Installation
9
Limit #1 and Limit #2
Limit #1 and Limit #2 are outputs from SmarTraq to the elevator controller. Either or both may
be used to provide a variety of features including:
• Bypass retiring cam contact for controllers that use a retiring cam contact paralleled with a
door position contact in door open logic
• Limited door reversal
• Advance start
The Limit 2 output may be programmed to activate anywhere between the full close and full
open position. The Limit 1 output may only be programmed to activate between 50% closed and
full closed. Each limit relay is provided with a form “C” contact that can be wired in a Normal
Open or Normal Closed configuration. Both Limits have loss-of-power memory of On or Off sta-
tus. Position memory is restored with the first full open door operation after power is restored.
Limit #1 is adjusted using the “LP” parameter.
Limit #2 is adjusted using the “LC” parameter.
Limit #1 and Limit #2 must NOT be used to remove the door open and door close signal to
SmarTraq. Doors must reach full open position and generate DOL electronically before
removing the door open signal to the drive. Doors must reach full close position and gener-
ate DCL electronically before removing the door close signal to the drive.
Car Door Bumpers
All door operators must have both open and close bumpers. For proper operation, it is very
important that car door bumpers are in good shape and securely mounted. Doors must stop on
the open door bumper at full open position and on the close door bumper in full closed position.
It is also very important that car doors stop on car door bumpers at every
floor.
Hoistway Door Bumpers
Because it is very important that car doors stop on car door bumpers at every floor, make sure
hoistway door bumpers, if provided, do not stop car doors before car door bumpers.
Belt, Cable and Chain Tension
Belts, cables, and chains must be tensioned properly, much tighter than normally expected.
Belts must
be in good shape. If after tension adjustment at proper torque, belts still slip, they
must be replaced. Secondary drive V-belts on MAC and Dover Door Operators tend to slip, this
is why GAL and ECI use a chain as part of their design. The belt type should be changed from a
simple, V-belt to a more robust grip type V-belt with notches and additional traction provided
on the sides of the belt. With closed-loop control, power transmission from the motor/encoder
to doors must have minimum elasticity, slack, and slippage.
To Next Page
Loading...