Product Description:

The VT-HNC100-3-31/E-I-00/000 is a digital axis controller manufactured by Bosch Rexroth Indramat for the VT-HNC Digital Axis Controllers series within the Digital NC Control HNC100 product line. It supervises motion on hydraulic machinery by processing network commands and generating valve control signals, allowing coordinated positioning and velocity control over EtherNet/IP. The unit installs inside control cabinets and interfaces directly with external drives and feedback devices used to automate presses, test rigs, and molding equipment.

Fast cyclic communication is a design priority, and the controller can complete each control loop in as little as 2 ms. It exchanges up to 992 bytes of cyclic I/O data with the PLC during every scan. The capacity in each direction is 496 bytes, helping prevent buffer overruns when large parameter sets are transferred. Network traffic travels over a switched Ethernet backbone operating at 100 Mbit/s. The internal forwarding path adds a minimum pass-through delay of only 0.9 µs, supporting responsive control across distributed machines.

This version supports the control of 3 hydraulic axes and provides up to 20 digital outputs for valve enable lines or status relays. The integrated switch has 3 RJ-45 ports, simplifying line or star network wiring. It operates in full-duplex mode to transmit and receive data simultaneously without collisions. The device operates without a bus connection card and relies on its EtherNet/IP adapter role for network communication. DHCP can assign the controller’s IP address automatically, reducing the need for manual network configuration. Connection Classes 1 and 3 are supported, while unconnected explicit messaging reduces communication overhead. Incremental and SSI encoders can provide position feedback, but the controller does not include an interface for inductive position sensors. The maximum pass-through delay is 1.4 µs, and the electronics are part of component series 3.