Watlow PPC-2000 - Manual (Page 315)

PPC-2000 User’s Guide Glossary
Doc.# 30002-00 Rev 2.3 Watlow Anafaze 287
Flags
A program variable with a value of either 1 or 0.
Frequency
The number of cycles over a specified period of
time, usually measured in cycles per second. Also
referred to as Hertz (Hz). The reciprocal is called
the period.
G
Gain
The amount of amplification used in an electrical
circuit. Gain can also refer to the Proportional (P)
mode of PID.
Global Alarm
Alarm associated with a global digital output that
is cleared directly from a controller or through a
user interface.
H
Heat
A control method and association of parameters
organized around maintaining temperature above
ambient.
Hertz(Hz)
Frequency, measured in cycles per second.
High Deviation Alarm
Warns that the process is above setpoint, but
below the high process variable. It can be used as
either an alarm or control function.
High Isolation
System used on some PPC-2000 analog input
modules to protect electronic components from
high voltage faults.
High Process Alarm
A signal that is tied to a set maximum value that
can be used as either an alarm or control function.
I
Input
Process variable information that is supplied to
the instrument.
Input Scaling
The ability to scale input readings (readings in
percent of full scale) to the engineering units of
the process variable.
Input Type
The signal type that is connected to an input, such
as thermocouple, RTD, linear or process.
Integer
A variable with a potential range of –32,768 to
32,767.
Integral Control (I)
Control action that automatically eliminates off-
set, or droop, between setpoint and actual process
temperature.
J
Jumper
A removeable connector that acts as a switch
between a set of pins on a circuit board used to
configure electronic hardware.
L
Linear Input
A process input that represents a straight line
function.
Low Deviation Alarm
Warns that the process is below the setpoint, but
above the low process variable. It can be used as
either an alarm or control function.
Low Process Alarm
A signal that is tied to a set minimum value that
can be used as either an alarm or control function.