4.2 Shutdown Conditions 4.2.1 Soft Shutdown 4.2.2 Resetting a Soft Shutdown
Under various entrapment conditions the operator will assume either a soft or hard shutdown (alarm)
condition. To determine what type of reset action is required, you will need to understand how the
different entrapment conditions affect the gate operator.
This occurs in various situations where the inherent or secondary entrapment protection devices have
been activated. In a soft shutdown condition, the operator will not respond to any input that was
present when the entrapment protection device sensed an obstruction. If the gate stops at the open
position, the operator will not respond to the automatic close timer.
Example 1: A time clock keys the gate open in the morning and an entrapment protection device
senses an obstruction prior to the gate reaching the full open position. If the entrapment is sensed by
the inherent system, the gate will reverse and run back to the closed position. The time clock input is
still present, but the gate will not re-open.
NOTE: In some systems, the time clock input comes from the telephone entry system relay. This
same relay may also provide open commands for a card reader, MicroPLUS transmitters and the
visitor telephone entry. If so, these devices will also be disabled in a soft shutdown condition.
Example 2: If the gate is closing and an entrapment protection device is activated, the gate will either
stop or reverse and run back to the open position, depending upon if the secondary or inherent
device was activated. The automatic close timer will not close the gate.
Example 3: Vehicle arrives at open loop and the gate runs towards the open position. The inherent
entrapment protection is activated. The gate reverses and runs back to the closed position. If the
vehicle is still present at the open loop a soft shutdown condition does not occur. The loop input
provides an immediate reset of the operator and the gate will again run to the open position.
In some conditions, a soft shutdown will reset as soon as the entrapment condition clears. For
example, if a non-contact sensor (photo cell) is sensing an obstruction, the operator will stop the gate
and assume a soft shutdown condition. When the photocell clears, the operator will return to normal
operation.
When the operator is in a soft shutdown, activation of any "intended input" will reset the operator. An
"intended input" includes any command, any standard safety input and any loop input. Activating any
of these inputs will reset the gate. At that point the gate will return to normal operation. If the gate is
open, the automatic close timer will then time out and close the gate.
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