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HEIDENHAIN
Working with the measured
value display unit
Actual value and input display
(7-segment LED,
9 decades and sign)
REF
HEIDENHAIN
Status display
• Go to parameter list after switch-on
• Page forward in parameter list
Indicator
REF
in.
1 /
2
SET
• Select datum
• Page backward in
1
2
SET
Meaning
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.
Position values displayed in inches.
Datum 1 / Datum 2 currently active.
Blinking: Waiting for operator to confirm entry values.
parameter list
in.
• 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
ND 221
• Confirm entry value
• Set display to value from
P79 (P80!)
Numeric keypad
7
4
1
MOD
0
CL
8
9
5
6
2
3
.
–
• Algebraic sign
• Decrease pa-
rameter value
• Decimal point
• Increase pa-
rameter value
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Table of Contents
Related Manuals for HEIDENHAIN ND 221
Summary of Contents for HEIDENHAIN ND 221
- Page 1 HEIDENHAIN Working with the measured ND 221 value display unit • Confirm entry value • Set display to value from Actual value and input display • Select datum P79 (P80!) (7-segment LED, • Page backward in 9 decades and sign)
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Page 2: Setting The Datum
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. -
Page 3: Operating Parameters
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... - Page 4 Example: Displayed measuring length L a = 620.000 mm Actual length (determined with, for example, the VM 101 comparator system from HEIDENHAIN) L t = 619.876 mm Length difference ∆L = L t – L a = –124 µm Compensation factor k:...
- Page 5 Parameter Settings for HEIDENHAIN Linear Encoders Model P 43 Display step The following settings (unit: P01) apply for mm: inches Subdi- Count. Decimal vision mode places single 0,0005 0,00002 MT xx01 0,0002 0,00001 0,0001 0,000005 LIP 401 none 0,00005 0,000002...
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Page 6: Data Output
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). -
Page 7: Error Messages
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. -
Page 8: Rear Panel
100 ... 240 V data interface 50 ... 60 Hz Power switch Ground terminal Input for HEIDENHAIN linear encoder with sinusoidal output signals (7µA to 16 µA connecting cable max. 30 m (98.5 ft), maxi- mum permissible input frequency 100 kHz Interface X1 complies with the recommendations in EN 50 178 for separation from line power.