parameter settings for HEIDENHAIN linear encoders with 11 µA

Model

P 31 P 43

CT
MT xx01
LIP 401A/401R

LF 103/103C
LF 401/401C
LIF 101/101C
LIP 501/501C
LIP 101

MT xx 10 single 0.0005

LS 303/303C
LS 603/603C

2

4

20 single/1000 0.01

Reference
marks

Signal period

[µm]

single 0.0005

single

single/5000

single

Millimeters Inches

Display step
[mm]

Count

P 33 P 38

5

0.0002

0.0001

0.00005
Recommended only for LIP 401

0.00002

0.00001

0.000005

0.001

0.0005

0.0002

0.0001

0.00005
Recommended only for LIP 101

0.00002

0.00001

0.0002

0.0001

0.005

2
1
5

2
1
5

1
5
2
1
5

2
1

5
2
1

1
5

signals

PP

Decimal

4
4
4
5

5
5
6

3
4
4
4
5

5
5

4
4
4

2
3

Display
step [inch]

places

0.00002

0.00001

0.000005

0.000002

0.000001

0.0000005

0.0000002

0.00005

0.00002

0.00001

0.000005

0.000002

0.000001

0.0000005 15

0.00002

0.00001

0.000005

0.0005

0.0002

Count

P 33 P 38

2
1
5
2

1
5
2

5
2
1
5
2

2
1
5

5
2

Decimal

5
5
6
6

6
7
7

5
5
5
6
6

6
7

5
5
6

4
4

places

Linear encoders

41

Parameter settings for HEIDENHAIN linear encoders with 11 µAPP signals (continued)

Signal period

[µm]

Reference
marks

single/1000

-

Model

Linear Encoders

LS 106/106C
LS 406/406C
LS 706/706C

ST 1201

LB 302/302C

LIDA 10x/10xC

LB 301/301C 100 single/1000 0.005

LIM 501 10240 single 0.1

P 31 P 43

20

40 single/2000

Millimeters Inches

Display step
[mm]

Count

P 33 P 38

0.001

0.0005

0.005

0.002

0.001

0.0005
Recommended only for LB 302

0.0002

0.0001

0.002

0.001

0.01

0.05

1
5

5
2
1
5

2
1

5
2
1

1
1
5

3
4

3
3
3
4

4
4

3
3
3

1
2
2

Decimal

places

Display
step [inch]

0.00005

0.00002

0.0002

0.0001

0.00005

0.00002

0.000001

0.0000005 15

0.0002

0.0001

0.00005

0.005

0.0005

0.002

Count

P 33 P 38

5
2

2
1
5
2

2
1
5

5
5
2

Decimal

5
5

4
4
5
5

5
6

4
4
5

3
4
3

places

Multipoint Axis Error Compensation

Entries in the compensation-value table

If you want to use the multipoint axis error
compensation feature, you must
 activate this feature with operating parameter 40

(see "Operating Parameters"),

 traverse the reference marks after switching on the

display unit,

 enter a compensation value table.

Your machine may have a nonlinear axis error due to factors
such as axis sag or drivescrew errors. Such deviations are
usually measured with a comparator measuring system (such
as the HEIDENHAIN VM 101).

You can, for example, determine the screw pitch error X=F(X)
for the X axis.

An axis can only be corrected in relation to one axis that has
an error. In each axis, a compensation value table with
64 compensation values can be generated. You can select
the compensation table with the SPEC FCT key and the
PARAMETER\CODE dialog.

To determine the compensation values (e.g. with a VM 101),
the REF display must be selected after selecting the
compensation-value table.

+

R

-

Select the REF display.

The decimal point in the left display field indicates that the
displayed values are referenced to the reference point. If the
decimal point blinks, the reference marks have not been
traversed.

 Axis to be corrected: X, Y or Z (Z axis only with ND 760)

 Axis causing the error: X, Y or Z (Z axis only with ND 760)

 Datum for the axis to be corrected:

Here you enter the point starting at which the axis with
error is to be corrected. This point indicates the absolute
distance to the reference point.

Do not change the datum point after measuring the
axis error and before entering the axis error into the
compensation table.

 Spacing of the compensation points

The spacing of the compensation points is expressed as

x

2

[µm].

Enter the value of the exponent x into the compensation
value table.
Minimum input value: 6 (= 0.064 mm)
Maximum input value: 20 (= 1048.576 mm)

23 (= 8388.608 mm)

Example: 900 mm traverse and 15 compensation points:

results in 60.000 mm spacing between points.
Nearest power of two: 2

16

[µm] = 65.536 mm

Entry in compensation value table: 16

 Compensation value

You enter the measured compensation value (in
millimeters) for the displayed compensation point.
Compensation point 0 always has the value 0 and
cannot be changed.

Multipoint Axis Error Compensation

43

Selecting the compensation table, entering an axis correction

Select the special functions.

Select the "parameter" function if
required, by repeatedly pressing the

SPEC

FCT

SPEC

FCT

or

1 2 key.

PARAMETER

Select dialog for entering the code
number.

CODE

Enter code number 105296 and
confirm with ENT.

Multipoint Axis Error Compensation

AXIS X

ENT

Select axis to be corrected, e.g. X.
Confirm with ENT.

X FCT. X

DATUM X

SPACING X

27.000

ENT

ENT

ENT

ENT

ENT

Enter the axis causing the error, e.g. X
(screw pitch error), and confirm with
ENT.

