Rockwell Automation 1336T PLC Comm. Adapter, Series B, FRN 2.xx-3.xx - Manual (Page 252)

9–10
Publication 1336 FORCE–5.13 –– September, 1998
In this first example, when the torque command is greater than 25%,
the trend triggers and 50 post samples are taken at a rate of 4
milliseconds. To set up this trend, you would need to do the
following:
1. Decide which trend you are setting up (trend 1, trend 2, trend 3,
trend 4). For this example, trend 1 is used.
2. Link parameter 454 (Trend Input 1) to parameter 167 (Internal
Torque Cmd).
3. Link parameter 455 (Tr1 Opnd Parm X) to parameter 167
(Internal Torque Cmd).
4. Select GT for parameter 457 (Tr1 Operator).
5. Enter 25 for parameter 456 (Tr1 Opnd Parm Y).
6. Enter 50 for parameter 459 (Tr1 Post Samples).
7. Enter 4 for parameter 458 (Tr1 Sample Rate).
8. Enter 1 for Trend Continuous Trigger to specify that a one–shot
operation is to be performed.
9. Link the Trend Output parameter to the Analog Output parameter.
In the second example, the trend triggers and begins taking 100 post
samples at a rate of 2 milliseconds when the velocity feedback
parameter is greater than the velocity reference parameter.
1. Decide which trend you are setting up (trend 1, trend 2, trend 3,
trend 4).
2. Link the Trend Input parameter to the velocity feedback
parameter.
3. Link the Operand X parameter to the velocity feedback
parameter.
4. Select GT for Operator.
5. Link the Operand Y parameter to the velocity reference
parameter.
6. Enter 100 for Post Samples.
7. Enter 2 for Sampling Rate.
8. Enter 1 for Trend Continuous Trigger to specify that a one–shot
operation is to be performed.
9. Link the Trend Output parameter to the Analog Output parameter.
Example Trends