Rockwell Automation 1336T ControlNet Frn1.02 Rev 1.5 - Manual (Page 107)

4–65 Using Unscheduled Messaging
Publication 1336 FORCE–5.18 ––March, 1999
The Trend Status function allows you to read the status of the
specified trend file.
PLC Block Transfer Instruction Data
PLC Message Write instruction length: 3 words
PLC Message Read instruction length: 4 words
Header
Word 1 Header
Word 1
Header
Word 2 Header
Word 2
Header
Word 3
Trend Number
Message Structure
Header
Word 3
Trend Number
PLC Decimal Value
4097
PLC Decimal Value
4097 –– Message OK
–28671 –– Message Error
Message Length
3 Message Length
4
PLC Request –– PLC Message Write
Drive Response –– PLC Message Read
Data
Word 4
Status
Message Operation
You can use the Trend Status function to read the status of the trend
specified by Trend Number.
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
The following are the possible status values that can be returned in
word 4:
This
number:
Indicates that the trend is:
1 Stopped.
2 Running.
3
In the tripped trigger state. The condition has
become true, and the post samples are being taken.
4
In the forced trigger state. The trigger condition
was forced to be true so that the post samples
could be taken.
Trend File
Trend Status