Enter the active datum for the error on
the axis to be corrected (e.g. 27 mm)
and confirm with ENT.

Enter the spacing of the compensation
points on the axis to be corrected, for
example 2

10

mm (equals 1.024 mm) and

confirm with ENT.

Compensation point no. 1 is displayed.
Enter the associated compensation
value (e.g. 0.01 mm) and confirm with
ENT.









Deleting a compensation value table

28.024

or

Enter all further compensation points. If
you press the minus key, the unit will
show the number of the current
compensation point in the X display.
Direct selection of compensation
points: Press the minus key together
with the number (two-digit) of the
desired compensation point.

Conclude entry.

SPEC

FCT

SPEC

or

FCT

PARAMETER

CODE

AXIS X

DELETE Z

Select the special functions.

Select the parameter" function.

Select the dialog for entering the code
number.

Enter the code number 105296 and
confirm with ENT.

Multipoint Axis Error Compensation

Select the compensation value table
(e.g., for the Z axis), and delete the table.

Confirm with ENT, or cancel with CL.

Conclude entry.

45

Pin Layout of X10 for KT 130 Edge Finder and
Data Interface

Pin Signal Function

1 Internal shield

2 Standby

3RXD Receive data

4RTS Request to send

5CTS Clear to send

Pin Layout of X10

6U

P

+5 V

7 SIGN. GND Signal ground

8U

P

0 V

9TXD Transmit data

10 DSR Data set ready

11 DTR Data terminal ready

12 Meas. value output by contact

13 Switching signals

14 Meas. value output by pulse

15 CHASSIS Housing

GND

RS-232-C/V.24

In addition to a connection for the edge finder, the X10 socket also
provides an RS-232-C/V.24 data interface.

The data interface on your ND display unit enables you to use a printer or
a PC for transferring measured values or programs.

The interface is permanently set to the following data format:

1 start bit
7 data bits
Even parity bit
2 stop bits

The baud rate is set with parameter P50.

Full wiring

ND X10

CHASSIS

TXD

RXD

RTS

CTS

DSR
GNDSIGNAL

DTR

15GND

9

3

4

5

10

7

11

CHASSIS

GND

TXD

RXD

RTS

CTS

DSR
GNDSIGNAL

DTR

For connection to peripheral devices you can use either full wiring
(figure at upper right) or simplified wiring (below right).

Levels for TXD and RXD

Logic levels Voltage levels

1  3 V to  15 V

0 + 3 V to +15 V

Levels for RTS, CTS, DSR and DTR

Logic levels Voltage levels

1 + 3 V to +15 V

0  3 V to  15 V

Simplified wiring

ND X10

CHASSIS GND

TXD

RXD

RTS

CTS

DSR
GNDSIGNAL

DTR

15GND

9

3

4

5

10

7

11

CHASSIS

RS-232-C / V.24 Data Interface

TXD

RXD

RTS

CTS

DSR
GNDSIGNAL

DTR

47

Measured Value Output

Measured values can be output over the RS-232-C/V.24 interface. This
can be done with the following functions:

Probing with the KT Edge Finder
Contact input on X10
Pulse input on X10
CTRL B via the RS-232-C interface

Code letters with the measured value

Parameter P97 allows you to select a code letter to be output together
with the measured value when using Probe, Contact or Pulse. The

Measured Value Output

decimal number you enter in the parameter is the ASCII character
number in the ASCII table. If you enter 0, no code letter will be output.
The code letter enables you to recognize whether the measured value
was generated with CTRL B or with an external signal.

Axis designation for measured value output

Parameter P49 allows you to enter an axis designation for each
measured value that is output. The decimal number you enter in the
parameter is the ASCII character number in the ASCII table. If you enter
0, no axis designation will be output.

Example of measured value output:

Parameter settings:

P49.1 = 88 (X)
P49.2 = 89 (Y)
P49.3 = 90 (Z)
P51 = 0 (no line feeds)
P97 = 69 (E)

Output:

E (CR)(LF)
X=...(CR)(LF)
Y=...(CR)(LF)
Z=...(CR)(LF)

Measured value output when probing

Parameter P96 allows you to activate measured value output when
probing with the KT edge finder. The edge finder is connected to
D-sub input X10.

Whenever the Probe Edge function is used, your display unit outputs
the position of the edge in the selected axis and the actual positions of
the other axes over the TXD line of the RS-232-C/V.24 interface.

Whenever the Probe Midpoint function is used, your display unit
outputs the calculated midpoint in the selected axis and the actual
positions of the other axes.

Measured value output with CTRL B is disabled when a probing
function is active.

Delay times with data output

Duration of the latch signal: t
Storage delay: t
Data output after: t
Regeneration time: t

³ 4 µs

e

£ 4.5 ms

1

£ 50 ms

2

³ 0

3

Duration of data output in seconds:

209  number of axes + 11  number of line feeds

t

=

D

Baud rate

* 1.08

t

e

t

1

t

2

t

D

t

e

t

3

Measured Value Output

Next possible signal for measured value output: t

= t1 + t2 + tD + t3 [s]

