Trend file, Plc block transfer instruction data, Message operation – Rockwell Automation 1336T PLC Comm. Adapter, Series B, FRN 2.xx-3.xx User Manual
Page 202: Example, Number of trends available
7–56
Publication 1336 FORCE–5.13 –– September, 1998
The Number of Trends Available function indicates how many trend
files the drive supports.
PLC Block Transfer Instruction Data
BTW instruction length:
3 words
BTR instruction length:
3 words
Header
Word 1
Header
Word 1
Header
Word 2
Header
Word 2
Header
Word 3
Trends Available
Message Structure
Header
Word 3
0
PLC Decimal Value
4096
PLC Decimal Value
4096 –– Message OK
–28672 –– Message Error
Message Length
3
Message Length
3
PLC Request –– Block Transfer Write
Drive Response –– Block Transfer Read
Message Operation
You can use the Number of Trends Available function to request the
number of trends that the drive supports. This function always
returns 4.
Example
In this example, a message was sent to the drive to request the
number of trend files available. The drive response indicates that
four trend files are available.
1
0
N10:10
2
3
4
5
6
7
8
9
N10:90
BTW
Data File
BTR
Data File
Data Format
0
4
3
3
4096
4096
Trend File
Number of Trends Available