Rockwell Automation 1395 Node Adapter Board - Manual (Page 47)

Chapter 3
Functional Description
3-35
Message Operation The READ TREND FILE function is used by a PLC Controller to get
information about the Drives trend buffers. This data includes both the
setup information and the data samples for each buffer. The BTW message
contents determine what data will be returned by the Drive. The following
information shows what data will be returned by the Drive (in the BTR
instruction) for the Block number specified.
Refer to the Drive instruction manual for detailed information on Trend
buffer operation and use.
Block #0:
BTR Instruction Length: 19
MSG Size in Elements: 19
BTW
Trend Number – The trend buffer number of
the data being provided.
Operand X – One of the parameters used to
define the trigger condition.
Operand Y – One of the parameters used to
define the trigger condition.
Par # Monitored – The parameter that is be-
ing monitored by the selected Trend buffer.
Operator – The operator used to determine
what condition(s) will cause a trigger to occur.
0
0
270
See Note
Description
0
Trend Number
Operand X
Operand Y
Par # monitored
Operator Type
Sample Time
Post Samples
Year
Month (1 – 12)
Day (1 – 31)
Hour (0 – 23)
Second (0 – 59)
Millisecond (0 – 999)
Monitored Parameter
Descriptor
Val
1
2
3
4
5
6
7
8
Greater Than (GT)
Less Than (LT)
Equal To (EQU)
Not Equal To
(Not__EQU)
AND (AND)
Not AND (NAND)
OR (OR)
Not OR (NOR)
Sample Time – The rate at which the monitored parameter is sampled.
Post Samples – The number of samples taken after the trigger condition is
detected.
Year – An integer value representing the year the trigger condition was
detected.
Month (1 – 12) – An integer value representing the month the trigger
condition was detected.
Day (1 – 31) – An integer value representing the day the trigger condition
was detected.