Eaton Rapid Link 5, Руководство пользователя

Страница: 231 / 249

9 Communication
9.2 EtherNet / IP
Rapid Link 5 · RAMO5 · RASP5 05/20 MN034004EN www.eaton.com
227
9.2.15 Acyclic data
The drive parameters are accessed via the following object classes:
Example
Assembly objects (0x04)
Input and output assembly objects are groups of multiple individual objects
that are used in order to be able to easily read or write large data volumes
with a single connection.
Acyclic data of the Rapid Link 5 module is accessed via object class 0x04.
Select the value of 0x18 (read parameter) or 0x19 (write parameter) for
service.
For instance attributes, select the value assigned to the corresponding
parameter.
Class Service name and code Description
0x0F Parameters 0x0E Get_Attribute_Single Delivers the contents of a single attribute.
0x10 Set_Attribute_Single Modifies a single attribute.
0x44 Modbus 0x4E Read_Holding_Registers Delivers the contents of the class or instance
of the relevant object.
0x50 Write_Holding_Registers Modifies the contents of the instance or the
class attributes of the relevant object.
0x04 Assembly 0x18 Get_Member Delivers the contents of the class or instance
of the relevant object.
0x19 Set_Member Modifies the contents of the instance or the
class attributes of the relevant object.
￫
The associated instance number can be found in the
￫ Table 55 and ￫ Table 56.
￫
Multiple messages cannot be sent at the same time.
Perform the following steps (within the PLC program) to trans-
mit messages acyclically:
• Interrupt cyclic communication.
(Ask your PLC manufacturer how to interrupt cyclic commu-
nication.)
• Send an acyclic query.
• Receive acyclic data.
• Restart cyclic communication.