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Glossary

Original Ć June 1990 CE4.2:CL6211

PROVOX Trademark for Fisher Controls' product line of advanced process control

equipment: distributed microprocessorĆbased control and data

acquisition devices that communicate with operator consoles over a data

highway.

PROVUE Trademark for Fisher Controls' line of console products that use a global

database configuration and have highĆresolution graphics, ergonomically

designed keyboards, and color printers.

Pseudo Function Sequence Table (PFST)

The established set of function blocks within a configurable controller or

a UOC/IFC Loop point. Each of these function blocks, within the fixed

sequence, can be enabled or disabled to yield a variety of control effects.

Pulse Count Input (PCI)

A PROVOX point type. A PCI point either reads a series of electronic

pulses or switch closures or receives a 16Ćbit unsigned integer in the

range 0Ć65535. An alternate name for PCI point is integer point.

PV Acronym: Process Variable

RAM Acronym: RandomĆAccess Memory

RandomĆAccess Memory (RAM)

A type of semiconductor memory. A user can read from and write to a

RAM as often as desired.

Rate Another name for derivative control action.

Ratio An operatorĆchangeable proportion that a controller maintains between

the values of two variables, as part of a control strategy.

ReadĆOnly Memory (ROM)

A semiconductor memory device in which information is stored

permanently. A user can examine ROM contents as often as desired but

cannot change the contents.

Reference Register

A type of register used in an FST or a calculation. A reference register

can be written into or read by other PROVOX system devices, but the

device containing the register can only read its value.

PROVOX Ć Re

1 2 ... 300 301 302 303 304 305 306 307 308 309 310 ... 319 320

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Response Electronics CL6011B Especificações Página 305