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Delta Tau: Turbo PMAC VME
The Turbo PMAC VME offers high performance control capabilities to the robust and highly expandable VME bus format. Providing up to 32 axes of control in velocity or torque mode.
Hardware Features
80 MHz DSP56303 CPU (120 MHz PMAC equivalent) (fast internal memory for 1st 15 axes servo & commutation)
128k x 24 SRAM compiled/assembled program memory (5C0) (for firmware, compiled PLCs, user-written servo & phase)
128k x 24 SRAM user buffer memory (5C0) (for motion & uncompiled PLC progs, variables, tables, buffers)
1M x 8 flash memory for user backup & firmware (5C0)
Latest released firmware version
RS-422 serial interface, VME bus interface
4 channels axis interface circuitry, each including:
16-bit +/-10V analog output
3-channel A, B, C, Quad per Axis differential/single-ended encoder input
4 input flags, 2 output flags
Interface to external 16-bit serial ADC
Display, control panel, muxed I/O, direct I/O interface ports
PID/notch/feedforward servo algorithms
Extended "pole-placement" servo algorithms
1-year warranty from date of shipment
Software Features
Trajectory Generation Features
Linear interpolation mode with S-curve accel/decel
Circular interpolation mode with S-curve accel/decel
Rapid point-to-point move mode
Cubic B-spline interpolation mode
Cubic Hermite-spline (PVT) interpolation mode
Automatic move-until-trigger functions with hardware capture
Altered destination on the fly
Interactive jog moves
Multi-move look ahead for velocity and acceleration limiting
Servo Features
Standard digital PID feedback filter
Velocity, acceleration, and friction feedforward
2nd-order notch/low-pass filter
Gains changeable at any time
Programmable input, integrator, and output limits
Alternate 35-term âpole-placementâ servo filter
Alternate user-written high-level âOpen Servoâ algorithms
Commutation Features
Sinusoidal commutation of AC servo motors
Vector control of AC induction motors
Digital current-loop closure with direct PWM output (PMAC2)
Compensation Features
Position compensation tables (1D & 2D)
Torque compensation tables
Backlash compensation
Tool radius compensation
Safety Features
Hardware and software over travel limits
Amplifier enable/fault handshaking
Following error limits
Integrated current limit
Encoder loss detection (some versions)
Watchdog timer
Program and communications checksums
Computational Features
Real-time multi-tasking operating system
48-bit floating-point math for user programs
Trigonometric and transcendental functions
Automatic type-matching of different variable types
User-defined pointer variables to any registers
Coordination and Master/Slave Features
User-defined coordinate systems for automatic coordination of axes
Separate coordinate systems for independent motion of axes
Multi-motor axis support (e.g. gantries)
Dynamic axis transformations (e.g. offsets, rotations, mirroring)
User-written forward and inverse-kinematic algorithms for non-Cartesian geometries
Electronic gearing (no programming required)
Electronic cams with programmable profiles
Motion Program Features
High-level programming language
Automatic sequenced execution of moves
Calculations and I/O synchronous to motion
Axes programmed in user engineering units
Motion values as constants or expressions
Automatic coordination of multiple axes
Ability to execute G-code programs
PLC Program Features
Execution asynchronous to programmed motion
I/O control as in hardware PLC
Executive functions for standalone applications
Safety and status monitoring
Servo gain scheduling
Data reporting functions
Access to all registers in controller
Additional Axes
OPT-1V - 4 additional channels axis interface circuitry
OPT-7V - Plate mounting for standalone applications
Communication Options
OPT-2V - On-board 8Kx16 Dual Ported RAM
Processor and Firmware Options
OPT-10 - Firmware version specification
OPT-5AF - 40 MHz CPU
OPT-5CF - 80 MHz CPU
OPT-5CL - 80 MHz DSP56303 CPU (8Kx24 internal memory)
OPT-5EF - 160 MHz DSP563xx CPU
Baseboard Options
OPT-0 - Removal of VME interface (for standalone applications)
OPT-14 - Replacement of flag opto isolators with socketed shunts
OPT-15 - V-to-F Converter to use Control Port Analog Input
OPT-16 - 16K x 24 battery-backed parameter RAM
OPT-8A - High-accuracy clock crystal (+/-15ppm)
Connector Options
OPT-3V - Extended VME front plate for additional 5 connectors
Additional Options
OPT-3VG - Enclosed plastic PLC style front plate