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Manual – MOVI-PLC® advanced DHF41B DeviceNet and PROFIBUS DP-V1 Fieldbus Interfaces
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6
Terms and definitions
DeviceNet Operating Characteristics
6.4
Terms and definitions
Term
Description
Allocate
Provides a service for setting up a connection.
Attribute
Attribute of an object class or instance. Describes the characteristics of the
object class or instance in more detail.
BIO - Bit-Strobe I/O
All stations can be addressed with a broadcast message. The addressed
stations respond with the process input data.
Class
DeviceNet object class
Device-Net scanner
Plug-in module for the Allen Bradley PLC which connects the PLC fieldbus to
the peripheral devices.
DUP-MAC check
Duplicate MAC-ID test
Explicit message body
Includes the class no., instance no., attribute no. and the data.
Explicit message
Parameter data message; assists in addressing the DeviceNet objects.
Get_Attribute_Single
Read service for a parameter.
Instance
Instance of an object class. Divides the object classes into additional
subgroups.
MAC ID
Media Access Control Identifier: node address of the device.
M-File
Provides the data range between the PLC and the scanner module.
Mod/Net
Module/network
Node ID
Node address = MAC-ID
PIO - Polled I/O
Process data channel of DeviceNet; allows process output data to be sent and
process input data to be received.
Release
Provides a service for setting up a connection.
Reset
Provides a service for resetting an error.
Rung
SLC500 program line
Service
Service performed via bus, e.g. read service, write service, etc.
Set_Attribute_Single
Write service for a parameter.
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Содержание DHF41B
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