The VT-HACD Digital Axis Controllers series is a rail-mounted digital control electronics platform for hydraulic axes that can run PIDT1-based control loops with optional state feedback and can also be used as command-value electronics to generate, link, and standardize signals.
It supports digital position feedback from SSI or incremental measurement systems (and can combine this with analog sensors), while providing six software-configurable analog inputs (voltage or current), three analog outputs (including one switchable voltage/current channel), and digital I/O with a dedicated enable input and OK status output. Applications are built in a structural editor using up to 32 configurable blocks that store command values, ramp times, motion rates, and controller parameters, with block execution triggered by digital inputs, signal thresholds, or timers. For hydraulic-specific behavior, it includes signal-linking functions (math operations, limiters, filters) and output-side compensation features such as direction-dependent gain, valve characteristic-curve correction, overlap jump/residual velocity logic, and zero-point (offset) correction. Commissioning and diagnostics are handled through the BODAC PC software over an RS-232 connection, with options for networking and higher-level control via fieldbus interfaces, all powered from a standard 18–30 VDC supply.
