Plastics Products: HNC100-3X Controller Compact, modular and fieldbus-ready drive offers closed-loop control, sequence programming, and communication flexibility The HNC100-3X digital servo drive is a freely programmable, bus-capable NC control for electromechanical and electrohydraulic drives. It expands the range of tailored automated solutions of the HNC100 family by offering control of up to four electrohydraulic axes in one unit. The HNC100-3X offers enhanced modularity and flexibility with a more compact equipment architecture that makes installation easier and saves valuable control cabinet space. Rexroth has coupled this reduced size with improved performance; the HNC100-3X features increased computing power to handle more complex tasks. The result: reduced costs by squeezing more performance out of this compact, powerful unit. The HNC100 offers true axis synchronization. Open- and closed-loop control algorithms specifically tailored to the special characteristics of hydraulics make it easy to achieve optimum performance of electrohydraulic drives. In addition, the increased computing power of the HNC100-3X shortens scan rates. Up to eleven freely configurable digital I/Os increase automation flexibility. And migration from earlier HNC platforms is a snap: previous HNC programs can be installed in the HNC100-3X, conserving valuable existing program loops. The customer can program the sequence via a PC using the HNC’s WIN-PED software. The NC programming provides greater flexibility of the HNC, and it can complement existing user know-how with its common platform. As a standard, each HNC100 features a local CAN-bus, which can be used to link the individual drives for general data exchange or for implementing synchronization controls, resulting in a scalable automation concept using modular principles. Like previous generations of HNC100 controls, the HNC100-3X can communicate with higher-level controls via Profibus-DP, INTERBUS-S, INTERBUS-S with fiber optic cable, and CANopen fieldbuses. The HNC100 is also available with SERCOS interface, the most common communication system for electrical drives. This common bus architecture supports the Bosch Rexroth IndraMotion concept of finely scalable and interpolated electrical and hydraulic drive control structures, making total machine control and programming faster, easier, and more completely integrated than ever before. The HNC100 family of controls offers the following electrohydraulic control loop options: Closed-loop position control: PDT1 controller Linear gain characteristic curve Direction-dependent gain Inflected gain characteristic curve (linearization of valve curves) Gain can be changed via the NC program Fine positioning (switching integrator) Residual voltage principle/overlap jump Compensation of valve offset State feedback (Acceleration/pressure) Command value feedforward Limitation of control value via the NC program Position-dependent braking Open-loop controlled startup, closed-loop controlled braking (linear, root-shaped, or sinusoidal characteristics) The same parameters used for the position controller are also used for closed-loop controlled braking Closed-loop velocity control PI controller Closed-loop pressure/force control: PIDT1 controller Differential pressure evaluation for closed-loop force control Pressure limitation Position monitoring Alternating closed-loop control: Closed-loop position control Closed-loop pressure control Synchronization control 2-axis synchronization for each HNC100 Master-slave principle