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2.4.3
Protocol Building Blocks
The following building blocks are used in Anybus Configuration Manager to describe the
subnetwork communication.
Group
A
group
does not represent any specific device on the CAN subnetwork, it is only a
means to structure the
transactions
that have been defined for the gateway in Anybus
Configuration Manager.
Each group can be associated with any number of transactions, however the total
number of transactions in a configuration is limited to 128.
Transaction
A
transaction
consists of one or more
CAN frames
. Each transaction is associated with a
set of parameters controlling how and when to use it on the subnetwork. There are 5
transaction types:
produce
,
consume
,
query-response
,
dynamic produce
and
dynamic
consume
. A group can contain transactions of all three types simultaneously.
A total of 128 transactions can be configured.
Dynamic Transaction
A
dynamic transaction
makes it possible for a network master to change selected
parameters during runtime. The parameters are mapped to the Output or General Data
areas and cannot be changed using Anybus Configuration Manager.
A dynamic transaction can only consist of a single CAN frame which in turn can only hold
one data object.
Only one
dynamic produce
transaction and one
dynamic consume
transaction can be
configured.
CAN Frames
CAN frames
are low level entities used to compose
transactions
. Each frame carries an
11-bit or 29-bit identifier and can hold up to 8 bytes of data.
A total of 256 CAN frames can be configured.
Anybus
®
Communicator
™
CAN PROFINET
®
IRT (2.32) User Manual
SCM-1202-035 1.2 en-US