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HEIDENHAIN Working with the position ND 286 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) Numeric keypad...
The ND 286 position display unit is designed for use with HEIDENHAIN linear or rotary encoders with square-wave output signals. These encoders have one or more reference marks, which may also be distance-coded . When a reference mark is crossed over, it generates a signal identifying that position as a reference point.
Measuring Series The ND 282 display unit can calculate and display one of the following values from a measuring series: Smallest value (MIN), largest value (MAX), difference between largest and smallest value (DIFF), last value measured (ACTL) A new value is captured every 550 µs during a measuring series. To start a measuring series: Press the MOD key repeatedly until the desired indicator starts blinking.
Output instantaneous values referenced to datum 1 (MIN/MAX/DIFF display values are not output) A connecting cable (to a PC, for example) is available from HEIDENHAIN (Id.-Nr. 206 420 ..); cable length up to 10 m (32.8 ft). Operating parameters for data output: P23, P53 to P57 “...
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D-Sub Connection EXT (25-pin, male) Danger to internal components! Voltage sources for external circuitry must conform to the recommendations in EN 50 178 for low-voltage electrical separation. Connect inductive loads only with a quenching diode parallel to the inductance. Use only shielded cable! Connect the shield to the connector housing.
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. Erase the operating parameters. If all decimal points light up, the measured value is too large or too small.
Operating Parameters The parameters are divided into “user parameters“ and “protected operating parameters," 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, P79, P86 Calling user parameters To call user parameters immediately after switch-on: Press the MOD key as long as...
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Fast external reset/preset Fast Set repeated (setting of P53: external REF mode, datum 2 and reset/preset measuring series are not usable No fast preset Parameter Settings for HEIDENHAIN Linear Encoders Model Signal Reference P 43 Display step The following settings period marks...
100 ... 240 V 50 ... 60 Hz Power switch Ground connection Input for HEIDENHAIN linear encoder with square-wave output signals (TTL), connecting cable max. 50 m (164 ft), minimum edge separation 175 ns The X1, X33 and X41 interfaces comply with EN 50 178 recommendations for separation from line power.