Highlights 

The motion processor is driven by a host microprocessor via an 8-bit or 16-bit bus interface or through an asynchronous bi-directional serial port, giving users the ability to offload resource intensive motion control functions from the application’s host. The MC2500 Series offers high speed, programmable pulse and direction output at up to 5 M-pulses/sec. The motion processor operates in an open loop mode where the pulse generator is driven from output of the trajectory generator. Optional encoder feedback provides on-the-fly motor stall detection and allows the chipset to detect when the stepping motor has lost steps during a motion. Trace capabilities provide on-the-fly data storage for analyzing system performance and performing maintenance and diagnostics. With over 110 commands, PMD’s instruction set offers flexibility and versatility.

Instructions are used to initialize and control the motion processor. User selectable profiling modes supported by the motion processor include S-curve, trapezoidal, velocity contouring and electronic gearing. The MC25xx accepts input parameters such as position, velocity and acceleration from the host and generates a corresponding trajectory. The motion processor accepts feedback from an incremental encoder, up to 5 megacounts per second, or from an absolute encoder or resolver, up to 160 megacounts per second, to read the current axis position. Multiple breakpoints per axis offer precise sequencing and control of events by the application program. PLC-style instructions are provided, which operate on inputs and set outputs. The instructions use Event, Activity and Signal registers. Input signals include two limit switches (one for each direction of travel), home indicator, and a general-purpose programmable input per axis. One general-purpose programmable output signal is also provided per axis. Eight general-purpose analog (0-5 V) and 256 (16-bit wide) general-purpose discrete inputs/outputs are available.

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