Journeyman electrician with manufacturing controls background Keywords: Allen Bradley, Siemens, Ethernet, VFD (variable frequency drives), PLC (programmable logic controller), TCP, distribution centers, fulfillment centers, bottling plants, MDR (motor driven motors), SEW, Configure, firmware . The Controls Technician shall be able to troubleshoot control systems, read and interpret electrical schematics and technical documentation, and understand the operation and configuration of PLCs, VFDs, sensors, controllers, communication networks, and related components.