E

49

Examples of measured value output when probing

Example: Probe edge, X axis

P R X : + 58541 . 2504 R <CR> <LF>

Y:- 10122 . 8660 R <CR> <LF>

Z : + 85903 . 3042 ? R <CR> <LF>

Example: Probe midpoint, X axis

Measured Value Output

Example: Probe circle

C L X : + 34761 . 2504 R <CR> <LF>

Y:- 10122 . 8660 R <CR> <LF>

Z : + 85903 . 3042 R <CR> <LF>

C C X : + 234 . 786 R <CR> <LF>

CCY:+ 452 . 816 R <CR> <LF>

Z : - 4563 . 305 R <CR> <LF>

➀ ➁➂➃➄➅➆➇➈ ➉

➀ Probed axis <PR>, <CL> / other axes
➁ Colon
➂ Plus or minus sign
➃ 1 to 8 places before the decimal point
➄ Decimal point
➅ 1 to 8 decimal places
➆ Unit: blank = mm, " = inches, ? = error message
➇ R = radius display, D = diameter display
➈ Carriage Return
➉ Line Feed

Pin 8 (0V)

Pin 12

Pin 14

Pin 8 (0V)

X10

X10

Measured value output over the contact and pulse inputs

Measured value output over the contact input (pin 12 on X10) and
pulse input (pin 14 on X10) can be triggered when these inputs are
closed against 0 V.

The measured values are output over the TXD line of the RS-232-C
interface.

A commercially available switch can be attached to the contact input.
This switch generates a signal for data output when it makes contact
against 0 V.

The pulse input can be triggered with TTL logic devices (for example,
SN74LSXX).

Delay times for data output

Latch signal duration: Pulse t
Latch signal duration: Contact t
Storage delay: Pulse t
Storage delay: Contact t
Data output follows t

2

Regeneration time t

³ 1.2 µs

e

³ 7 ms

e

£ 0.8 µs

1

£ 4.5 ms

1

t2£ 30 ms

³ 0

3

Measured Value Output

t

e

t

e

Duration of data output in seconds:

187  number of axes + 11  number of line feeds

t

=

D

Baud rate

* 1.08

Next possible signal for measured value output: tE = t1 + t2 + tD + t3 [s]

t

1

t

2

t

3

t

D

51

Measured value output with CTRL B

If the control character STX (CTRL B) is received over the RS-232-C
interface, the measured value referenced to this time point will be
sent over the interface. CTRL B is received over the RXD line and the
measured values are output over the TXD line.

The measured values can be received and stored using a terminal
program (e.g. Hyper Terminal, included with Windows® ).

The basic program at the upper right illustrates the basic structure of a
program for measured-value output.

Measured Value Output

Delay times for data output

BASIC program for measured value output:

10 L%=48
20 CLS
30 PRINT "RS232/V.24"
40 OPEN "COM1:9600,E,7" AS#1
50 PRINT #1, CHR$ (2);
60 IF INKEY$<>""THEN 130
70 C%=LOC(1)
80 IF C%<L%THEN 60
90 X$=INPUT$(L%,#1)
100 LOCATE 9,1
110 PRINT X$;
120 GOTO 50
130 END

Storage delay t
Data output follows t

2

Regeneration time after data output t

£ 0.5 ms

1

t2£ 30 ms

³ 0 ms

3

Duration of data output in seconds:

187  number of axes + 11  number of line feeds

t

=

D

Next possible signal for measured value output: t

Baud rate

= t1 +t2 + tD + t3 [s]

E

* 1.08

CTRLB CTRLB

t

1

t

2

t

3

t

D

Example of measured value output over the contact and pulse
inputs or CTRL B:

E <CR> <LF>

X = + 58541 . 2504 R <CR> <LF>

Y = - 10122 . 8660 R <CR> <LF>

Z = + 85903 . 3042 R <CR> <LF>

➀➁➂ ➃ ➄ ➅ ➆➇ ➈ ➉

➀ Axis designation
➁ Equality sign
➂ Plus or minus sign
➃ 1 to 8 places before the decimal point
➄ Decimal point
➅ 1 to 8 decimal places
➆ Unit: blank = mm, " = inches, ? = error message
➇ R(r) = radius display, D(d) = diameter display,

( ) = distance-to-go display

➈ Carriage Return
➉ Line Feed

Measured Value Output

53

Input/Output of Parameter and
Compensation-Value Lists

To call the "data transfer" function:

SPEC

FCT

SPEC

or

FCT

PARAMETER

ENT

CODE

Data transfer function:

TRANSFER

Input/Output of Parameter and Compensation-Value Lists

ENT

Select the special functions.

Select "parameter."

Select the dialog for entering
the code number.

Enter the code number 486153 and
confirm with ENT.

Proceed by pressing the ENT key.

SEND PARAM.

ENT

If req.

REC. PARAM.

If req.

SEND COMP. X

If req.

ENT

With the ENT key, the parameter list is
output over the RS-232-C/V.24 interface.
After output is completed, the display
unit returns to "TRANSFER" to send or
receive further lists. To proceed with the
data transfer menu, press the minus
key.

The display unit is ready to receive a
parameter list over the RS-232-C/V.24
interface. If no error occurs during the
reception of the parameter list, the
display unit is automatically reset and
restarted. To proceed with the data
transfer menu, press the minus key.

With the ENT key, the compensation
value list for the X axis is output over the
RS-232-C/V.24 interface. After output is
completed, the display unit returns to
"TRANSFER" to send or receive further
lists. To proceed with the data transfer
menu, press the minus key.

SEND COMP.Y

If req.

ENT

SEND COMP.Z

ENT

If req.

REC. COMP.

If req.

