A control system for a flow rack unit for providing stock material units in at least two rack bays, wherein the control system comprises at least two sensor arrangements and a control unit; wherein the sensor arrangements are connected to the control unit via a common data line; wherein the sensor arrangements each comprise an occupancy sensor configured as a distance sensor; wherein the occupancy sensors are configured to be respectively associated with one of the rack bays and to be arranged at a storage side of the associated rack bay such that a measurement zone of the respective occupancy sensor is aligned from the storage side of the rack bay in the direction of a removal side of the rack bay disposed opposite the storage side to measure a distance from a rearmost stock material unit stored in the associated rack bay and closest to the occupancy sensor; wherein each occupancy sensor is configured to transmit distance data representing the measured distance via the data line to the control unit to detect a number of stock material units stored in the rack bays in the control unit, characterized in that, in each sensor arrangement, the occupancy sensor is configured to detect a placement of a stock material unit to be placed at the storage side of the associated rack bay and to transmit load sensor data indicating the placement via the data line to the control unit, or, in each sensor arrangement, a load sensor is additionally present which is configured to detect a placement of a stock material unit to be placed at the storage side of the associated rack bay and to transmit load sensor data indicating the placement via the data line to the control unit, or, in some of the sensor arrangements, the occupancy sensor is configured to detect a placement of a stock material unit to be placed at the storage side of the associated rack bay and to transmit load sensor data indicating the placement via the data line to the control unit, and, in the remaining sensor arrangements, a load sensor is additionally present which is configured to detect a placement of a stock material unit to be placed at the storage side of the associated rack bay and to transmit load sensor data indicating the placement via the data line to the control unit. wherein the control system comprises at least two sensor arrangements and a control unit; wherein the sensor arrangements are connected to the control unit via a common data line; wherein the sensor arrangements each comprise an occupancy sensor configured as a distance sensor; wherein the occupancy sensors are configured to be respectively associated with one of the rack bays and to be arranged at a storage side of the associated rack bay such that a measurement zone of the respective occupancy sensor is aligned from the storage side of the rack bay in the direction of a removal side of the rack bay disposed opposite the storage side to measure a distance from a rearmost stock material unit stored in the associated rack bay and closest to the occupancy sensor; wherein each occupancy sensor is configured to transmit distance data representing the measured distance via the data line to the control unit to detect a number of stock material units stored in the rack bays in the control unit, characterized in that, in each sensor arrangement, the occupancy sensor is configured to detect a placement of a stock material unit to be placed at the storage side of the associated rack bay and to transmit load sensor data indicating the placement via the data line to the control unit, or, in each sensor arrangement, a load sensor is additionally present which is configured to detect a placement of a stock material unit to be placed at the storage side of the associated rack bay and to transmit load sensor data indicating the placement via the data line to the control unit, or, in some of the sensor arrangements, the occupancy sensor is configured to detect a placement of a stock material unit to be placed at the storage side of the associated rack bay and to transmit load sensor data indicating the placement via the data line to the control unit, and, in the remaining sensor arrangements, a load sensor is additionally present which is configured to detect a placement of a stock material unit to be placed at the storage side of the associated rack bay and to transmit load sensor data indicating the placement via the data line to the control unit.