Rockwell Automation 20D PowerFlex 700S AC Drives with Phase II Control Reference Manual - Manual (Page 30)

30 Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011
Chapter 1 Detailed Drive Operation
6. The tag “PF700S_P303_MotorTorqueRef ” contains the value of
parameter 303.
Explicit Messaging:
When using explicit messaging on DeviceNet, ControlNet, or Ethernet in the
ControlLogix system, the message type CIP Generic is used. The data is
transferred over ControlNet in the same data type as the parameter in the
PowerFlex 700S. Make sure that the data type for the Source and Destination tags
in your ControlLogix message instruction matches the data type for the
parameter in the PowerFlex 700S. Also, the Source Length in the ControlLogix
message instruction must match the size of the Source data. For example, to send
an explicit message to write to parameter 12 [Speed Ref 2], which is a floating
point:
1. The Source Element tag would be of type REAL.
2. The Source Length would be 4 bytes since a REAL data type takes up 4
bytes of data.
PLC 5 or SLC System
Reference/Feedback Programming
The reference is scaled so that base motor speed = 32767. The PLC can only
handle 16-bit integers, so the reference has to be handled differently to account
for references above 32767 or below -32768. The following example shows how