Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 121)

Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013 121
Detail Drive Configuration and Operation Chapter 1
parameter. This allows speed trim 3 to be scaled “dynamically” with an input
signal if desired. An example would be to have an analog input linked to the scale
parameter. The speed trim and the scale would then affect the value sent to the
summation block.
The speed trim values are summed with the speed reference from the speed
reference control loop.
Autotune Speed Reference
During the inertia test, the autotune speed reference is used instead of the output
of the speed trim summation. Parameter 19 [Atune Spd Ref ] sets the speed for
the inertia test.
Bits 4, 5, and 8 in parameter 157 [Logic Ctrl State] control when the [Atune Spd
Ref ] is used.
• Bit 4 - “Inrta Tst En” turns on during the inertia test and allows the
autotune speed reference to bypass the output of the speed trim
summation.
• Bit 5 - “J Tst FulSpd” indicates that the inertia test reached the speed set in
[Atune Spd Ref ].
25
26
22
+
X
23
24
47
318
Ovr Smpl
4x
Speed Trim 3
SpdTrim 3 Scale
Spd Trim1 SpdRef
Speed Trim 2
STrim2 Filt Gain
SpdTrim2 Filt BW
Posit Spd Output
from Speed Control
- Reference [2H4]
from Position
Control [6H3] or [7H4] Lead Lag
(kn * s)+ wn
s + wn