HEIDENHAIN ND 221 Manuel utilisateur

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Working with the measured ND 221

value display unit

HEIDENHAIN

REF

1 SET

in.

7 8 9

4 5 6

1 2 3

0.–

MOD

Actual value and input display

(7-segment LED,

9 decades and sign)

Select datum

• Page backward in

parameter list Numeric keypad

• Confirm entry value

• Set display to value from

P79 (P80!)

• Go to parameter list after switch-on

• Page forward in parameter list

• Algebraic sign

• Decrease pa-

rameter value

• Clear entry

• Reset to zero (P80!)

• CL plus MOD:

parameter list

• CL plus 2-digit number:

select parameter

• Clear parameter entry

and show parameter

number

Indicator Meaning

REF If decimal points are blinking:

Display is waiting for the reference mark to be crossed over.

If decimal points are not blinking:

Reference mark was crossed over—datum points are now

stored in nonvolatile memory.

Blinking: Waiting for operator to press ENT or CL.

in. Position values displayed in inches.

1 / 2 Datum 1 / Datum 2 currently active.

SET Blinking: Waiting for operator to confirm entry values.

• Decimal point

• Increase pa-

rameter value

Status display

HEIDENHAIN

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The ND 221 is designed primarily for use with HEIDENHAIN MT Length Gauges.

MT gauges feature one reference mark. When the reference mark is crossed over,

it generates a signal identifying that position as a reference point.

After switch-on, simply crossing over the reference mark re-establishes the relation-

ship between axis positions and display values as it was last defined by datum

setting.

It is also possible to use other photoelectric linear encoders (see “ Parameter Settings

for HEIDENHAIN Linear Encoders”). These encoders have one or more reference

marks, which may also be

distance-coded

. With distance-coded reference marks, a

maximum traverse of only 20 mm after switch-on suffices to re-establish the datum.

Switch-On

You can switch from one datum to the other at any time.

Use datum 2 when you want to display incremental dimensions.

Select datum 1 or 2.

4 0

Confirm entered value.

Enter a value, such as 40.

Switch on reference mark evaluation

• The display shows the value last assigned to the

reference mark position.

• REF indicator glows.

• Decimal point blinks.

Cross over reference mark

Move the axis until the display becomes active and the

decimal point no longer blinks.

5 , 6 9 7

Turn on the power (switch located on rear panel)

• Display shows .

• REF blinks.

Ent...CL

0 ➤1

If you do not wish reference mark evaluation, press CL instead of ENT.

Setting the Datum

The datum setting procedure assigns a display value to a specific axis position.

The ND 221 allows you to set two separate datum points.

⇔

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Operating Parameters

The parameters are divided into “ user parameters“ and “ protected operating param-

eters," which can only be accessed by entering a code number.

User parameters

User parameters are operating parameters that you can change without entering the

code number: They are designated P00 to P30, P50, P51, P79, P86

Calling user parameters

To call user parameters immediately after switch-on:

➤➤

➤Press the MOD key as long as is visible in the display.

To call user parameters during operation:

➤➤

➤Press and hold the CL key, then press MOD.

To go directly to a specific user parameter:

➤➤

➤Press and hold the CL key, then press the first digit of the parameter number.

➤➤

➤Release both keys and press the second digit.

Protected operating parameters

Before you can change protected operating parameters you must enter the code

number 95 148 through : They remain accessible until you switch off

the position display.

To page through the parameter list

➤➤

➤Forward paging: Press the MOD key.

➤➤

➤Backward paging: Press the 1 / 2 key.

By paging on, you automatically enter any change you've made in a parameter.

To change operating parameters

➤➤

➤Increase the parameter value with the decimal point key, or

➤➤

➤Decrease the parameter value with the minus key, or

➤➤

➤Enter the numerical value for the operating parameter, e.g. for P41 ( SET blinks).

To correct your entries and show the parameter designation

➤➤

➤Press the CL key.

To exit the operating parameters

➤➤

➤Press ENT. All changes made become effective.

Operating Parameter List

Parameter Meaning Function / Effect Setting

Enter code number 95 148 to change a protected operating

parameter.

