Optimizing Material Handling with Automated Vertical Reciprocating Conveyors
JK Fenner transformed a conventional Vertical Reciprocating Conveyor (VRC) into a safer, more efficient material handling system through PLC, Hybrid HMI, and P2 VFD automation. The upgrade enabled precise floor-level positioning, integrated safety interlocks, and smoother operation, reducing lifting cycle time by over 18% and energy consumption by 35%.
Quick Takeaway
By integrating a comprehensive automation suite—including a PLC, Hybrid HMI, and P2 VFD—a standard Vertical Reciprocating Conveyor (VRC) was transformed into a safer, faster, and more reliable material handling lift for moving pallets, boxes, and totes between factory floor levels.
The Challenge: Safety Risks and Inconsistent Positioning
The customer was utilizing a VRC to transport goods across multiple levels in their warehouse facility. However, they faced severe safety risks due to the complete absence of automatic safety interlocks. Furthermore, the manual system suffered from inconsistent operation, frequently causing the heavy platform to stop at incorrect floor levels and disrupt the material handling workflow.
The Solution: Complete PLC and VFD Automation
To address the safety and positioning issues, a complete automation upgrade was implemented:
PLC Integration: A Programmable Logic Controller (PLC) was installed to fully automate the lifting, lowering, and stopping operations, seamlessly integrating all safety sensors and a robust safety interlock system.
VFD Precision: A P2 Variable Frequency Drive (VFD) was utilized to manage the carriage's vertical moments. By controlling the motor brake directly through the VFD, the system achieved highly precise position control at every single floor.
Hybrid HMI Control: A Hybrid Human-Machine Interface (HMI) was supplied to oversee the entire VRC lift process. This interface provides operators with real-time visibility of actual moments, platform position, active alarms, and all input/output equipment statuses.
Business Impact and Results
Increased Speed: Total lifting cycle time was reduced by over 18%.
Energy Savings: Overall energy consumption was drastically reduced by 35%.
Smoother Operation: Successfully achieved a smooth ramp start by utilizing the new VFD.
Enhanced Safety: The automation upgrade made the entire material handling process significantly safer, highly reliable, and much easier to operate.