Rockwell Automation Allen-Bradley PowerFlex 700S - Time Function Generator; Torque Reference; Torque Reference Input

Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011 193
Detailed Drive Operation Chapter 1
Time Function Generator
The time function generator ramps the output of the function generator at the
rate in parameter 202 [Time Axis Rate].
• When parameter 153 [Control Options], bit 24 “Time Axis En” or
parameter 151 [Logic Command] bit 3 “Time Axis En” =1 the output
ramps from 0.0000 to 1.0000 at the rate set in [Time Axis Rate].
• When parameter 153 [Control Options], bit 24 “Time Axis En” or
parameter 151 [Logic Command], bit 3 “Time Axis En” = 0 the output
ramps from 1.0000 to 0.0000 at the rate set in [Time Axis Rate].
Torque Reference
When the PowerFlex 700S is operated in torque mode, an external signal is used
for a torque reference. Refer to Figure 29
(below) for the firmware diagram.
Figure 29 - Torque Reference Firmware Diagram
Torque Reference Input
Parameter 111 [Torque Ref1] is used to supply an external reference for desired
torque. The scaling of this parameter is a per unit type, where a value of 1.0 is
equal to the rated motor torque.
[Torque Ref1] is then divided by parameter 112 [Torq Ref1 Div]. This defines
the scaled [Torque Ref1].
Parameter 113 [Torque Ref2] is used to supply an external reference for desired
torque. The scaling of this parameter is a per unit type, where a value of 1.0 is
equal to the rated motor torque.
[Torque Ref2] is then multiplied by parameter 114 [Torq Ref2 Mult]. This
defines the scaled [Torque Ref2].
OR
202 203
Time Func Generator
Control Options
(Time Axis En)
Logic Command
(Time Axis En)
Time Axis Rate
Time Axis Output
153 24
151 3
1
111
X
112
113
114
115
Torque Ref 1
Torque Ref1 Div
Torque Ref 2
Torque Ref2 Mult
Torque Trim
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