Unit of measure Display in millimeters

Display in inches

Counting Normal (

Positive

)

Direction

direction Inverse (

Negative

)

Subdivision of encoder signal period 400, 320, 256, 200, 160,

Subdivision

128, 100, 80, 50, 40, 20, 10, 8, 5, 4, 2, 1, 0.8, 0.5, 0.4, 0.2, 0.1

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Operating Parameter List —

continued

Parameter Meaning Function / Effect Setting

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

mode 0 -2 - 4 -6 - 8 -0

0 -5 - 0

Decimal places 1 / 2 / 3 / 4 / 5 / 6 (up to 8 with inch display)

Decimal point

Linear error compensation1)

Compensation

–99 999,9 < P41 < + 99 999,9 [µm/m]

Reference One reference mark

marks Distance-coded with 500 • SP

(SP = signal period)

Distance-coded with 1000 • SP

(e.g. for LS 303 C/ LS 603 C)

Distance-coded with 2000 • SP

Distance-coded with 5000 • SP

Reference mark Evaluation

evaluation No evaluation

Encoder No monitoring (

Alarm Off

)

Encoder

monitoring Contamination

Frequency

Contamination and frequency

Baud rate

110, 150, 300, 600, 1200, 2400, 4800, 9600

Additional line feeds

0 to 99 (

Linefeed

)

Value for Enter numerical value for datum setting with

Preset

datum the ENT key

Reset/Preset No zero reset/preset with CL/ENT

Zero reset with CL (

Set Zero

no preset with ENT

Zero reset with CL and

preset with ENT to value in P79

Display after message displayed

Message

switch-on message not displayed

Inhibit PRINT PRINT inhibited

Mode

function PRINT not inhibited

1) Determine entry value for P41

Example: Displayed measuring length La= 620.000 mm

Actual length (determined with, for example, the VM 101

comparator system from HEIDENHAIN) Lt= 619.876 mm

Length difference ∆L = Lt– La= –124 µm

Compensation factor k:

k = ∆L / La= –124 µm / 0.62 m = –200 [µm/m]

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Parameter Settings for HEIDENHAIN Linear Encoders

Example: Set parameters for any encoder

Linear encoder with signal period s = 10 µm

Desired display step a = 0.000 1 mm

Subdivision P32= 0.001 s / a ==

= 100

Counting mode

P33 = 1 (display counts 1, 2, 3 ...)

Decimal places of a: P38 = 4

Display step

(unit: P01) The following settings

apply for mm:

Model

Signal

period [µm]

Reference

marks

P43

mm inches Subdi-

vision

P32

Count.

mode

P33

Decimal

places

P38

MT xx01 one single

none -

0,0005

0,0002

0,0001

0,00005

0,00002

0,00001

0,000005

0,000002

Recommended only for LIP401

LIP 401

one single

0,00002

0,00001

0,000005

0,000001

0,0000005

0,0000002

100

200

400

one singleLF 103

LF 401

LIF 101

LIP 501

dist.c. 5000 0,001

0,0005

0,0002

0,0001

0,00005

0,00002

0,00001

0,000005

0,000002

Recommended only for LIP 101

LIP 101

one single

0,00002

0,00001 0,000001

0,0000005 200

400 2

MT xx 10 one single 0,0005

0,0002

0,0001

0,00002

0,00001

0,000005

100

one singleLS 303

LS 603 20 dist.c. 1000 0,01

0,005 0,0005

0,0002 2

one singleLS 106

LS 406

LS 706 dist.c. 1000

ST1201

none -

0,001

0,0005 0,00005

0,00002 20

40 1

one single 0,005

0,002

0,001

0,0005

0,0002

0,0001

0,00005

0,00002

Recommended only for LB 302

LB 302

LIDA 10x 40 dist.c. 2000

0,0002

0,0001 0,00001

0,000005 200

400 2

one singleLB 301 100 dist.c. 1000 0,005

0,002

0,001

0,0002

0,0001

0,00005

100

LIM 102 12800 one single 0,1

0,05 0,005

0,002 128

256 1

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Data Output

There are two ways to output data:

➤PRINTfunction: Press MOD (this method can be inhibited with

operating parameter P86); or

➤Enter the command STX(CTRL B) over the RXD input.

A connecting cable (to a PC, for example) is available from HEIDENHAIN

(Id.-Nr. 274 545 ..); cable length up to 20 m (66 ft).

Operating parameters for data output: P50, P51

Wiring, pin layout

Connecting cable is either completely wired (left) or only partially wired (right).

