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Delta Tau: PMAC Mini PCI
The PMAC Mini PCI is a compact, 2-axis version of the PMAC(1) family (unless accessories are added to expand the number of axes). It can be used in a PC’s PCI slot as a half-sized board (230 mm, 9” long) or it can be used standalone using serial communications for setup and/or application control. Programs for the PMAC Mini PCI (both motion and PLC programs) are 100% compatible with other versions of Non-Turbo PMAC. The PC can communicate to PMAC through the PCI slot or through a RS-232 or RS-422 serial port if standalone operation (i.e. without a PC) is desired.
Hardware Features
40 MHz DSP563xx CPU (Option 5AF)
128k x 24 internal zero-wait-state SRAM
512k x 8 flash memory for firmware and user backup
Latest released firmware version
RS-232 serial interface, 33 MHz PCI bus interface
2 channels axis interface circuitry, each including:
16-bit +/-10V analog output
3-channel (AB quad with index) differential/single-ended
Encoder inputs 4 input flags, 2 output flags
Interface to 4 external 16-bit serial ADCs
2 additional 3-channel (AB quad with index) differential/single ended encoder input
Display, muxed I/O, direct I/O interface ports
Buffered expansion port
Clock crystal with +/-100 ppm accuracy
PID/notch/feedforward servo algorithms
1-year warranty from date of shipment
One CD-ROM per set of 1 to 4 PMACs in shipment (Cables, mounting plates, mating connectors not included)
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
Interactive jog moves
Optional 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
Optional 35-term “pole-placement” servo filter
Compensation Features
Position compensation tables (1D & 2D)
Torque compensation tables
Backlash compensation
Tool radius compensation
Safety Features
Hardware and software overtravel 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
Feedback sensor types that can be processed
Digital quadrature encoders
Sinusoidal encoders, interferometers
Resolvers
Potentiometers
LVDTs, RVDTs
Parallel-format encoders, interferometers
MLDTs
Serial absolute encoders (e.g. SSI)
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)
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
Communication Options
OPT-2 - On-board 8Kx16 Dual Ported RAM
Processor and Firmware Options
OPT-10 - Firmware version specification
OPT-5AF - Default CPU configuration: 40 MHz
OPT-5CF - 80 MHz DSP563xx CPU
OPT-5EF - 160 MHz DSP563xx CPU (320 MHz 56002 equivalent)
OPT-6 - Extended-servo-algorithm firmware
OPT-6L - Multi-block look ahead firmware
Baseboard Options
OPT-15 - 2 channel V-to-F converters for analog input
OPT-8A - High-accuracy clock crystal (+/-25ppm)