562400-000, Issue 1.3 January 2022
Page 43 of 61
7.5.5. Machine Envelope Controller (MEC) - Slew and Virtual Wall
If the equipment enters the approach limit* a ‘Close to
slew limit’ message will appear, the internal alarm will
beep and the amber LED will be lit.
PME 405 only — if the equipment is nearing the
limit, but has not yet reached it, the appropriate
motions will be slowed progressively until the limit is
reached.
MEC systems will cut motion
to any section of equipment
that has reached a limit but
allow other sections to
operate unhindered unless
they too reach the set limit.
If the equipment reaches the limit, the appropriate motion will be controlled.
The safe directional indicators will be red.
Unsafe motion is indicated by RED
arrows/triangles, safe motion is indicated by
GREEN arrows/ triangles
PME 405 only: AMBER arrows indicate that
motion is slowed in that direction
The red LED will flash
The internal alarm will sound
A warning message will be displayed
The approach limit is configurable at point of calibration, check system operation before commencing
work.
See sections 4.1 and 7.1 or hydraulic override details.
Once the limits are set, the internal alarm will sound and the RED LED
will light if the equipment reaches either limit. Always check that the
current limit activates at the set points. The restriction cannot be
deactivated if in the alarm state. Do not travel once a slew limit has
been set. Observe the operational limitations given in section 4.
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