Rockwell Automation 20D PowerFlex 700S AC Drives with Phase II Control Reference Manual - Manual (Page 194)

194 Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011
Chapter 1 Detailed Drive Operation
The torque reference can be utilized when a master/slave multi-drive system is
configured. The torque reference into the “slave” can be scaled to create the
proper torque output. Keep in mind that the motors may be different ratings and
this function is used to help the “system” share the load.
Parameter 115 [Torque Trim] can be used to trim the torque. For example,
[Torque Trim] can be limited to an analog input or to the Process PI output.
Once the scaling is complete on both [Torque Ref1] and [Torque Ref2], the
output is summed with the output of the [Torque Trim].
Trending Trending can be used to trend up to 4 parameters with 1023 samples for each
parameter at a rate between 0.2 ms and 1 second per sample.
Configuration
1. Set the trend rate in parameter 559 [Trend Rate] between 0.2 ms and 1000
ms (1 second). There are a total of 1024 samples that will be taken at this
rate.
2. For the trigger, two values can be compared or you can look at a single bit.
To compare two DInt parameters for the trigger, use parameters 560
[Trend TrigA DInt] and 562 [Trend TrigB DInt]. To compare two floating
point parameters for the trigger, use parameters 561 [Trend TrigA Real]
and 563 [Trend TrigB Real]. To trigger on a single bit, link parameter 564
[Trend Trig Data] to the parameter that will be watched and set parameter
565 [Trend Trig Bit] to the bit that you want to watch in parameter 564.
3. Up to four different parameters can be trended. Link parameters 570
[Trend In1 DInt] or 571 [Trend In1 Real], 574 [Trend In2 DInt] or 575
[Trend In2 Real], 578 [Trend In3 DInt] or 579 [Trend In3 Real], and 582
[Trend In4 DInt] or 583 [Trend In4 Real], depending on the data type, to
the parameters you would like to trend.
4. Set parameter 556 [Trend Control], bits 1 “In 1 Real”…4 “In 4 Real” to
correspond to the data type for the parameters you are trending. When the
corresponding bit is off (0), the parameter will be DInt. When the
corresponding bit is on (1), the parameter will be Real.
5. Set parameter 566 [Trend PreSamples] to the number of data points to
store prior to the trend trigger (pre-trigger data). This can be set between 0
and 1022 samples.
6. Set parameter 556 [Trend Control], bit 0 “Enbl Collect” to enable the
trend. When the trend is triggered, parameter 557 [Trend Status], bit 1
“Triggered” will be set. When the trend has completed parameter 557
[Trend Status], bit 2 “Complete” will be set.