SPEC

or

FCT

1) Only with ND 760

With the ENT key, the compensation
value list for the Y axis is output over the
RS-232-C/V.24 interface. After output is
completed, the display unit returns to
"TRANSFER" to send or receive further
lists. To proceed with the data transfer
menu, press the minus key.

With the ENT key, the compensation
value list for the Z axis is output over the
RS-232-C/V.24 interface. After output is
completed, the display unit returns to
"TRANSFER" to send or receive further
lists. To proceed with the data transfer
menu, press the minus key.

The display unit is ready to receive a
compensation value list (X, Y or Z) over
the RS-232-C/V.24 interface. If no error
occurs during the reception of the
parameter list, the display unit returns to
"TRANSFER" to send or receive further
lists. To proceed with the data transfer
menu, press the minus key.

Exit the transfer function.

Note on the input/output of parameter and
compensation-value lists

With a terminal program (e.g. Hyper Terminal, included with
Windows
the RS-232-C/V.24 interface as text files and store them on your
PC. Each list must be saved as a separate text file. To transfer the
text files to the display unit, you can also use the terminal program.

If you wish, you can edit the text files with a text editor and
change, for example, the parameter values. However, this requires
knowledge of the different output structures of the lists (see the

1)

following pages). When receiving lists, the display unit assumes the
same list structure as used for the output.

When receiving lists, the display unit first waits for the starting
character < * >.
The receiving mode ends as soon as the display unit has received
the final character < * >.

The lists received are first checked for the type of display unit
(line 2 of output list). The receiving display unit accepts only lists
prepared by the same type of display unit. Furthermore, the list is
checked for completeness. Lists that contain, for example, too
many or too few parameters are ignored. If an error occurs, the
following error message appears:

REC. ERROR

To clear the error message, press the CL key.

When receiving non-valid parameter values, the display unit sets
the respective operating parameter to the default setting.
Example: "P01 INCH = INCH = 3"
Value 3 is not allowed. The parameter P01 is set to the default
setting "P01 MM = MM = 0".

®

), you can receive the lists output by the display unit over

Input/Output of Parameter and Compensation-Value Lists

55

Output Structure of Parameter Lists

Line 1

Each parameter output starts with the starting character < * > ( HEX: 0x2A)

* <CR> <LF>

3 characters

Line 2

Output of model designation

N D - 7 6 0 <CR> <LF>

13 characters 2 characters

Type of display unit End

Subsequent lines for the individual parameters:

Output Structure of Parameter Lists

a: Parameters:

The parameter setting can be edited by pressing the minus key (e.g. positive counting direction / negative counting direction,
etc.)
Examples:

P 0 1 I N C H = 1 <CR> <LF>

6 characters 13 characters 3 ch. 6 characters 2 characters

P 3 1 . 1 D P P O S . 5 = 5 <CR> <LF>

6 characters 13 characters 3 ch. 6 characters 2 characters

Parameter designation Parameter in plain language Sep.block Parameter value End
Left-aligned Right-aligned Right-aligned

b: Parameters:

The parameter setting can be edited by entering a value.
(e.g. LINEAR COR. 13,600 etc.)

P 3 1 . 1 S . P E R . = 1 2 8 0 0 <CR> <LF>

6 characters 13 characters 3 ch. 13 characters 2 characters

P 3 8 . 1 L I N E A R C M P . = + 1 2 4 6 7 <CR> <LF>

6 characters 13 characters 3 ch. 13 characters 2 characters

Parameter designation Parameter in plain language Sep. block Parameter value End
Left-aligned Right-aligned Right-aligned

Last line:

Each parameter list ends with the final character <*> (HEX: 0x2A)

* <CR> <LF>

The parameter text is sent in the language you have set and corresponds to the dialog text that is shown on the display unit.
However, the parameter value, not the text, is the decisive information when parameters are transferred to the display unit.

Output Structure of Parameter Lists

57

ND 720 parameter list: (factory default setting)

Parameter list Description

* Starting character (*);
ND-720 Type of display unit
P01 MM = 0 MM = 0; INCH = 1;
P03.1 RADIUS = 0 X axis: RADIUS = 0; DIAMETER = 1;
P03.2 RADIUS = 0 Y axis: RADIUS = 0; DIAMETER = 1;
P11 SCALING OFF = 0 SCALING OFF = 0; ON = 1;
P12.1 SCL = 1.000000 X axis: SCALING FACTOR = 1.000000; (value input)
P12.2 SCL = 1.000000 Y axis: SCALING FACTOR = 1.000000; (value input)
P25 PRO BE DIA. = + 6.000 PROBE DIAMETER = 6.000 mm; (value input)
P30.1 DIRECT.POS = 0 X axis: DIRECTION POS. = 0; NEG. = 1;
P30.2 DIRECT.POS = 0 Y axis: DIRECTION POS. = 0; NEG. = 1;
P31.1 S.PER. = 20 X axis: SIGNAL PERIOD = 20µm; (value input)
P31.2 S.PER. = 20 Y axis: SIGNAL PERIOD = 20µm; (value input);
P33.1 COUNT 0-1 = 1 X axis: COUNT 0-1 = 1; 0-2 = 2; 0-5 = 5;
P33.2 COUNT 0-1 = 1 Y axis: COUNT 0-1 = 1; 0-2 = 2; 0-5 = 5;
P38.1 DP POS. 3 = 3 X axis: DECIMAL PLACES 3 (range: 1-8)

