Lester Controls ALMEGA2 Quick Setup Manual page 4

iii. CEDES
15. FURTHER INFORMATION FOR USE WITH AN OVERSPEED GOVERNOR ENCODER (If fitted)
a. Resetting the Absolute Position:
It may be necessary to reset the absolute position of the lift for the following reasons:
i. Excessive Correction:
ii. Clear Correction Levels:
Select option MENU->POSITIONING SYSTEM INFO-> RSET ENCODER POSITION ->YES to
reset the absolute position of the encoder to the position of the bottom floor level.
b. Correction Point Moved: It is vital that correction points do not move once set after a learn run.
IT IS STRONGLY RECOMMENDED THAT CORRECTION SENSOR / POINTS ARE FIXED
SO THAT THEY DO NOT MOVE. If they do move they will affect floor levels to the amount
moved (i.e. 30mm UP if moved 30mm UP etc). Rectify by (v) "Corr Fault Info" (as below)
c. Correction Point Missing: If a correction point is not found the event "CORRECT POINT
MISSING" is generated in the event logger, and the position error will NOT be corrected! This can
be caused by (i)-(v) as "Corr Fault Info" (as below).
d. Correction Point exceeded: If the level of correction is exceeded, the event "POS DEV CORR
EXCEEDED" is generated in the event logger, and the position error will NOT be corrected! The
level in the software is typically set to 50mm. This can be caused by (iv) or (v) as "Corr Fault Info"
(as below).
e. Correction Fault Info: When the lift has arrived at its destination it looks for a correction point
before stopping. If missing / exceeded the lift will still operate as normal but floor levels will
slowly drift over time (due to rope slip) until the appropriate action [as below] is taken.
i. Corr Point missing
ii. Corr Sensor Failed
iii. Floor Level adjusted > half corr vane length (i.e. >150mm for a 300mm vane) [move corr
point central then new learn run].
iv. Excessive OSG Rope Slip i.e. the OSG trips and the rope slips [move rope back, or reset
abs posn, or new learn run]
v. Corr Sensor Moved
f. Correction
CORRECTION INFO to view the current correction information. From this menu correction levels
can be viewed for each floor. A test would be to run the lift to each floor and the current level
should be similar for each floor. If one is vastly different to all the rest then typically the correction
point for that floor has moved.
g. Position Device Power Output: Typically the position encoder will be powered through a relay
output from the micro processor. This is to reset the encoder under communications failure by re-
cycling the power. If a communications lost condition is detected this output will de-energise every
10 seconds for 2 seconds to re-cycle the power.
CD 617 ISSUE 1 : 27/07/2020
= APS Status / Errors /Warnings / CAN Information
See below
With the lift physically at the bot flr level, select to clear.
[re fit corr point]
[new sensor]
[Move back, or new learn run]
information: Select option MENU->POSITIONING
4
SYSTEM INFO->