Rockwell Automation 1336T ControlNet Frn1.02 Rev 1.5 - Manual (Page 120)

4–78 Using Unscheduled Messaging
Publication 1336 FORCE–5.18 ––March, 1999
The Stored File Data function allows you to read the data values in
the stored data file buffer when the trigger condition occurs.
PLC Block Transfer Instruction Data
PLC Message Write instruction length: 3 words
PLC Message Read instruction length: 35 words
Header
Word 1 Header
Word 1
Header
Word 2 Header
Word 2
Header
Word 3
Trend Number
Message Structure
PLC Decimal Value
4101
PLC Decimal Value
4101 –– Message OK
–28667 –– Message Error
Message Length
3 Message Length
35
PLC Request –– PLC Message Write
Drive Response –– PLC Message Read
Data
Word 4
Data Sample 1
Data
Word 5
Data Sample 2
•
•
Data
Word 34
Data Sample 31
Data
Word 35
Data Sample 32
•
•
•
•
•
•
•
•
•
•
Header
Word 3
Offset Trend
Number
(Bits 0 –11)
Message Operation
You can use the Stored File Data function to read the data points in
the stored buffer within the drive for the specified trend file.
The following are the valid trend numbers:
This
number:
Specifies that the command is to be sent for:
4096 Trend 1
8192 Trend 2
12228 Trend 3
16384 Trend 4
Trend File
Stored File Data