Output Structure of Parameter Lists

P38.2 DP POS. 3 = 3 Y axis: DECIMAL PLACES 3 (range: 1-8)
P40.1 COMP. OFF = 0 X axis: COMPENSATION OFF = 0; LIN = 1; MULTI = 2;
P40.2 COMP. OFF = 0 Y axis: COMPENSATION OFF = 0; LIN = 1; MULTI = 2;
P41.1 LINEAR CMP. = + 0 X axis: LINEAR COMPENSATION = 0 µm/m (value input)
P41.2 LINEAR CMP. = + 0 Y axis: LINEAR COMPENSATION = 0 µm/m (value input)
P42.1 BKLASH = + 0.000 X axis: BACKLASH COMPENSATION 0.000 mm (value input)
P42.2 BKLASH = + 0.000 Y axis: BACKLASH COMPENSATION 0.000 mm (value input)
P43.1 1000 SP = 1000 X axis: ONE REF.M. = 0; 500; 1000; 2000; 5000 SP;
P43.2 1000 SP = 1000 Y axis: ONE REF.M. = 0; 500; 1000; 2000; 5000 SP;
P44.1 REF. ON = 1 X axis: REF.ON = 1; REF. OFF = 0;
P44.2 REF. ON = 1 Y axis: REF.ON = 1; REF. OFF = 0;
P45.1 ALARM ON = 1 X axis: ALARM ON = 1; ALARM OFF = 0;
P45.2 ALARM ON = 1 X axis: ALARM ON = 1; ALARM OFF = 0;

Parameter list Description

P48.1 AXIS ON = 1 X axis: AXIS ON = 1; AXIS OFF = 0;
P48.2 AXIS ON = 1 Y axis: AXIS ON = 1; AXIS OFF = 0;
P49.1 AXIS NAME = 88 X axis: AXIS NAME = 88; (0 - 127)
P49.2 AXIS NAME = 89 Y axis: AXIS NAME = 88; (0 - 127)
P50 9600 BAUD = 9600 BAUD RATE = 9600; (110-38400)
P51 EMPTY LINE = 1 LINE FEEDS = 1; (0-99)
P70 2 DATUM PT. = 2 2 DATUM POINTS = 2; 9 DATUM POINTS = 9;

P80 CL......OFF = 0 CL....OFF = 0; CL....RESET = 1;

P81 1/2 OFF = 0 ½ KEY OFF = 0; ½ KEY ON = 1;
P96 PROBING OFF = 0 PROBING OFF = 0; PROBING ON = 1;
P97 OUTPUT ID. = 0 OUTPUT ID. = 0; (0 - 127)
P98 LANGUAGE DE = 1 LANGUAGE: 0 = EN; 1 = DE; 2 = FR;
* 3 = IT; 4 = NL; 5 = ES;

6 = DA; 7 = SV; 8 = FI;
9 = CS; 10 = PL; 11= HU;
12 = PT;

Final character (*);

Output Structure of Parameter Lists

59

ND 760 parameter list: (factory default setting)

Parameter list Description

* Starting character (*);

ND-760 Type of display unit
P01 MM = 0 MM = 0; INCH = 1;
P03.1 RADIUS = 0 X axis: RADIUS = 0; DIAMETER = 1;
P03.2 RADIUS = 0 Y axis: RADIUS = 0; DIAMETER = 1;
P03.3 RADIUS = 0 Z axis: RADIUS = 0; DIAMETER = 1;
P11 SCALING OFF = 0 SCALING FACTOR OFF = 0; ON = 1;
P12.1 SCL = 1.000000 X axis: SCALING FACTOR = 1.000000; (value input)
P12.2 SCL = 1.000000 Y axis: SCALING FACTOR = 1.000000; (value input)
P12.3 SCL = 1.000000 Z axis: SCALING FACTOR = 1.000000; (value input)
P25 PR OB E DIA. = + 6.000 PROBE DIAMETER = 6.000 mm; (value input)
P26 PR OB E LEN. = + 0.000 PROBE LENGTH = 0 mm; (value input)
P30.1 DIRECT. POS = 0 X axis: DIRECTION POS. = 0; NEG. = 1;
P30.2 DIRECT. POS = 0 Y axis: DIRECTION POS. = 0; NEG. = 1;
P30.3 DIRECT. POS = 0 Z axis: DIRECTION POS. = 0; NEG. = 1;
P31.1 S.PER. = 20 X axis: SIGNAL PERIOD = 20µm; (value input)

Output Structure of Parameter Lists

P31.2 S.PER. = 20 Y axis: SIGNAL PERIOD = 20µm; (value input)
P31.3 S.PER. = 20 Z axis: SIGNAL PERIOD = 20µm; (value input)
P33.1 COUNT 0-1 = 1 X axis: COUNT. MODE 0-1 = 1; 0-2 = 2; 0-5 = 5;
P33.2 COUNT 0-1 = 1 Y axis: COUNT. MODE 0-1 = 1; 0-2 = 2; 0-5 = 5;
P33.3 COUNT 0-1 = 1 Z axis: COUNT. MODE 0-1 = 1; 0-2 = 2; 0-5 = 5;
P38.1 DP POS. 3 = 3 X axis: DECIMAL PLACES 3 (range: 1-8)
P38.2 DP POS. 3 = 3 Y axis: DECIMAL PLACES 3 (range: 1-8)
P38.3 DP POS. 3 = 3 Z axis: DECIMAL PLACES 3 (range: 1-8)
P40.1 COMP. OFF = 0 X axis: COMPENSATION OFF = 0; LIN = 1; MULTI = 2;
P40.2 COMP. OFF = 0 Y axis: COMPENSATION OFF = 0; LIN = 1; MULTI = 2;

P4 0 . 3 COMP. OFF = 0 Z axis: COMPENSATION OFF = 0; LIN = 1; MULTI = 2;

P41.1 LINEAR CMP. = + 0 X axis: LINEAR COMPENSATION = 0 µm/m (value input)
P41.2 LINEAR CMP. = + 0 Y axis: LINEAR COMPENSATION = 0 µm/m (value input)

Parameter list Description

P41.3 LINEAR CMP. = + 0 Z axis: LINEAR COMPENSATION = 0 µm/m (value input)
P42.1 BKLASH = + 0.000 X axis: BACKLASH compensation 0.000 mm (value input)
P42.2 BKLASH = + 0.000 Y axis: BACKLASH compensation 0.000 mm (value input)
P42.3 BKLASH = + 0.000 Z axis: BACKLASH compensation 0.000 mm (value input)
P43.1 1000 SP = 1000 X axis: ONE REF.MARK = 0; 500; 1000; 2000; 5000 SP;
P43.2 1000 SP = 1000 Y axis: ONE REF.MARK = 0; 500; 1000; 2000; 5000 SP;
P43.3 1000 SP = 1000 Z axis: ONE REF.MARK = 0; 500; 1000; 2000; 5000 SP;
P44.1 REF. ON = 1 X axis: REF.ON = 1; REF. OFF = 0;
P44.2 REF. ON = 1 Y axis: REF.ON = 1; REF. OFF = 0;
P44.3 REF. ON = 1 Z axis: REF.ON = 1; REF. OFF = 0;
P45.1 ALARM ON = 1 X axis: ALARM ON = 1; ALARM OFF = 0;
P45.2 ALARM ON = 1 Y axis: ALARM ON = 1; ALARM OFF = 0;
P45.3 ALARM ON = 1 Z axis: ALARM ON = 1; ALARM OFF = 0;
P48.1 AXIS ON = 1 X axis: AXIS ON = 1; AXIS OFF = 0;
P48.2 AXIS ON = 1 Y axis: AXIS ON = 1; AXIS OFF = 0;
P48.3 AXIS ON = 1 Z axis: AXIS ON = 1; AXIS OFF = 0;
P49.1 AXIS NAME = 88 X axis: AXIS NAME = 88; (0 - 127)
P49.2 AXIS NAME = 89 Y axis: AXIS NAME = 89; (0 - 127)
P49.3 AXIS NAME = 90 Z axis: AXIS NAME = 90; (0 - 127)
P50 9600 BAUD = 9600 BAUD RATE = 9600; (110-38400)
P51 EMPTY LINES = 1 LINE FEEDS = 1; (0 - 99)
P70 2 DATUM PT. = 2 2 DATUM POINTS = 2; 9 DATUM POINTS = 9;

P80 CL......OFF = 0 CL....OFF = 0; CL....RESET = 1;

P81 1/2 OFF = 0 ½ KEY OFF = 0; ½ KEY ON = 1;
P96 PROBING OFF = 0 PROBING OFF = 0; PROBING ON = 1;
P97 OUTPUT ID. = 0 OUTPUT ID. = 0; (0 - 127)
P98 LANGUAGE DE = 1 LANGUAGE: 0 = EN; 1 = DE; 2 = FR;

* 3 = IT; 4 = NL; 5 = ES;

6 = DA; 7 = SV; 8 = FI;
9 = CS; 10 = PL; 11= HU; 12 = PT;

Final character (*);

Output Structure of Parameter Lists

61

Output Structure of Compensation-Value Table

A separate compensation-value table is prepared and output for each axis to be corrected.

Line 1

Each compensation-value output starts with the starting character < * > ( HEX: 0x2A)

* <CR> <LF>

3 characters

Line 2

Output of model designation and unit of measure

N D - 7 6 0 M M <CR> <LF>

13 characters 5 characters 2 characters
Type of display unit left-aligned Unit of measure End

Line 3

Output of axis to be corrected

A X I S X = 0 <CR> <LF>

13 characters 3 ch. 6 characters 2 characters

Output Structure of Compensation-Value Table

Axis to be corrected left-aligned Sep. block Axis value End
Right-ali gned

Line 4

Output of axis causing the error

X F C T . X = 0 <CR> <LF>

13 characters 3 ch. 6 characters 2 characters
Axis causing the error Sep. block Axis value End
Left-aligned Right-aligned

Line 5

Output of spacing between compensation points

S P A C I N G X = 1 4 <CR> <LF>

13 characters 3 ch. 6 characters 2 characters
Spacing left-aligned Sep. block Spacing End
Right-ali gned

Line 6

Output of datum point for compensation

D A T U M X = + 0 . 0 0 0 <CR> <LF>

13 characters 3 ch. 13 characters 2 characters
Datum left-aligned Sep. block Datum value right-aligned End

Line 7

Output of compensation value no. 0

X N R . 0 0 = + 0 . 0 0 0 <CR> <LF>

13 characters 3 ch. 13 characters 2 characters
Compensation value no. left-aligned Sep. block Compensation value right-aligned End

Output Structure of Compensation-Value Table

63

Subsequent lines: Output of compensation values 1 - 63

Output of compensation values

X N R . 6 3 = + 0 . 1 2 3 <CR> <LF>

13 characters 3 ch. 13 characters 2 characters
Compensation value no. left-aligned Sep. block Compensation value right-aligned End

Last line:

Each compensation-value table ends with the final character <*> (HEX: 0x2A)

* <CR> <LF>

3 characters

Compensation-value table ND 720, X axis

Compensation-value table Description

* Starting character (*);

ND-720 MM Type of display unit; unit of measure (MM or IN);
AXIS X = 0 Axis to be corrected, X = 0; Y = 1; Z = 2;
X FCT. X = 0 Axis causing the error, X = 0; Y = 1; Z = 2;
SPACING X = 1 4 Spacing (Range : 6  23)
DATUM X = + 0.000 Datum point 0 mm (value input)

Output Structure of Compensation-Value Table

X NR. 00 = + 0.000 Compensation value 0 = 0.000 mm (compensation value 0 is always 0)
X NR. 01 = ---------- Compensation value 1 = no value entered
X NR. 02 = ---------- Compensation values 2  63: no value entered (axis is not corrected)
X NR. 03 = ---------­.
.

Compensation-value table Description:

.
X NR. 60 = ---------­X NR. 61 = ---------­X NR. 62 = ---------­X NR. 63 = ---------­*

Compensation-value table ND 760, Z axis

Compensation-value table Description:

* Starting character (*);

ND-760 MM Type of display unit; unit of measure (MM or IN);
AXIS = 2 Axis to be corrected, X = 0; Y = 1; Z = 2;
Z FCT. Z = 2 Axis causing the error, X = 0; Y = 1; Z = 2;
SPA CING Z = 15 Spacing (range: 6  23)
DATUM Z = + 15.225 Datum point: +15.225 mm (value input)
Z NR. 00 = + 0.000 Compensation value 0 = 0.000 mm (compensation value 0 is always 0)
Z NR. 01 = - 0.030 Compensation values 1  10 are assigned values (value input)
Z NR. 02 = - 0.042 The axis is corrected from 15.225 mm to 342.905.
Z NR. 03 = - 0.008
Z NR. 04 = + 0.000
Z NR. 05 = + 0.009
Z NR. 06 = + 0.018
Z NR. 07 = + 0.025
Z NR. 08 = + 0.042
Z NR. 09 = + 0.051
Z NR. 10 = + 0.062
Z NR. 11 = ---------- Compensation values 11  63: no value entered (memory empty)
Z NR. 12 = ---------­.
Z NR. 63 = ---------­* Final character (*);

Final character (*);

Output Structure of Compensation-Value Table

65

External Operation via RS-232-C/V.24 Data Interface

You can operate the display unit over the RS-232-C/V.24 data
interface using an external device.
The following commands are available on the ND 720 /
ND 760:
Format:
<ESC>TXXXX<CR> Key is pressed
<ESC>AXXXX<CR> Output of screen contents
<ESC>SXXXX<CR> Special function

Sequence of commands Meaning
<ESC>T0000<CR> 0 key
<ESC>T0001<CR> 1 key
<ESC>T0002<CR> 2 key
<ESC>T0003<CR> 3 key
<ESC>T0004<CR> 4 key
<ESC>T0005<CR> 5 key
<ESC>T0006<CR> 6 key
<ESC>T0007<CR> 7 key
<ESC>T0008<CR> 8 key
<ESC>T0009<CR> 9 key
<ESC>T0100<CR> CL key
<ESC>T0101<CR> - key

External Operation via RS-232-C/V.24 Data Interface

<ESC>T0102<CR> . key
<ESC>T0104<CR> ENT key
<ESC>T0107<CR> 1/2 key (datum)
<ESC>T0109<CR> X key

Sequence of commands Meaning
<ESC>T0110<CR> Y key
<ESC>T0111<CR> Z key (only ND 760)
<ESC>T0129<CR> SPEC FCT key
<ESC>T0142<CR> R+/- key

<ESC>T1000<CR> CE+0 keys
<ESC>T1001<CR> CE+1 keys
<ESC>T1002<CR> CE+2 keys
<ESC>T1003<CR> CE+3 keys
<ESC>T1004<CR> CE+4 keys
<ESC>T1005<CR> CE+5 keys
<ESC>T1006<CR> CE+6 keys
<ESC>T1007<CR> CE+7 keys
<ESC>T1008<CR> CE+8 keys
<ESC>T1009<CR> CE+9 keys

<ESC>A0000<CR> Output of model designation
<ESC>A0100<CR> Output of 14-segment display
<ESC>A0200<CR> Output of current value
<ESC>A0301<CR> Output of error text
<ESC>A0400<CR> Output of software number
<ESC>A0900<CR> Output of indicators

<ESC>S0000<CR> Counter RESET
<ESC>S0001<CR> Lock keyboard
<ESC>S0002<CR> Unlock keyboard

Description of RS-232-C/V.24 commands:

The display unit supports the XON-XOFF protocol when
executing commands. As soon as the internal character
buffer (100 characters) is full, the display unit sends the
control character XOFF to the sender. After the buffer has
been executed, the display unit sends the control character
XON to the sender. Following that, it is ready to receive data
again.

String: STX;

10 characters; CR; LF;
10 characters; CR; LF;
10 characters; CR; LF;

Output of 14-segment display:

The screen contents displayed are output (also dialogs and
error messages).

