500-004941-000
1-1
SECTION 1
INTRODUCTION
1.1
INTRODUCTION
The VMIVME-4941 is a VMEbus compatible Quad Channel Resolver-to-
Digital Converter Board. Its features include:
a. Quad R/D converters
b. Tracking rates up to 800 rps minimum (48,000 RPM)
c. Software programmable resolution (10-, 12-, 14- or 16-bit)
d. Software programmable bandwidth (530 Hz, 130 Hz)
e. 16 bit pitch counter per channel
f.
8, 16, or 32 bit data transfers
g. Reference frequency from 360 Hz (Lo Bandwidth) to 6 k Hz
h. Status indications for loss of signal and tracking error over 65 bits
i.
Accuracy to ±2.3 ARC minutes available (optional)
j.
Double Eurocard form factor
k. Built-in-test capability with loss of signal and level of error fail LEDs
1.2
FUNCTIONAL DESCRIPTION
The Quad Channel Resolver-to-Digital Converter Board consists of
VMEbus compatibility logic, four resolver-to-digital converters, four 16-bit pitch
counters, and logic to support fault isolation to the channel level using a resolver
test signal that must be supplied via the P2 backplane user I/O pins.
VMEbus compatibility logic controls data transfers to the on-board
registers allowing 8-, 16-, or 32-bit transfers. The compatibility logic also contains
address decoding enabling the board to be addressed within the short I/O address
space.
Four independent R/D converters provide the user with the capability to
convert four resolver input channels. The R/D converters feature programmable
resolution and bandwidth. The resolution selection provides the user with the
capability of programming 10, 12, 14, or 16 bits.
The resolver board is designed for use in modern, high performance
commercial and industrial control systems applications including motor control,
radar, antenna position information, CNC machine tooling, robot axis control, and
process control.
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