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No.EX##-OMI0032-C
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Definition and terminology
Terms
Meaning
Address
(Station address)
A number allocated to identify the unit connected on the PROFIBUS DP
network. It is not allowed to be duplicated.
A
Attenuation factor
A dissipation of signal wave form in proportion to a length of communication
line. Normally, indicated by dB/ft (decibel per feet).
BF
Abbreviation of BUS FAULT. It shows the communication of the GW unit.
B
Branch wiring
A method to branch and connect a communication line and power line from
GW unit to SI unit and Input unit.
Class 2 master
Master for control, commissioning, and configuration functions.
Communication connector
A connecting part to transmit a communication signal which goes and returns
between equipments in field bus.
Communication port
A connection port to distribute a communication line and power line from GW
unit to SI unit and Input unit.
Communication speed
A speed at which data is sent and received in field bus etc. It depends on an
equipment (PLC etc.) at high side and is indicated by bps (bit per second).
Connector lock pin
A pin that prevents the connector for connecting load to be connected to SI
unit from coming off.
Conductor resistance
A electric resistance of a conductor. It is a value to show ease of current flow.
Current consumption
A current necessary to operate a product normally. In this case, the current
applied to a load is not included.
Current sink type
(NPN output)
An output configuration of an input equipment which uses NPN transistor for
signal outputting part. It sinks current with input and that is the reason why it
is called sink.
C
Current source type
(PNP output)
An output configuration of an input equipment which uses PNP transistor for
signal outputting part. It sources current with input and that is the reason why
it is called source.
Data rate
An amount of data which can be sent from one equipment to the other
equipment. Referred to as transmission speed of data.
DIN rail
A metallic rail conforming with DIN (German Federation) standard.
D
DIA
Abbreviation of Diagnosis. It shows the GW unit status.
Enclosure (IP)
An abbreviation of Ingress Protection. It is a standard related to protection of
a product from foreign matters (hand, steel ball, steel wire, dust, water etc.).
E
Enhancing diagnosis information
Diagnosis information from GW unit. It is composed of standard diagnosis
information provided with PROFIBUS DP and peculiar diagnosis information
to the GW unit.
FG
An abbreviation of frame ground meaning a body ground. Used to show a
ground simply.
Field bus
A standard which uses digital communication to transmit a signal between an
equipment running at factory and field (instrumentation and operation
equipment) and controller.
F
FREEZE function
Function that input data of GW unit synchronizes with FREEZE command
from master.
GND
An abbreviation of ground meaning reference voltage for signal. It has a
same potential level as a shield wire (sheath) of signal line and connector
and is referred to as a reference potential to transmit an electrical signal.
G
GSD file
File which describes the master data of product.
