Allen-Bradley 1444-TSCX02-02RB User Manual page 407

Table 136 - Common Services
Service Implementation
Code
Class Instance
0x01 x -
0x0E x -
Object Specific Services
Service Implementation
Code
Class Instance
0x4B x -
Data types that consist of multiple bytes are transferred in little-endian format
(least significant byte first).
Also, a data communications session starts at the first service request and ends
after the final response of the exchange, but is subject to an (inactivity) time-
out of 30 seconds.
0x4B Event Log Record Request
Event log entries are retrieved using a series of request/response unconnected
messages. One service is used to both start and continue with a session. The
first request initiates the session and subsequent requests return values that the
service returns. When the packet count down value that is returned reaches 0,
the session is completed.
The instance and attribute can be set to 1, but they are ignored.
The host, as part of an 0x4B service request, sends the following Request
Parameters. This process is identical to the Data Manager Object (0x38B),
Service 0x4C CM Buffer Upload. Both services call the same service handling
code. That code is why the buffer select codes do not overlap with the codes for
the data manager object.
Table 137 - Event Log Entries
Byte Structure
Offset Member
Within
Structure
0 BufferSelect
2 RequestedCount
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Service Name Description of Service
Get Attributes All Returns the contents of the specified attribute
Get Attribute Single Returns the contents of the specified attribute
Service Name Description of Service
Event log upload This service allows block upload of the Event data
using a predefined format. Partial uploads (such as
the last 250 events) is supported.
Data Description
Type
INT Specify the buffer to retrieve the data from:
eEVENT_LOG (26)
The BufferSelect does not change during a session.
UINT RequestedCount = 0 returns all records in the buffer.
RequestedCount = 1 returns the most recently collected record.
Any other positive count returns that number of records from the
buffer. If the count is greater than the max available records, the
max available records is returned instead.
The RequestedCount does not change during a session.
CIP Objects Appendix A
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