Controlled Products Systems Group 4302-111 - Manual (Page 25)

4302-065-F-1-13 23
Under various entrapment conditions the operator will assume either a SOFT or HARD (alarm) shutdown. 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 or encountered an obstruction. If the gate stops at the open position, the operator will not
respond to the automatic close timer and a “manual input” is required to close the gate.
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 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.
Soft Shutdown
In some conditions, a soft shutdown will reset as soon as the entrapment condition clears. For example, if a
non-contact sensor (photo sensor) is sensing an obstruction, the operator will stop the gate and assume a soft
shutdown condition. When the photo sensor clears (Obstruction is no longer there), 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 input device, any standard safety input device 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.
• 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 - If a moving vehicle runs over a loop while the gate is cycling open and hits the opening gate, the
operator’s inherent entrapment protection is activated. The gate will reverse direction and run back to the
closed position. A soft shutdown condition does not occur and the loop provides an immediate reset of the
operator. Once the loop area is clear and another open command is given, the gate will cycle open.
Resetting a Soft Shutdown
Continued on next page.
2.5 Shutdown Conditions