Rockwell Automation 1771-TCM TEMPERATURE CONTROL - Manual (Page 7)

Using this Manual P–2
Publication 1771Ć6.4.5 Ċ January 1997
For a complete listing of Allen–Bradley terminology, refer to the
Allen-Bradley Industrial Automation Glossary (publication AG-7.1).
In this manual, we refer to:
•
the Temperature Control module as the “1771-TCM module,” the
“TCM module,” or as the “module”
•
the Temperature Control Module Configuration Software as
“configuration software” or “software”
•
the programmable controller processor, as the “PLC processor” or
the “processor”
•
a thermocouple as a “TC”
•
a time-proportioned output as a “TPO”
•
a temperature control PID loop as a “temperature control loop,” a
“PID loop,” or a “loop”
In addition, some terminology has been adjusted to conform to
ISA/IEEE standard definitions. The table below shows the
commonly-used Allen-Bradley terms that you may already be
accustomed to, the corresponding ISA/IEEE terms, and the
definitions for these words.
Existing AĆB Term ISA/IEEE Term Definition
Control Variable (V or CV) or
Controller Output (CO)
Manipulated Variable (M) A quantity or condition which the controller applies to the controlled system
Process Variable (PV) Controlled Variable (C) In a control loop, the quantity or condition of the controlled system which is
directly measured and controlled
Process Variable (PV) Any variable of the process, including the manipulated variable and the
controlled variable
Proportional Gain (K
p
) Controller Gain (K
c
) The overall gain for the loop with dependent PID control action; this affects the
integral and derivative terms as well as the proportional term
For a list of publications with information on Allen-Bradley
programmable controller products, consult our Publication Index
(publication SD499).
For information on how to install the module or how to generate the
necessary ladder-logic programming for operating the module with
this configuration software, refer to the Temperature Control Module
User Manual, publication 1771-6.5.120.
Terms and Abbreviations
Related Publications