Appendix A Glossary - Omron 3G3AX-MX2-PRT-E User Manual

Device Profile
DP-V1
DP-V1 Class 2
EMC
EMI
FA Systems
Fieldbus
Free-run Stop
Frequency Setting
Intelligent Terminal
Inverter
Jogging Operation
PLC
Process Area
A device profile defines a common interface and behaviour for a range of
devices that can be grouped under a particular class.
DP-V1 implements PROFIBUS Acyclic data exchange, cyclic data exchange
and alarm handling at the application layer.
DP-V1 Class 2 (also known as MSAC2) messaging supports communication
relationships between the PROFIBUS DP slave and multiple PROFIBUS DP
masters.
EMC (ElectroMagnetic Compatibility) defines the extent to which a piece of
hardware will tolerate electrical interference from other equipment, and will
interfere with other equipment.
Electromagnetic Interference - In motor/drive systems, the switching of high
currents and voltages creates the possibility of generating radiated electrical
noise that may interfere with the operation of nearby sensitive electrical instru-
ments or devices. Certain aspects of an installation, such as long motor lead
wire lengths or an ungrounded chassis, tend to increase the chance of EMI.
Factory Automation Systems implement control systems in combination with
other applications of information technology to control industrial machinery
and processes. FA Systems are used to reduce the need for human interven-
tion in factory environments.
Fieldbus is the name of a family of industrial computer network protocols used
for real-time distributed control, now standardized as IEC 61158
A method of stopping a motor, caused when the Inverter simply turns OFF its
motor output connections. This may allow the motor and load to coast to a
stop, or a mechanical brake may intervene and shorten the deceleration time.
While frequency has a broad meaning in electronics, it refers to motor speed
for motor and drive systems. The output frequency of an Inverter is variable
and proportional to the attained motor speed.
A configurable input or output logic function on the Omron Inverters. Each ter-
minal may be assigned one of several functions.
A device that electronically changes DC to AC current through an alternating
process of switching the input to the output, inverted and non-inverted. It con-
tains three Inverter circuits to generate 3-phase output to the motor.
Usually done manually, a jog command from an operator's panel requests the
motor/drive system to run indefinitely at low speed in a particular direction.
This continues until the machine operator ends the jog operation.
A PLC (Programmable Logic Controller) is a digital computer used for the
automation of electromechanical processes.
The Process Area is a memory area in the controller that allows you to control
and monitor the Unit. The Fieldbus is used to continually refresh the Process
Area to and from decentralized peripherals. A Unit's status- and response to
a change in the Process Area therefore isn't instantaneous (The latencies and
jitter associated with the communication path limit the responsiveness of the
Unit).
APPENDIX A
Glossary
55