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Delta Tau: PMAC PCI
The PMAC PCI is a member of the PMAC family of boards optimized for interface to traditional servo drives that use single analog inputs representing velocity or torque commands. It is capable of eight axes of control. It can have four to eight channels of on-board axis interface circuitry. The PMAC-PCI is a full-sized PCI-bus expansion card, with a small piggyback board containing the CPU board. While the PMAC-PCI is capable of PCI bus communications, with or without the optional dual-ported RAM, it does not need to be inserted into a PCI expansion slot. 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
128k x 24 0-wait-state flash-backed SRAM
512k x 8 flash memory for firmware and user backup
2k x 8 EEPROM memory for setup variable backup
Latest released firmware version
RS-232/422 serial interface, PCI (PC) bus interface
Four channels axis interface circuitry, each including:
16-bit +/-10V analog output
3-channel differential/single-ended encoder input
Four input flags, two output flags
Interface to external 16-bit serial ADC
Display, control panel, 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
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 âpole-placementâ servo filter
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 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 movement
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-1 - 4 additional channels on board axis interface circuitry
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 DSP563xx CPU
OPT-5CF - 80 MHz DSP563xx CPU
OPT-5EF - 160 MHz DSP563xx CPU
OPT-6 - Extended-servo-algorithm firmware
OPT-6L - Multi-block look ahead firmware
Baseboard Options
OPT-12 - 8 Channel on-board 12-bit A/D converter
OPT-12A - Additional 8-channel on-board 12-bit A/D converter (requires Opt12)
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)