| 摘要 |
A force reversal value for an installed moveable barrier (110) is identified. The force reversal value is compared to a predetermined threshold. When the comparison indicates that the force reversal value exceeds the predetermined threshold, the operation of the moveable barrier operator (102) is halted. A secondary safety device (116, 118) can then be installed and, responsive to the installation, the operator can be reenabled. |
