
Original — December 1991
UM4.6:CS6003
Glossary-10
Discrete Having either of two states, for example, on or off, or 1 or 0.
Discrete Control Device (DCD)
A PROVOX point type. A DCD point combines as many as 8 discrete
output and 16 discrete input channels into a single point. A DCD point
uses a DCD template which contains up to 16 setpoints for driving
outputs and matching input/output states. A common use for a DCD
point is to control a discrete device that provides feedback about its
status, such as a solenoid valve with limit switches.
Discrete Input (DI)
A PROVOX point type. A DI point monitors a single discrete value of the
process variable. That is, a DI point reads discrete data from a sensor or
other system device.
Discrete Input/Output (DIO)
The reception and transmission of discrete signals. In PROVOX
systems, DIO usually refers to a discrete input/output card in a controller.
Discrete Output (DO)
A PROVOX point type. A DO point generates a single discrete value
referenced by the setpoint.
DMA Acronym: Direct Memory Access
DO Acronym: Discrete Output
Download To transfer configuration instructions and reference information from a
configuration device to other devices of a process control system.
DSP 1. Abbreviation: Display
2. Acronym: Distributed Systems Products
3. Acronym: Digital Signal Processing
DSR Acronym: Direct Screen Reference
Dual Channel Port Controller (DCPC)
A device that controls direct memory access within the Hewlett Packard
computer family.
Dual In-line Package (DIP)
An integrated circuit packaging method that allows for two rows of
conductors spaced at least 0.3 inch (7.6 mm) apart with each conductor
in the row spaced on 0.1-inch (2.5 mm) centers.
DVM Acronym: Digital Volt Meter
DW Acronym: Display Write-RAM (for PCON)
Dis - DW
Glossary
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