HEIDENHAIN ND 221 User manual

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6/ 2000
Measured Value Displays
User’s Manual
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2
Numeric keypad
with decimal point
Status display with indicators
Display of actual value and input
(9 decades with algebraic sign)
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    
     
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3
Indicator Meaning
REF If the decimal point is also blinking:
Display is waiting for reference mark
traversing.
If decimal point is not blinking:
Reference mark has been traversed—
display stores datum points in nonvolatile
memory.
Blinking: display is waiting for ENT or
CL to be depressed.
inch Position values in inches
1 / 2 Selected datum point
PRINT Measured value output with MOD key
SET Blinking: Display is waiting for input
values
MOD
Key Function
• Set datum
• Transfer input value
• Set display to value from P79 (P80!)
• Leave parameter list
• Select datum
• • Page backwards in parameter list
• Select parameter after switch-on
• • Page forward in parameter list
• Start measured value output “ PRINT”
• Delete entry
• Set display to zero (P80!)
• CL plus MOD: select parameter list
• CL plus number: select parameter
• Delete parameter input and show
parameter number
• Algebraic sign
• Reduce parameter value
• Decimal point
• Increase parameter value
< / = / > Without function
MIN / MAX /
DIFF/ ACTL /
START
4
This manual is for the ND 221 B measured value
display with the following software number or
higher: 349 797-01
The software number is indicated on a label on
the rear panel.
Items supplied
Items supplied with ND 221 B
Measured value display unit,
ND 221B benchtop model
Encoder input 11 µA
PP
Id.-Nr. 344 992-xx
Power cord 3 m (9.9ft)
User's Manual ND 221 B
Adhesive plug-in feet For stacking ND 221B units
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5
Working with the ND Display Units
Position Encoders and Reference Marks 6
Switch-On,Traversing Reference Marks 7
Datum Setting 8
MeasuredValue Output 9
Error Messages 10
Installation and Specifications
Rear Panel, Accessories 11
Mounting 12
Power Connection 13
Operating Parameters 14
List of Operating Parameters 16
Linear Encoders 19
NonlinearAxis Error Compensation 22
RS-232-C/V.24 Interface (X31) 26
Locking the Keypad 29
Displaying the SoftwareVersion 30
Distance-to-Go Mode 31
Specifications 32
Dimensions 33
Contents
Contents
6
Scale in Distance-coded
linearencoder reference marks
Position Encoders and Reference Marks
The ND 221 B display unit is designed for use with
photoelectrical linear encoders with 11 µA
pp
sinusoidal
signals: primarily for HEIDENHAIN MT length gauges with
11 µA
pp
.
The MT length gauges have one reference mark. The scales
of other photoelectric linear encoders (see "Linear Encoders")
can contain one reference mark or many distance-coded
reference 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.
To restore the datum on scales with distance-coded
reference marks, you only need to traverse a maximum of
20 mm (signal period: 20 µm).
Reference mark
Reference marks on linear encoders
Position Encoders and Reference Marks
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7
Switch-On,Traversing theReferenceMarks
REFMode
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 traverse 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 located on rear panel.)
• ND 221 B appears for two seconds.
•ENT...CL
1)
appears.
• REF indicator is blinking.
Switch-on the reference mark
evaluationfunction.
• The position value that was last
assigned to the reference mark
position is displayed.
• REF indicator lights up.
• Decimal point is blinking.
⇔
Cross over the reference mark.
Move the plunger until the display starts
counting and the decimal point stops
blinking. The display is now ready for
operation.
5,697
ENT...CL
0
➤➤
➤➤
➤
1
For automation purposes, crossing over the reference marks
and the display ENT ... CL can be disabled with parameter
P82.
Switch-On, Traversing the Reference Marks
8
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).
Select datum 1 or 2.
After datum setting: assignment of measured values to positions
Without datum setting: unknown assignment of measured values
to positions
Z
?
?
?
?
?
Z
5˜
0
10˜
15˜
20˜
Enter numerical value (here, 5).
5
Datum Setting
Confirm the entered numerical value.
You can switch between datums 1 and 2 as desired. Datum 2
can be used, for example, for working with incremental
dimensions.
When you switch back to datum 1, the display unit resumes
display of the encoder's actual position.
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9
MeasuredValueOutput
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 output 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 (check the parameter settings for P86).
or
➤➤
➤➤
➤Input the command STX (Ctrl B) over the RXD input of the
RS-232-C/V.24 interface (X31).
HEIDENHAIN
REF 2 1 SET START PRINT in.
