Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 31)

Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013 31
Detail Drive Configuration and Operation Chapter 1
ControlLogix Programming
To setup the PowerFlex 700S drive to follow a speed reference from the 20-
COMM-C, parameter 691 [DPI Ref Select] must be set to “Port 5.” Parameter
16 [Speed Ref Sel] must be set to “Speed Ref DPI.”
Reference and Feedback values are floating-point values in the PowerFlex 700S.
Use the following logic to transmit and receive reference and feedback data as
unsigned integer data.
Reference to 700S
(Commanded RPM Base Motor Speed)
⁄
32767
------------------------------------------------------------------------------------------------------ =
MOV
CPT
MOV
Speed Reference Via ControlNet to a PowerFlex 700S using a 20-COMM-C module.
The first move instruction is only for visual indication of the speed reference.
Move
Source
CNet_Ref_RPM
1200.0
Dest CNet_Ref_RPM
1200.0
Compute
Dest
CNet_700S_Ref_Float
22114.959
Expression (CNet_Ref_RPM/Motor_Base_Speed)*Speed_Conversion_Constant
Move
Source
CNet_Ref_Float
22114.959
Dest PowerFlex700S_02:0.Data(1)
22115
Feedback RPM (700S Feedback 32767) Base Motor Speed
× ⁄
=
CPT
MOV
Convert Speed Feedback from 700S via 20-COMM-C
Feedback is returned as a 0 to 32767 number for 0 to Base Speed
Compute
Dest
CNet_700S_Fdbk
1897
Expression (CNet_700S_Fdbk_Float/Speed_Conversion_Constant)*Motor_Base_Speed
Move
Source
PowerFlex700S_02:1.Data[2]
22114.959
Dest CNet_700S_Fdbk_Float
34969.0