Motion control card Diva Automation

Specifications for C300TM Controller

The C-300TM Motion Controller provides up to three completely independent motor controllers on a half-size ISA-bus card. In addition to the motion control functions, 8 digital inputs and 5 digital outputs are provided for control and sensing functions.

Each axis has provision for two limit switches and a reference switch, in addition to a differential quadrature encoder input with index capabilities. For highest precision in a homing application, motion is commanded until the reference switch is encountered, then continues at a slower rate until the encoder index is found. With this procedure, the home position may be repeated to an accuracy of one encoder count, or the ultimate accuracy of the system.

All limit and reference switch inputs are sensed through line receivers with 1 volt of hysteresis for noise rejection. The encoder inputs use differential line receivers with 300 mv of hysteresis. They may be used with single encoders, as well.

A capture/compare circuit is used to sense any change in the state of the limit and reference switches. When any one of them changes, a maskable interrupt is generated. There are several additional sources of interrupt, including excessive error, encoder error index, and absolute and relative position breakpoints.

There are four ISA-bus interrupt lines which may be used for the C-300TM controller. Interrupts 10, 22, 12 and 15 may be used. Alternatively, all interrupts may be disabled and the state of the interrupt may be polled from the host processor.

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