K-WANG
GE VMIVME-2540 24-Channel Intelligent Counter/Controller
GE VMIVME-2540 24-Channel Intelligent Counter/Controller
PRODUCT OVERVIEW
The VMIVME-2540 Intelligent Counter/Controller (ICC) is a VMEbus slave I/O module designed to provide high-precision digital measurement and function generation capability for VMEbus systems with a simple, consistent memory-mapped user interface. The following functions are supported by the VMIVME-2540:
·Measurement Functions
Event counting
Frequency measurement
Period/pulse-width measurement
Quadrature position measurement
·Generation Functions
Pulse train/square wave generation
Timer/periodic interrupt generation
Frequency division
Quadrature position control
APPLICATIONS
• Rotational shaft instrumentation: angular position, velocity, acceleration
• Automotive industry testing: brakes, transmissions, tachometer
• Robotics
• Telescope/observatory
• Medical/laboratory instruments
• Linear position measurement: distance, velocity, acceleration
• Elevators
• Overhead cranes
SPECIFICATION
• Event counting - up to 4 giga events
• Frequency measurement —1.16 x 10-3 Hz to 2.5 MHz
• Period/pulse-width measurement—400 ns to 8.5899 x 106 s (32-bit floating point), 400 ns to 858 s (32-bit unsigned integer)
• Square wave/pulse train generation - 0.0076 Hz to 2.5 MHz
• Timer/periodic VMEbus interrupter - 0.0076 to 1,000 Hz
• Quadrature position measurement - sin/cos up to 1 MHz, 32-bit counters, limit/modulo checking
• Integer period/pulse-width measurement 16- and 32-bit, discrete or continuous; low data transport lags
• Programmed output - up to 24 discrete outputs
• Pulse sequence mode - train of N pulses with programmable duty cycle
• Quadrature position control outputs - ±1/4 wave control resolution; up to 1.25 MHz step rate and ±32767 steps per command
• Integer QPM group acquisition - captures two integer QPM measurements simultaneously
• Event-triggered timer delay - generates VMEbus interrupt up to 131.1 seconds after event edge input; retriggerable
• 24 control/measurement interfaces: 24 clocks, 24 gates, 24 outputs
• RS-422 differential interface with support for single-ended TTL inputs
• Options allow configurations of 4, 8, 16, and 24 interfaces
• On-board 15 MHz 68HC000 CPU
• A32/A24/D32/D16/D8 (EO) VME slave interface, 64 Kbyte VMEbus memory window
• Data exchange interface: ANSI/IEEE standard 754-1985 for 32-bit floating-point arithmetic
• Continuous measurement modes • VMEbus compatible ANSI/IEEE 1014-1987 IEC 821 and 297
• X-Y tables
• Machine tools
• Automatic storage retrieval
Input Frequency Range/Accuracy
16-bit Counter: 0.0076 Hz to 2.5 MHz
0.007 to 76 Hz Accuracy: 0.015 percent maximum
76 Hz to 2.5 MHz Accuracy: Percent Error = 100* (Frequency/5 MHz)
16-bit Enhanced-Resolution Counter: 0.001 Hz to 1.25 MHz Requires two 16-bit counters
16-bit Prescaler Range: ÷2-65536 with 2.5 MHz maximum clock rate
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