Switch device system, switch device apparatus, computer program product

摘要

A system includes a switch operation unit configured to be mechanically operated to be in on or off state; a detecting unit configured to detect whether the switch operation unit is in on or off state; a first mechanism configured to close electrical contacts of at least one circuit when the switch operation unit is operated to be in on state; a second mechanism configured to maintain the contacts in closed state and switch the contacts to open state in response to electrical signals of off, on, and, off while the switch operation unit is in off state when the switch operation unit is operated to be in off state; and a first unit configured to notify a user of an abnormal state when the contacts are in the closed state and the switch operation unit is in off state at start of control.

主权项

1. A switch device system comprising a switch device, the switch device comprising:
a switch operation unit configured to be mechanically operated so as to be in an on state or an off state; a detecting unit configured to detect whether the switch operation unit is in the on state or the off state; a first mechanism configured to close electrical contacts of at least one circuit when the switch operation unit is operated to be in the on state from the off state; a second mechanism configured to maintain the electrical contacts in a closed state initially and then switch the electrical contacts from the closed state to an open state in response to electrical signals indicating off, on, and, off to be received sequentially when the switch operation unit is operated to be in the off state from the on state; and a first unit configured to notify a user of an abnormal state when it is detected that the electrical contacts are in the closed state and the switch operation unit is in the off state at start of control of the switch device system.