A stop device for use in a conveyor system, which is configured to transport a plurality of workpiece carriers by means of an endless conveyor, the device being configured for stopping a movement of one of the workpiece carriers relative to the conveyor (10, 10a, 10b, 10c, 10d), the stop device comprising: a stop control detection device (31, 32, 33), configured to detect a presence of a workpiece carrier, arriving at the detection device (31, 32, 33) and/or to detect presence of a workpiece on the workpiece carrier, and a stop control actuation device, configured to stop the workpiece carrier's movement relative to the conveyor (10, 10a, 10b, 10c, 10d), a tag reader and writer; and a stop local controller, operatively connected to the stop control detection device (31, 32, 33), to the stop actuation device and to the tag reader/writer, to receive a detection signal from the stop control detection device (31, 32, 33), to send a control signal to the stop control actuation device, and to receive/send tag data from/to the tag reader/writer; wherein the stop local controller is configured to: receive a sensor signal from the stop control detection device (31, 32, 33), control a stop control actuator to stop the workpiece carrier in response to the sensor signal, receive tag data from the tag reader/writer, communicate the sensor data corresponding to the sensor signal and the tag data to a central controller in the form of a stop event message, receive a stop control command from the central controller, said command comprising an indication to release the workpiece carrier and/or an indication on data to write to the tag, and control the stop control actuator to release the workpiece carrier. a stop control detection device (31, 32, 33), configured to detect a presence of a workpiece carrier, arriving at the detection device (31, 32, 33) and/or to detect presence of a workpiece on the workpiece carrier, and a stop control actuation device, configured to stop the workpiece carrier's movement relative to the conveyor (10, 10a, 10b, 10c, 10d), a tag reader and writer; and a stop local controller, operatively connected to the stop control detection device (31, 32, 33), to the stop actuation device and to the tag reader/writer, to receive a detection signal from the stop control detection device (31, 32, 33), to send a control signal to the stop control actuation device, and to receive/send tag data from/to the tag reader/writer; wherein the stop local controller is configured to: receive a sensor signal from the stop control detection device (31, 32, 33), control a stop control actuator to stop the workpiece carrier in response to the sensor signal, receive tag data from the tag reader/writer, communicate the sensor data corresponding to the sensor signal and the tag data to a central controller in the form of a stop event message, receive a stop control command from the central controller, said command comprising an indication to release the workpiece carrier and/or an indication on data to write to the tag, and control the stop control actuator to release the workpiece carrier. receive a sensor signal from the stop control detection device (31, 32, 33), control a stop control actuator to stop the workpiece carrier in response to the sensor signal, receive tag data from the tag reader/writer, communicate the sensor data corresponding to the sensor signal and the tag data to a central controller in the form of a stop event message, receive a stop control command from the central controller, said command comprising an indication to release the workpiece carrier and/or an indication on data to write to the tag, and control the stop control actuator to release the workpiece carrier.