<![CDATA[The development of industrial automation systems demands improvements in safety, efficiency, and production process quality, particularly in the conveyor line assembling area, which is at risk of process failures due to work sequence errors, improperly installed components, and human error. This study aims to analyze the implementation of a Programmable Logic Controller (PLC)-based interlock system as a preventive measure against production process failures in the conveyor line assembling area. The research employed a quantitative experimental approach through field observation, literature review, interviews, interlock logic design using Ladder Diagrams on an Omron CP1L PLC, and system testing using a photoelectric sensor as the main input. The test results showed that the photoelectric sensor was able to consistently detect objects up to a distance of 20 cm with an 80% success rate and an average response time of 0.443 seconds. The interlock system was able to provide appropriate responses in 8 out of 10 test scenarios, equivalent to an 80% success rate, including automatically stopping the conveyor when a disturbance occurred and activating a warning alarm. The implementation of the interlock system also succeeded in reducing the percentage of non-conforming (NG) products from 1.88% to 0.20%, representing an 82.8% reduction out of a total of 13,700 production units over four weeks of observation. Overall, the effectiveness level of the interlock system reached 99.91%, with 13,688 units successfully passing through all process stages without disruption. Based on these results, it can be concluded that the PLC based interlock system is effective as an automatic safety system for improving the reliability, safety, and efficiency of the production process in the conveyor line assembling area.]]>
Copyrights © 2026
