HEIDENHAIN ND 231B Bedienungsanleitung

English (en)

12/2001

Measured Value Displays

User’s Manual

ND 231

SALES & SERVICE:

A Tech Authority, Inc.

13745 Stockton Ave.

Chino CA 91710

909-614-4522

[email protected]

Numeric keypad

with decimal point

Status display with

backlit indicators

Actual value and input display

(9 decades and algebraic sign)

HEIDENHAIN

789

456

123

0.CL

MOD

REF SET START PRINT inch

MIN ACTL MAX DIFF

Key Function

 Datum setting

 Confirming the entry value

 Setting display to value from P79 (P80!)

 xiting the parameter list

 Datum selection

 Paging backward in the parameter list

 Outputting the meas. value with PRINT

 Selecting parameters after switch-on

 Paging forward in the parameter list

 Clearing the entry

 Resetting the display to zero (P80!)

 CL plus MOD: Parameter list

 CL plus number: Selecting a parameter

 Clear parameter entry and show

parameter number

 Algebraic sign

 Decreasing the parameter value

 Decimal point

 Increasing the parameter value

MOD

Indicator Meaning

REF If the decimal point is blinking:

Display is waiting for the reference mark

to be traversed.

If the decimal point is not blinking:

Reference mark was traversed—

display unit saves the datum in nonvolatile

memory

Blinking: Display is waiting for operator

to press ENT or CL

inch Position values in inches

1 / 2 Selected datum

PRINT Measured value output with the MOD key

SET Blinking: Display is waiting for entry values

< / = / > Sorting mode: Measured value less than

lower limit / within tolerances / greater

than upper limit.

MIN

MAX / Nonfunctional

DIFF / ACTL /

START

Items Supplied with ND 231 B

Measured value display unit

ND 231B in benchtop housing

Two 11 µAPP encoder inputs Id. Nr. 344 993-xx

Power cable 3 m (9.9 ft)

User s Manual ND 231 B

Adhesive inserts For stacking the ND 231 B

This Manual describes the ND 231 B measured

value display units with software number

349 797-04

and higher. The software number is shown on a

label on the back panel of the housing.

Items Supplied

Installation and Specifications

Rear Panel, Accessories 13

Mounting 14

Power Connection 15

Operating Parameters 16

List of operating parameters 18

Linear Encoders 22

Multipoint Axis Error Compensation 25

Switching Inputs and Outputs EXT (X41) 29

Locking the Keyboard 34

Displaying the Software Version 35

Distance-to-Go Mode 36

RS-232-C/V.24 (X31) Data Interface 37

Input/Output of Parameter and

Compensation Value Lists

Output Format of the Parameter List 44

Output Format of the Compensation-Value Table 48

Remote Operation over the RS-232-C/V.24 51

Data Interface

Specifications 54

Dimensions 55

Contents

Working with the Display Unit

Position Encoders and Reference Marks 6

Switch-On, Traversing the Reference Points 7

Datum Setting 8

Sorting and Tolerance Checking 9

Measured-Value Output 10

Display Freeze 11

Error Messages 12

Scale in

linear encoder Distance-coded

reference marks

Position Encoders and Reference Marks

The ND 231 B display unit is intended for use with photo-

electrical linear encoders with sinusoidal signals: primarily

for HEIDENHAIN MT length gauges with 11 µAPP.

These length gauges have one reference mark. The scales of

other photoelectric linear encoders (see “Linear Encoders”) can

contain one reference mark or several

distance-coded

refer-

ence marks.

If there is an interruption of power, the relationship between the

position of the length gauge and the displayed position value is

lost. The reference marks on the position encoders and the REF

reference mark evaluation feature enable the display unit to

quickly reestablish this relationship again when the power is

restored.

When a reference mark is crossed over, a signal is generated

which identifies that position as a reference point. At the same

time, the display unit restores the relationship between length

gauge position and display values which you last defined by

setting the datum.

If the linear encoders have distance-coded reference marks,

you need only traverse a maximum of 20 mm to restore the

datum (for a signal period of 20 µm).

Reference mark

Reference marks on linear encoders

Position Encoders and Reference Marks

Switch-On, Traversing the Reference Marks REF Mode

Crossing over the reference marks automatically switches the

display to REF mode: The last assignment of display values to

length gauge positions is stored in nonvolatile memory.

1) Press the CL key if you choose not to cross over the

reference marks. Note that, in this case, the relationship

between length gauge position and display value will be lost if

the power is interrupted or if the unit is switched off.

Turn on the power.

(Switch is located on rear panel).

• Unit displays ND 231 B

for 2 seconds.

• Unit displays ENT...CL 1).

• REF indicator starts blinking.

Switch on the reference mark evaluation

function.

• The position value that was last

assigned to the reference mark

position is displayed.

• REF indicator lights.

• Decimal points start blinking.

Traverse the reference marks.

Move the plunger until the display starts

counting and the decimal points stop blink-

ing. The display is now ready for operation.

5 , 6 9 7

ENT...CL

For automation purposes, crossing over the reference marks

and the display ENT ... CL can be disabled with parameter P82.

Switch-On, Traversin the Reference Marks

Datum Setting

The datum setting procedure assigns a display value to a

known position. With the ND 200 series, you can set two

separate datum points.

There are several ways to set the datum:

• Enter a numerical value, or

• Transfer a value from an operating parameter

(see P79, P80), or

• By external signal

Select datum 1 or 2.

After datum setting: Assignment of measured values to

positions

Without datum setting: unknown assignment of measured

values to positions

Enter numerical value (here, 5).

You can switch between datums 1 and 2 as desired. Datum 2

can be used, for example, for working with incremental dimen-

sions.

When you switch back to datum 1, the display unit resumes

display of the MT's actual position.

Datum Settin

Confirm the entered numerical value.

Sorting and Tolerance Checking

In the sorting and tolerance checking mode, the display unit

compares the displayed value with the programmed upper and

lower sorting limits. The sorting and tolerance checking mode is

enabled and disabled with operating parameterP17.

Entering sorting limits

Sorting limits are entered in operating parameters P18 and P19

(see “Operating Parameters”).

Sorting signals

The display indicators and switching outputs at D-sub

connection EXT (X41, see applicable section) sort the display

value into one of three classes.

Display Meaning

=Measured value is within sorting limits

<Measured value is smaller than lower sorting limit

>Measured value is greater than upper sorting limit

Operating parameters for sorting and tolerance checking

P17 CLASS Sorting ON/OFF

P18 L.CLASS. Lower sorting limit

P19 U.CLASS. Lower sorting limit

Sortin and Tolerance Checkin

Example: Upper sorting limit = 26.02 mm

Lower sorting limit = 26.00 mm

Reject

Rework

HEIDENHAIN

REF

1 SET

START PRINT

in.

MIN ACTL MAX DIFF

789

456

123

0.–CL

MOD

Measured Value Output

The RS-232-C/V.24 interface (X31) enables you to connect a

printer or a PC to your display unit

Measured alue Output

For technical information on the RS-232-C/V.24 data

interface (X31), information on the data format, etc.,

see the chapter “RS-232-C/V.24 Interface (X31).”

Measured values can be transferred over the RS-232-C/V.24

interface (X31), for example to a printer or PC.

There are several ways to start measured value output:

Press the MOD key (note the parameter setting P86).

Input the command STX (Ctrl B) over the RXD input of the

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

Input a signal for measured data output (Pulse or Contact)

at the D-sub connection EXT (X41).

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