The project entailed the PDR’s to be positioned at designated points along the reclaimer and at the control site. So that the operator could monitor and control the production and transfer volumes of there raw material. The PDR’s was used as a replacement for there tiring cable communication system, due to its high over air data transfer rate and ability to be both master and repeater. 

Stacker/Reclaimers can be found in cement, power, steel industries where bulk movement/storage is needed. Stackers receive material from other stockyard equipment via a conveyor network and deposit it in a bunker or pile. Reclaimers remove the same material and deliver it to other stockyard equipment via a conveyor network.

It is very important to have information such as movement of stacker/reclaimer to control room while in operation. For example, if reclaimer is to be to started, the reclaimer yard conveyor has to be started first and the same signal is to be given to the reclaimer. In the same way, the stacker yard conveyor has to be started after starting the stacker machine only.  So stacker running signal is sent to the Central Control Room(CCR), which in turn, sends signal to stacker yard conveyor. If there is a delay in these signals then tippler chute will get clogged. The main requirement of the signal interlocking is to prevent the clogging of both machine. To read more please click the pdf below