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 (WPC) relative to the conveyor , the stop device comprising: a stop control detection device , configured to detect a presence of a workpiece carrier (WPC), arriving at the detection device and/or to detect presence of a workpiece on the workpiece carrier (WPC), and a stop control actuation device , configured to stop the workpiece carrier's (WPC) movement relative to the conveyor , a tag reader and writer ; and a stop local controller , operatively connected to the stop control detection device , to the stop actuation device and to the tag reader/writer , to receive a detection signal from the stop control detection device , 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 , 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 , configured to detect a presence of a workpiece carrier (WPC), arriving at the detection device and/or to detect presence of a workpiece on the workpiece carrier (WPC), and a stop control actuation device , configured to stop the workpiece carrier's (WPC) movement relative to the conveyor , a tag reader and writer ; and a stop local controller , operatively connected to the stop control detection device , to the stop actuation device and to the tag reader/writer , to receive a detection signal from the stop control detection device , 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 , 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 , 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. <EOS>