PC58 Intelligent Motion Controller for PC

The PC58 brings the Oregon Micro Systems, Inc. (OMS) intelligent motion control technology to servo applications as well as stepping motors.  This new generation of motion control products provides up to 8 axes of motion control to ISA or EISA bus compatible computers.  Outputs are provided for 12 bit analog or PWM servo output as well as step and direction for stepper applications.  A PID filter is provided with user adjustable parameters for ease in tuning for optimum system stability.  Limit and home switch inputs are provided for all axes as well as user definable I/O for synchronization and control of other events.  Incremental encoder feedback is used for all servo axes and is available on stepper axes on some models.  This is used for position feedback and may also be used for slip or stall detection.  Electronic gearing is also available for tracking with another motor or manual input device.
The bus interface uses dual port RAM technology for communication of commands from the host and feedback of motion control parameters.  Commands may be written to this RAM by the host, eliminating the communication bottlenecks of I/O port based communications.  Critical motion parameters such as position and velocity are available in the dual port RAM allowing the host to interrogate these parameters in real time while the motion is in progress.  This RAM may be mapped to any desired memory location within the computer memory space by writing the base address to an I/O register.
Interrupt control and other data is available through a block of eight I/O registers.  These registers include interrupt control and status, limit and home switch status, done flag status and slip status for each axis as well as the user definable I/O.  Some commands may be passed to the PC58, bypassing the communication channel.  These commands cause an immediate interrupt and may be used for critical commands such as abort.  Each axis may perform individual unrelated moves or they can be coordinated as required by the application.
Simple ASCII commands may be easily sent to the board from any high level language.  Complex move sequences, time delays and control of other external events may be programmed through the PC58 interface.
The IO58 companion module for the PC58 provides an efficient means of connecting the PC58 signals to external devices.  It includes a 100 conductor shielded cable and individual connectors that separate each axis and the I/O signals of the PC58.

Controller capabilities

• Up to 8 axes of Servo or Stepper control
• Consumes a single ISA I/O slot

Communications

• ISA - (IEEE996)
• Dual-Port RAM interface for high speed communications
• Motion parameters available in DP RAM for near real time profile status
• Electronic “mail box” in DP RAM for priority commands, i.e. abort
• 8 I/O registers for control and status
• Interrupt or Polling communication

Sophisticated Control Functionality

• 12 bit DAC analog resolution
• Independent and coordinated motion of all axes at the same time
• Slip & Stall detection with encoder feedback
• Crystal controlled step pulse from 0 to 1,044,000 steps per second
• Configurable PID filter with feedforward coefficients
• Circular Interpolation
• Constant velocity linear interpolation (all axes)
• Electronic Gearing

32 bit processor for extensive co-processing

• Does not burden the host with overhead
• Parabolic, “S”-curve & Linear trajectory profiles
• Patented technology to minimized torque ripple and velocity modulation
• Internal Watchdog timer for safety

Control signals

• 100 pin shielded high density connector
• 40 dedicated I/O
• 20 “user definable” I/O
• Output is +/-10V, PWM or Step & Direction
• Independent home and plus / minus over-travel inputs

OMS-EZ™ Software programming

• High level programming expertise not required
• Over 150 commands, “universal” to all OMS controllers
• Commands are ASCII characters
• Automatic conversion to “user” defined units i.e. inches / revolutions
• Software for DOS, Win 3.1, 95, NT, etc.
• Software supplied at no additional cost
• Compatible with most operating systems

Flash Memory

• Field upgradable firmware
• Factory Direct Technical Support
• Person to person toll-free tech support, call
• 800-707-8111
• Application notes available
• Example programs and application code provided
• Firmware upgrades and enhancements can be implemented in the field

PDF Documents