Addi-Data APCI-2032 Technical Description page 65

APCI-1032, APCI-1564 and APCI-2032
Parameter
PCI bus
PLD
Protective circuitry
Reference voltage
Resolution
Sensor
Settling time
Short circuit
Short circuit current
Signal delay
Synchronous
Throughput rate
Timer
Diagnostic program
The parameters of a control comprise all fort he control process
required numeric values, e.g. for limit values and technological
number.
PCI bus is a fast local bus with a clock rate up to 33 MHz. This bus
is used for processing a great number of data. The PCI bus is not
limited like the ISA and EISA systems.
= Programmable Logic Device
Prorammable logic circuitry
A protective circuitry of the active part is done in order to protect the
control electronic. The simplest protective circuitry is the parallel
switching of a resistance.
Reference voltages are stable voltages that are used as reference unit.
From them voltages can be derived that are required for example in
current supplies and in other electronic circuitries.
The smallest significant number to which a measurement can be
determined. For example a converter with 12-bit resolution can
resolve 1 part in 4096.
A device that responds to physical stimuli (heat, light, sound,
pressure, motion, etc.) and produces a corresponding electrical
output.
The time required, after application of a step input signal, for the
output voltage to settle and remain within a specified error band
around the final value. The settling time of a system includes that of
all of the components of the system.
A short circuit of two clamps of an electric switch is when the
concerning clamp voltage is zero.
Short circuit current is the current between tow short-circuited
clamps.
The change of a signal affects the following circuitries with finite
velocity; the signal will be delayed. Besides the signal delay times
that are not wanted, the signal delay can be extended by time
switches and delay lines.
In hardware, it is an event that occurs in a fixed time relationship to
another event. In software, it refers to a function that begins an
operation and returns to the calling program only when the operation
is complete.
The maximum repetitive rate at which data conversion system can
operate with a specified accuracy. It is determined by summing the
various times required for each part of the system and then by taking
the inverse of this time.
The timer allows the adaptation of program processes between
processor and peripheral devices. It usually contains from each other
independent counters and can be programmed for several operation
types over a control word register.
A utility program used to isolate hardware malfunctions on-board, or
software malfunctions in the program.
Glossary
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