MIN ACTL MAX DIFF
= < >
7 8 9
4 5 6
1 2 3
0.–CL
MOD
PC
Measured Value Output
The RS-232-C/V.24 interface (X31) enables you to connect a printer
or a PC to your display unit
10
Other error displays
If “ OVERFLOW” appears, the measured value is too large or
too small:
➤➤
➤➤
➤ Set a new datum.
or
➤➤
➤➤
➤ Traverse back.
To clear error messages:
Once you have removed the cause of the error:
➤➤
➤➤
➤ Clear the error message with the CL key.
Error Messages
Error Messages
Display Effect/Cause
RS232 FAST Command for measured value
output followed too quickly by
another.
1)
SIGNAL Encoder signal is too weak.
The scale may be contaminated.
1)
DSR.MISSING The connected device has not
sent a DSR signal.
1)
REF. ERR. The spacing of the reference
marks as defined in P43 is not the
actual spacing.
1)
FORMAT ERR. Data format, baud rate, etc. do not
match.
1)
FREQUENCY Input frequency too high for
encoder input. Traversing speed
may be too fast.
1)
MEMORY ERR. Checksum error: Check the datum,
operating parameters and com-
pensation values for nonlinear axis
error compensation. If this error
recurs, contact your service
agency!
1)
These errors are important for the attached device.
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11
Rear Panel, Accessories
Power
switch
Input X1 for one HEIDENHAIN
11 µA
pp
linear encoder
Data interface
Rear Panel
Ports X1 and X31 comply with the
recommendations in EN 50178 for separation
from line power.
Encoder input X1
HEIDENHAIN flange socket 9-pin
Input signals 11 µA
pp
Maximum encoder cable length 30 m (98.5ft)
Maximum input frequency 100 kHz
RS-232-C/V.24 data interface (X31)
25-pin D-sub connection (female)
Accessories
Connecting elements
Connector (male) 25-pin for D-sub connection X31
Id.-Nr. 245 739-ZY
Data interface cable, 3 m (9.9 ft), 25-pin for D-sub con-
complete nection X31, Id. Nr. 274 545-01
Ground connection
12
Mounting
You can fasten the ND 221 B from below by using M4 screws
(see illustration at right).
Hole positions for mounting the ND display unit
Alternatives of stacking the display units
172 ± 0.2
6.77 ± .008"
140 ± 0.2
5.51 ± .008"
ND 221 B display units are stackable. Adhesive plug-in feet
(supplied with your unit) prevent the stacked units from being
moved out of place.
1
5
°
Mounting
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13
Power Connection
The rear panel of the ND 221 B contains aconnecting jack for
a power cord with Euro connector (power cord supplied with
the delivery).
Minimum cross section of the power cord: 0.75 mm
2
Power supply: 100 Vac to 240 Vac (–15% to +10%)
50 Hz to 60 Hz (± 2 Hz)
A voltage selector is therefore not necessary.
Danger of electrical shock!
Unplug the power cord before opening the
housing. Connect the grounding conductor.
Do not interrupt the grounding conductor.
Danger to internal components!
Do not engage or disengage any connections while
the unit is under power. Use only original
replacement fuses.
To increase noise immunity, connect the ground
terminal on the rear panel to the central ground
point of the machine.
(Minimum cross-section: 6 mm
2
)
Power Connection
14
Operating Parameters
Operating parameters allow you to modify the operating
characteristics of your ND display unit and define the
evaluation of the encoder signals.
Operating parameters are designated by:
• the letter P,
• a two-digit parameter number, and
• an abbreviation.
Example: P01 INCH
The factory settings of the operating parameters are
indicated in the parameter list (see “List of Operating
Parameters” ) in boldface type.
Parameters consist of “user parameters” and “ protected
operating parameters,” which can only be accessed by
entering a code number.
User parameters
User parameters are operating parameters that can be
changed without entering the code number:
P00 to P30, P50, P51, P79, P86, P98
The functions of the individual user parameters are detailed in
the list of operating parameters (see “List of Operating
Parameters” ).
To access a user parameter ...
... after switching on the display:
Display first user parameter.
... during operation:
Display first user parameter.
To go directly to a user parameter:
Press and hold CL while entering the first
digit of the parameter number (here, 1).
Enter the second digit of the parameter
number (here, 2).
The display shows the selected user
parameter.
While ENT ... CL is
displayed:
MOD
Together:
Together:
MOD
Operating Parameters
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15
Functions for changing the operating parameters
Function Key
Page forward
in the list of operating parameters
Page backward
in the list of operating parameters
Reduce parameter value
Increase parameter value
Correct entry and
display parameter designations
Confirm change or numerical entry,
leave list of operating parameters
A changed parameter is stored as soon as you
• leave the list of operating parameters
or
• page forward or backward after the change.
