Rockwell Automation 1734-ADNX POINT I/O DeviceNet Adpater User Manual - Manual (Page 8)

Publication 1734-UM002C-EN-P - July 2003
Preface 4
Cyclic DeviceNet communications method in which the adapter
sends data cyclically based on a configured time value. Data is
independently received cyclically from the sender. Data in both
directions can be acknowledged or unacknowledged
depending on the run time configuration of the system.
MAC ID Media Access Control Identifier (DeviceNet network address).
Master A DeviceNet network device (e.g., 1771-SDN) that initiates
communication with DeviceNet slave devices (e.g., POINT I/O
modules) to retrieve data. The master only receives
unprompted data when the slave is enabled for COS and there
is a change in the device’s operating state.
MAX BACKPLANE ID A unique attribute, Max(imum) Backplane MACID, has
been added to 1734-ADNX. This value represents the highest
node address of a module residing on the backplane. This
value must be greater than or equal to the rightmost
backplane POINT I/O module, but must be less than that of
any non-backplane Subnet module.
Offline State of the adapter when it is not powered or maintaining
normal communications exchanges with other DeviceNet
devices.
Online State of the adapter when it is powered and maintaining
normal communications exchanges with other DeviceNet
devices.
PointBus The POINT I/O backplane. PointBus maintains all DeviceNet
network protocol but also offers configuration capabilities.
Polled DeviceNet communications method in which a module sends
data in response to received data.
Primary Network The Primary DeviceNet Network, and it is defined as the
DeviceNet link that provides the direct connection between
the POINT DeviceNet adapter and a DeviceNet scanner
RSNetWorx for DeviceNet Configuration software for the adapter and Subnet modules.
Scanlist The list of Subnet modules connected to the adapter. When
ADR is active, the scanlist stores the configured values of
each of the Subnet modules’ configurable parameters. When
ADR is not active, the scanlist stores only the module identity
information.
Scanner Operating state of the 1734-ADN(X) when it retrieves I/O data
from Subnet modules.
Slave A DeviceNet network device that cannot initiate
communication (except when configured with COS enabled)
but responds to a DeviceNet master device.
Strobe Adapter sends data in response to the strobe command. The
single bit allocated to the adapter in the strobe message is not
used. If the configured size of the input data (sent from the
adapter) is greater than 8 bytes, the strobe connection
establishment will fail. In this case, the input size must be
reconfigure to 8 bytes or less.
Term: Definition: