Rockwell Automation 1440-PK02-05M2 XM-720 Machine Monitor - Manual (Page 61)

Publication GMSI10-UM001C-EN-E - June 2011
Glossary 61
For non-failsafe operation, the following are true:
• Under nonalarm conditions, the relay closes the circuit between the
common and the N.C. (normally closed) terminals.
• Under alarm conditions, the relay changes state to close the circuit
between the common and the N.O. (normally open) terminals.
NVS (Non-Volatile Storage)
NVS is the permanent memory of an XM module. Modules store parameters
and other information in NVS so that they are not lost when the module loses
power (unless Auto Save is disabled). NVS is sometimes called “EEPROM.”
online help
Online help allows you to get help for your program on the computer screen
by pressing F1. The help that appears in the Help window is context sensitive,
which means that the help is related to what you are currently doing in the
program.
orders
Multiples of the operating speed of a piece of equipment. The first order is the
operating speed. The second order is two times the operating speed, and so
on.
Program mode
The XM module is idle. Typically this occurs when the module configuration
settings are being updated with the XM Configuration program. In Program
mode, the signal processing/measurement process is stopped. The status of
the alarms is set to the disarm state to prevent a false alert or danger status.
Run mode
In Run mode, the module collects measurement data and monitors each
measurement device.
settling time
The amount of time it takes a measurement to reach 90% of the final value
given a step change in the input signal.
signal detection
Defines the method of conditioning or measuring a dynamic input signal. Peak
(0 to the peak voltage), Peak-Peak (minimum peak to maximum peak), and
RMS (square root of the mean of the square of the values) are the most
common methods of signal detection.