MOD
Code number for changing protected operating
parameters
If you wish to change protected operating parameters, you
must first enter the code number 95 148:
➤➤
➤➤
➤ Select the user parameter P00 CODE .
➤➤
➤➤
➤ Enter the code number 95 148.
➤➤
➤➤
➤ Confirm entry with ENT.
Parameter P30 appears on the display. By paging through the
list of operating parameters you can display—and, if
necessary, change—each protected operating parameter and,
of course, each user parameter.
Once you have entered the code number, the
protected operating parameters remain accessible
until the display unit is switched off.
Operating Parameters
16
Parameter Settings / Function
P00 CODE To change the protected operating param-
eters, enter code number 95 148
P01 Units of measurement
Display in millimeters MM
Display in inches INCH
P11 SCL Scaling factor
Scaling factor off SCALING OFF
Scaling factor on SCALING ON
P12 SCL Scaling factor
Enter a numerical value
0.100000 < P12 < 9.999999
Default setting: 1.000000
P30 DIR Counting direction
Positive counting direction with
positive direction of traverse DIRECT. POS
Negative counting direction with
positive direction of traverse DIRECT. NEG
P31 S. PER. Signal period of encoder
0.000 000 01 < P31 < 99 999.9999 µm
Default setting: 10 µm
P33 COUNT Counting mode
0-1-2-3-4-5-6-7-8-9 COUNT 0-1
0-2-4-6-8 COUNT 0-2
0-5 COUNT 0-5
List of Operating Parameters
List of Operating Parameters
Parameter Settings/ Function
P38 DP POS Decimal places
1)
1 / 2 / 3 / 4 / 5 / 6
(up to 8 for inch display)
P40 COMP. Select encoder compensation
No compensation COMP. OFF
Nonlinear: up to 64 compensation points for
linear encoders NONL. COMP
Linear compensation COMP. ON
P41 L.COMP. Linear error compensation
–99 999.9 < P41 < + 99 999.9 [µm/m]
Default setting: 0
Example: Find input value for P41
Displayed measuring length .............L
a
= 620.000 mm
Actual length (measured, e.g.
with the VM 101 comparator
system from HEIDENHAIN)..............L
t
= 619.877 mm
Length difference ............................. ∆ L = L
t
– L
a
= – 123 µm
Compensation factor k (= P41):
k = ∆ L / L
a
= – 123 µm / 0.62 m........k = – 198.4 [µm/m]
1)
Depends on signal period (P31) and measuring unit (P01)
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17
Parameter Settings / Function
P51 RS232 Additional blank lines
during data output BK LINE 1
0 ≤ P51 ≤ 99
Default setting: 1
P79 PRESET Value for datum point
Enter numerical value for
datum setting with ENT key
80 ENT-CL Set display
No set/Set with
CL/ENT CL-ENT OFF
Zero reset with CL
Setting disabled with ENT CL......ON
Zero reset with CL and set with
ENT to value selected in P79 CL-ENT ON
P82 DISPL.ON Message after switch-on
ENT...CL message MESSAGE ON
No message MESSG. OFF
P86 MOD PRINT via MOD disabled PRINT OFF
PRINT via MOD enabled PRINT ON
Parameter Settings/ Function
P43 REF Reference marks
One reference mark SINGLE REF.
Distance-coded with 500 • SP
(SP: signal period) 500 SP
Distance-coded with 1000 • SP
(e.g. for HEIDENHAIN LS ...C) 1000 SP
Distance-coded with 2000 • SP 2000 SP
Distance-coded with 5000 • SP 5000 SP
P44 REF Reference mark evaluation
Evaluate the reference mark REF. ON
Do not evaluate the reference
mark REF. OFF
P45 ALARM Encoder monitoring
No monitoring ALARM OFF
Monitor the frequency FREQUENCY
Monitor contamination CONTAMINAT.
Contamination + frequency FRQ. + CONT.
P50 RS232 Baud rate
110 / 150 / 300 / 600 / 1200 /
2 400 / 4 800 / 9 600 / 19 200 /
38 400 baud
List of Operating Parameters
18
List of Operating Parameters
Parameter Settings / Function
P98 LANGUA. Conversational language
German LANGUAGE D
English LANGUAGE GB
French LANGUAGE F
Italian LANGUAGE I
Dutch LANGUAGE NL
Spanish LANGUAGE E
Danish LANGUAGE DK
Swedish LANGUAGE S
Finnish LANGUAGE FI
Czech LANGUAGE CZ
Polish LANGUAGE PL
Hungarian LANGUAGE H
Portuguese LANGUAGE P
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