1GND 2

TXD

RXD

RTS

CTS

DSR

GNDSIGNAL DTR

CHASSIS 1 GND

TXD

RXD

RTS

CTS

DSR

GNDSIGNAL DTR

CHASSIS

11GND 2

TXD

RXD

RTS

CTS

DSR

GND

SIGNAL DTR

CHASSIS 2

GND

TXD

RXD

RTS

CTS

DSR

GND

SIGNAL DTR

CHASSIS

CHASSIS GND: Chassis Ground; TXD: Transmitted Data; RXD: Received Data;

RTS: Request To Send; CTS: Clear To Send; DSR: Data Set Ready; SIGNAL GND:

Signal Ground; DTR: Data Terminal Ready

Signals Signal level "active" Signal level "not active"

TXD, RXD –3 V to –15 V +3 V to +15 V

RTS, CTS, DSR, DTR +3 V to +15 V –3 V to –15 V

Data transfer format and transmission control characters

Format ASCII code

Data word 1 start bit, 7 data bits, parity bit (even parity), 2 stop bits

Control characters Call measured value: STX (CTRL B), interrupt DC3 (CTRL S),

resume DC1 (CTRL Q)

Enquire error message: ENQ (CTRL E)

Sequence • Sign • Numerical value with decimal point • Blank space

• Unit (blank space = mm, " = inches, ? = error)

• 2 blank spaces • Carriage return • Line feed

Storage and transfer times

The duration of data transfer depends on the selected baud rate and on the number

of additional line feeds.

Latch signal Storage time Data transfer time

STX (CTRL) B ≤1 ms ≤23 ms

PRINT ≤22 ms ≤44 ms

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Error Messages

To clear error message :

When you have removed the cause of the error,

➤press CL.

Message Cause and effect

Last measured value not yet latched

External device not ready for data transfer

( only appears once)

Data interface:

Parity error or wrong data transfer format

Incorrect input value

Encoder signal too weak(encoder may be contaminated)

Input frequency too high for encoder input (will occur for example

when the scale is moved too quickly)

Internal counter overflow

Error while crossing over reference marks

To clear the error message: Switch off the display unit.

Should any of these error codes recur, contact your

HEIDENHAIN service agency.

Offset compensation values for encoder signals have been

erased: contact your HEIDENHAIN service agency.

Erase the operating parameters.

If all decimal points light up, the measured value is too large or too small.

In this case, set a new datum or retract.

Distance-To-Go Mode

The standard setting for the display unit is to show the encoder position value.

Particularly on machine tools and for tasks in automation, however, it can be very

helpful for the display to instead show the distance remaining to a manually entered

nominal position. You can then position the tool by simply moving the axis to the

display value zero. Code number 246 582 provides access to distance-to-go mode.

Display Meaning

No distance-to-go display

Distance-to-go display

“Traverse to zero” with distance-to-go display

➤➤

➤Select datum 2.

➤➤

➤Enter the nominal position.

➤Move the axis to zero.

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Rear Panel

Input for HEIDENHAIN linear encoder with

sinusoidal output signals (7µAPP to 16 µAPP),

connecting cable max. 30 m (98.5 ft), maxi-

mum permissible input frequency 100 kHz

Ground terminal

Power switch

Power Supply and Connection

Installation

You can fix the display unit to a mounting surface with

M4 bolts.

The units can also be stacked. Adhesive inserts (included

in delivery) prevent them from sliding.

172 ± 0.2

6.77 ± .008"

140 ± 0.2

5.51 ± .008"

RS-232-C/V.24

data interface

Interface X1 complies with the recommendations in EN 50 178 for separation

from line power.

Danger of electrical shock!

Unplug the power cord before opening the housing.

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

Danger to internal components!

Do not engage or disengage any connections while the unit is under power.

Use only original replacement fuses.

Primary-clocked power supply.

Voltage range 100 V to 240 V (–15% to +10 %) Frequency 48 Hzto 62 Hz

Power consumption typ. 8 W Line fuse F 1 A (in unit)

Minimum cross-section of power line: 0.75 mm

X31 (V.24/RS-232-C)

100 ... 240 V

50 ... 60 Hz

Ambient Conditions

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

)

Temperature range Operation: 0° C to + 45° C (32° F to 113° F)

Storage: –30° C to + 70° C (–22° F to 158° F)

Rel. humidity Annual average: < 75%; maximum: < 90%

Weight 1.5 kg

284249-25·SW24618101·3·3/2000·H·PrintedinGermany·Subjecttochangewithoutnotice

DR. JOHANNES HEIDENHAIN GmbH

Dr.-Johannes-Heidenhain-Straße 5

D-83301Traunreut, Deutschland

69) 31-0 .56832

69) 50

FAX

Service (0

69) 31-12

TNC-Service (0

69) 31-14

69) 98

http://www.heidenhain.de

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