Key is pressed (TXXXX commands)

The display unit acknowledges each identified key command
by sending the control character ACK (Acknowledge
Control-F). Following that, the key command becomes
effective.
The display unit responds to commands that cannot be
identified or to invalid commands by sending the control
character NAK (No acknowledge Control-U)

Output of model designation:

The type of display unit, software number and the date of
software release are output.
Example:

<STX> N D - 7 6 0 <CR> <LF>

2 4 6 2 7 1 - 0 7 <CR> <LF>
2 0 0 1 - 0 6 - 2 2 <CR> <LF>

<STX> B O L T H O L E <CR> <LF>

- 1 2 3 4 5 . 6 7 8 <CR> <LF>

d 2 <CR> <LF>

String: STX;

Min. 10 to max. 13 characters; CR; LF;
(depending on number of commas and
decimal points) X: min. 10 to max. 13
characters; CR; LF; (depending on number of
commas and decimal points) Y only with
ND 760:
Min. 10 to max. 13 characters; CR; LF;
(depending on number of commas and
decimal points) Z only if "P70 = 2 datum points"
is set
2 characters; CR; LF;

External Operation Via RS-232-C/V.24 Data Interface

67

Output of current value:

The current position value of each axis is output (without
comma, with leading zeros).
Example:

Output of software number:

The current software number is output.

<STX> 2 4 6 2 7 1 - 0 7 <CR> <LF>

<STX> + 1 2 3 4 5 6 7 8 9 <CR> <LF>

- 0 0 0 0 0 1 4 7 3 <CR> <LF>
+ 0 0 0 0 0 0 0 0 0 <CR> <LF>

String: STX;

Output of error text:

The displayed error text is output. (Prerequisite: an error
message is displayed.)

<STX> F O R M A T E R R O R <CR> <LF>

External Operation Via RS-232-C/V.24 Data Interface

String: STX;

Algebraic sign; Numeric value with
9 characters; CR; LF; X axis
Algebraic sign; Numeric value with
9 characters; CR; LF; Y axis
Only with ND 760:
Algebraic sign; Numeric value with
9 characters; CR; LF; Z axis

13 characters; CR; LF;

String: STX;

10 characters; CR; LF;

Output of indicators:

The status display of each axis is output.
Example:
0 = Status symbol is dark
1 = Status symbol is on
2 = Status symbol blinks

<STX> 0 1 0 0 1 0 1 2 0 0 <CR> <LF>

0 1 0 0 1 0 1 0 0 0 <CR> <LF>
0 0 0 0 1 0 0 0 0 0 <CR> <LF>

a b c d e f g h i j

String: STX;

10 characters; CR; LF; X axis
10 characters; CR; LF; Y axis
Only with ND 760:
10 characters; CR; LF; Z axis

a = SET (set datum) f = inch (inch display)
b = REF (reference point) g = SCL (scaling factor)
c = distance-to-go display h = probing
d = datum point 1 i = R (radius display)
e = datum point 2 j = R+- (radius comp.)

Special functions (SXXXX commands):

Counter RESET:

After the software has reset the counter, the counter restarts.
(same function as switching the display unit on/off.)

Lock keyboard:

The display unit acknowledges this special function by
sending the control character ACK (Acknowledge).
All keys of the display unit are locked. The counter can only
be operated via external RS-232-C/V.24 commands. The
keyboard is either unlocked by sending the special function
"Unlock keyboard" or by switching the display unit on/off.

Unlock keyboard:

The display unit acknowledges this special function by
sending the control character ACK (Acknowledge).
A keyboard that has been locked with the special function
"Lock keyboard" is unlocked.

External Operation Via RS-232-C/V.24 Data Interface

69

Specifications

Housing ND 720/ND 760

Bench-top design, cast-metal housing
Dimensions (W  H  D)
270 mm  172 mm  93 mm

Oper. temperature 0° to 45° C (32° to 113° F)

Specifications

Storage temperature 20° to 70° C (4° to 158° F)

Weight Approx. 2.3 kg (5 lb)

Relative humidity <75% annual average

<90% in rare cases

Power supply 100 Vac to 240 Vac (-15% to +10%)

50 Hz to 60 Hz (± 2 Hz)

Power consumption 15 W

Protection IP 40 as per IEC 529

Encoder inputs For encoders with 7 to 16 µA

Grating period 2, 4, 10, 20, 40,
100, 200 µm and 12.8 mm
Reference mark evaluation for
distance-coded and single
reference marks

Input frequency Max. 100 kHz for 30 m (98.5 ft)

cable length

Display step Adjustable

(see Linear Encoders)

Datums 9 (nonvolatile)

Functions - Tool radius compensation

- Distance-to-go display

- Probing functions

- Circular & linear hole patterns

- Scaling factor

- Measured value output

RS-232-C/V.24 Baud rates adjustable
interface 110, 150, 300, 600, 1200, 2400,

4800, 9600, 19 200, 38 400

PP

Dimensions in mm/inches

Tilting base

38 ± 0.5

1.5 ±.02"

20°

56

2.205"

8
.32"

4.5

.18"

15
.6"

92

3.622"

210 ± 0.2

8.268 ± .008"
240

9.45"

4.5

.18"

120 + 0.5

4.73 + .02"

Specifications

71

HEIDENHAIN (G.B.) Limited

200 London Road, Burgess Hill
West Sussex RH15 9RD, Great Britain

{ (0 14 44) 2477 11
| (0 14 44) 8700 24

341 696-23 · SW246 271-07 · 4 · 12/2001 · F&W · Printed in Germany · Subject to change without notice