This control device is connected to a master device and controls a drive target on the basis of the content of communication with the master device, and includes a communication unit which periodically transmits to and receives from the master device first information, which is information relating to control of the drive target, and second information, which is information relating to safety; a first processing unit which controls the drive target by processing the first information; a second processing unit which, by processing the second information, performs processing to ensure safety of the drive target; and an abnormality determining unit which determines that an abnormality has occurred if both the first information and the second information have not been processed within a prescribed period.

A programmable controller according to an embodiment includes a connection interface, a storage, and a controller. The connection interface can be connected with an external storage. The storage stores information for authentication. The controller accepts control for the programmable controller when the external storage is connected to the connection interface and the external storage is authenticated based on identification information stored in the external storage and the information for authentication.

Disclosed are a communication method between a master controller and slave controllers, a slave controller for the communication method, and a battery management system using the communication method and the slave controller, in which the master controller receives safety information about battery cells through a plurality of channels even when each of a plurality of slave controllers includes only one micro controller unit, thereby minimizing the increase in the cost and enhancing the safety of the battery management system. The communication method includes performing bidirectional communication between a master controller and first to N.sup.th (where N is an integer equal to or more than two) slave controllers through a first communication channel, and receiving, by the master controller, an indication signal through a second communication signal via the first to N.sup.th slave controllers.

An electrical interface module (IM) has a memory device MEM) for storing data and an integrated interface (IO) that provides data to an external reading device (RW). The electrical interface module (IM) contains a carrier (2) on which the memory device (MEM) and the integrated interface (IO) are arranged, the electrical interface module (IM) can exchange data and/or power with other electrical interface modules (IM) in the vicinity via the integrated interface, and adjacent electrical interface modules (IM) form a logical data bus via the integrated NFC interfaces, which can be addressed and/or controlled by at least one head module or a master module with a higher control and/or monitoring device.

An IO-Link master includes: an IO-Link communication port that communicates with an IO-Link device according to a predetermined communication protocol; a digital input port that receives a first signal value output from the IO-Link device; and a determiner that determines whether abnormality is generated in a digital input line connecting the digital input port to the IO-Link device based on a second signal value received with the IO-Link communication port and the first signal value.

A system and method are provided for controlling mastership among multiple devices in a fault tolerant manner. The devices may be configured to transmit and receive redundant heartbeat signals to indicate the mastership state of the device. The signals may operate in a plurality of configurations including active-master, ready and not-ready. By detecting the signal configuration sent from the other devices, each device is capable of managing its own transitions into and out of mastership in order to ensure that there is one and only one device functioning as master.

Provided are a device and method of setting a communication channel of an overhead hoist transfer (OHT), and a computer program stored in a recording medium to execute the method. The method of setting a communication channel of an OHT includes checking, by a master parallel input/output (PIO) provided in the OHT, a logistics transfer task command of the OHT, checking, by the master PIO, position information corresponding to the logistics transfer task command, based on the logistics transfer task command, checking, by the master PIO, unique number information of a slave PIO corresponding to the logistics transfer task command, based on the logistics transfer task command and the position information, and setting, by the master PIO, a communication channel between the master PIO and the slave PIO, based on the unique number information of the slave PIO.