Download User`s Manual for Installation and Configuration

Appendices
Appendix 3
Abbreviations and Terms
Abbreviations are used in descriptions, tables, and illustrations of this manual. The following describes major abbreviations.
AT:
Auto Tuning. The PID is automatically adjusted at an optimal numeric value.
DI:
Digital input
DISP:
Display. Pressing the [display] key will change the contents of the display.
DO:
Digital output (control output of relay and voltage pulse, and event output)
OL:
Output Low. Output low limit, a minimum limit level of the output, is set.
OH:
Output High. Output high limit, a maximum limit level of the output, is set.
PARA:
Parameter. A variable to determine the operating conditions for this unit. A desired numeric
value is set.
PID :
PID has the following meanings.
P (Proportioning). Proportional operation.
I (Integral). Integral operation or reset operation.
D (Derivative). Derivative operation or rate operation.
PV:
Process Variable. Measured values of the thermocouple, RTD, and linear input.
SP:
Set value of Set Point. For example, set point to control the temperature.
LSP :
Local Set Point. A set value stored in the controller.
RSP:
Remote Set Point. A set value given from the outside by the analog signal.
MV:
Manipulated Variable. An output of the instrument to be controlled. This output shows the PID
control results.
LMV:
Local Manipulated Variable. When the loop type is set at computer backup, MV of the PID
control result of this unit is called "LMV". "LMV" is distinguished from "RMV", an MV given
from the outside.
RMV:
Remote Manipulated Variable. MV given from the outside by the analog signal.
Setup:
Setup is a setting operation corresponding to how to use a unit that incorporates operating conditions, such as control action.
Hysteresis:
An operation gap during event operation. A difference between the value at which the event
OFF is changed to ON and the value at which the event ON is changed to OFF.
Hysteresis is shown as "(HYSR" in the Figs. in this manual.
EV:
Event. EV shows a set value of the event function. The event function is the ON/OFF signal
function, which is output in the control status.
EV with numeric values added, like EV1 or EV2 shows an event function. A numeric value
shows relevant event No.
App.-16