
2 MAN-NMG2-E-V5.14-070203 ASM GmbH
In the automatic measurement mode (MULTIPLE [8] pushed) the safety distance
of the safety equipment (2-hand control, light curtain etc.) can be calculated. If the
hand speed is not zero in the basic setting, the safety margin is calculated from the
max. stop time. A number of measurements can be set.
The following formula is used:
s = gr · (t1 · F1 + t2) + F2 with
s= Safety distance in mm
gr = approach speed (adjustable in steps of 100 mm/s).
t1 = Measured stop time
F1 = Proportional addition factor for stop time (adjustable from
100 up to 200 %). Designated as [F1] in the basic setting
F2 = Addition to the safety distance (adjustable in steps of 10 mm)
t2 = Addition to the stop time (adjustable in steps of 10 ms)
Corresponds to the reaction time of the safety equipment
Examples:
The up-to-date valid standards and minimum safety distances must always be ob-
served.
1. 2-hand control with cover (see EN ISO 13855)
gr = 1600 mm/s; F1 = 100 %; F2 = 0 mm; t2 = 0 ms
2. Light curtain with a resolution ≤14 mm (see EN ISO 13855)
gr = 2000 mm/s; F1 = 100 %; F2 = 0 mm (depending on the sensor detection
ability); t2 = 20 ms (resp. other reaction time of the ESPE*).
* Electro Sensitive Protective Equipment
3. Interlocking device associated with guards (see EN ISO 13855)
gr = 1600 mm/s; F1 = 100 %; t2 = 0 ms; F2 = 0 mm (depending on the aperture)
Basic Setting of the Formula Parameters
The button TEST RUN/ADJUST must be set to ADJUST. Press the ZERO button
(and hold), set the button TEST RUN/ADJUST to TEST RUN and then release the
ZERO button.
Both displays show FUNC;END. Turn the jog wheel clockwise until [gr] will appear].
Press the ZERO button to achieve the setting mode for the hand speed, which can
be adjusted now with the jog wheel. Then press the ZERO button. Now FUNC;END
appears again.
After selection with the jog wheel set the parameters F1, F2 und t2 in the same
way.
In addition a number of measurements can be set (parameter n). For n=0 the auto-
matic measurement mode will be terminated by pressing ADJUST.
Press the button TEST RUN/ADJUST to leave the setting mode.
Calculation of the
Safety Distance
and setting of the
parameters
(presentable via
printer or RS-232)
Example:
Automatic Measurement with Safety Distance Calculation
Set the NMG2 in the automatic measurement mode (SINGLESHOT/MULTIPLE
pressed, button TEST RUN/ADJUST released). The printout shows the header with
the assigned formula parameters. Start the machine. The machine will be stopped
and the stop contact will be released. Proceed to the assigned number n of mea-
surements, then terminate the automatic mesurement by setting the button TEST
RUN/ADJUST to the ADJUST position. Minimum and maximum stop time will be
determined and printed. The safety distance will be calculated by the max. stop time
and the given formula parameters and then be printed.
NMG2
Quick Reference
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