A load control device for controlling an amount of power delivered from an alternating-current (AC) power source to an electrical load may be configured to determine if a miswire condition exists at the load control device. For example, a control circuit of the load control device may be configured to detect a hot-to-dimmed-hot miswire condition in which a dimmed-hot terminal may be coupled to a hot side of the AC power source and a hot terminal may be coupled to the electrical load. In addition, the control circuit may be configured to detect a neutral-to-accessory-terminal miswire condition in which the hot terminal may be coupled to the hot side of the AC power source and an accessory terminal may be coupled to a neutral side of the AC power source. The control circuit may maintain a controllably conductive device non-conductive in response to determining that one of the miswire condition exists.

A system comprises: electronic apparatuses; a management apparatus comprising a connection positional relation database for managing connection positional relations of the ports of the electronic apparatus; and an information communication terminal. The management apparatus acquires disconnection target port information from the information communication terminal and thereby reads information related to the disconnection target port from the connection positional relation database to transmit to the electronic apparatus. The electronic apparatus transmits a visible light signal to outside based on the information related to the disconnection target port. The information communication terminal displays the information related to the disconnection target port based on the visible light signal.

A module is described which is slidably attachable to a controller. Resource wires are connected to the module through resource connectors. The module has a circuit board that can perform actions. The module can modify the function of its resource connectors. These modifications may be to meet the requirements of resources that are to be connected to the module. The module may be able to register, by means of a signal, when a correct resource wire is attached to the module. The results of such monitoring may be displayed on a screen associated with the controller.

A module is described which is slidably attachable to a controller. Resource wires are connected to the module through resource connectors. The module has a circuit board that can perform actions. The module can modify the function of its resource connectors. These modifications may be to meet the requirements of resources that are to be connected to the module. The module may be able to register, by means of a signal, when a correct resource wire is attached to the module. The results of such monitoring may be displayed on a screen associated with the controller.

A method and system for operating an inverter, which has a terminal with four conductor connectors for connection of the inverter to three outer conductors and to a neutral conductor of an AC voltage grid is disclosed. The method includes determining a connection configuration of the inverter to the AC voltage grid by actuating switching elements of a bridge circuit of the inverter to generate a zero-phase sequence system having a zero-phase sequence system current, and measuring and evaluating output currents of the inverter with respect to the zero-phase sequence system current. The method also includes identifying a presence of a connection of the neutral conductor to a conductor connector provided for connection to the neutral conductor when the zero-phase sequence system current exceeds a prescribed threshold value and identifying that the neutral conductor is not connected to the conductor connector provided for connection to the neutral conductor otherwise.

A method for detecting an open resolver exciter line (10) comprises the following steps:measuring the signal voltages U.sub.s and U.sub.c of the sine coil (17) and the cosine coil (18) of the resolver (15);comparing the amplitude U.sub.s.sup.2+U.sub.c.sup.2 of the resolver signal to a first threshold value C.sub.S1;starting a diagnostic mode having the following steps if the amplitude U.sub.s.sup.2+U.sub.c.sup.2 does not reach the first threshold value C.sub.S1;applying a constant voltage to the exciter line (11, 12) via a series resistance (25) R.sub.LE that is large compared to the ohmic resistance of the exciter coil (16) R.sub.E;measuring the voltage difference U.sub.E(t.sub.1) at the terminals (5, 6) of the exciter line at a number of points in time t.sub.i during at least one excitation period; anddetermining the DC voltage component U.sub.E,Offs of the voltage difference U.sub.E;determining that there is an open exciter line (10) if, during the excitation period, the DC voltage component U.sub.E,Offs is larger than a second threshold value C.sub.S2.

Tools and techniques are described to create an interface that can translate a device language into an internal language, and describe the device to the controller in terms of actors and quanta such that when a device is attached to a controller, the controller can understand what the device does and why it does it. This internal language can then be translated back to a natural language, such as English. This allows the controller to track errors, determine what upstream or downstream device and action of the device caused the error, and to track many different facts of the system that allow for detailed reports.

Tools and techniques are described to create an interface that can translate a device language into an internal language, and describe the device to the controller in terms of actors and quanta such that when a device is attached to a controller, the controller can understand what the device does and why it does it. This internal language can then be translated back to a natural language, such as English. This allows the controller to track errors, determine what upstream or downstream device and action of the device caused the error, and to track many different facts of the system that allow for detailed reports.

A building controller with wiring terminals that has a moveable interactive screen is disclosed. The moveable interactive screen, when closed, covers the housing that holds the wiring terminals. The specific devices attached to specific terminals and the state of the devices can be displayed on the closed moveable interactive screen. Using the moveable interactive screen, a user can set up the expected devices and their protocols that will be attached to specific wiring terminals within the building controller. The controller wiring terminals can be viewed along with an interactive diagram of the devices and the terminals that have been set up for the building controller can be viewed simultaneously when the moveable interactive screen is in the open position.

A building controller with wiring terminals that has a moveable interactive screen is disclosed. The moveable interactive screen, when closed, covers the housing that holds the wiring terminals. The specific devices attached to specific terminals and the state of the devices can be displayed on the closed moveable interactive screen. Using the moveable interactive screen, a user can set up the expected devices and their protocols that will be attached to specific wiring terminals within the building controller. The controller wiring terminals can be viewed along with an interactive diagram of the devices and the terminals that have been set up for the building controller can be viewed simultaneously when the moveable interactive screen is in the open position.