Automated system and control device for identifying a connecting element

An automated system comprising:

• a communication network;
• a programmable control unit for providing signaling information;
• and
• a modular bus subscriber that is connectable to one or more additional modular bus subscribers via the communication network, the modular bus subscriber having the following features:
• multiple groups of connecting elements, a display element being associated with each group of connecting elements, and a sensor or actuator being connectable to each group of connecting elements, and an evaluation and control unit for actuating at least one selected display element in response to the signaling information provided by the programmable control unit, wherein for performing a wiring check and/or for identifying components that are malfunctioning or in need of replacement, in a test mode, the evaluation and control unit blocks the group of connecting elements associated with the at least one selected display element from transferring any data to and from the sensor or actuator connected to the group of connecting elements during the test mode in response to the signaling information.