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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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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)
- Page 2 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 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...
- Page 6 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 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.
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Page 8: Ambient Conditions
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.
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