36 Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011
Chapter 1 Detailed Drive Operation
“Data In” Parameters
Parameters 651 [DPI Data In A1] through 658 [DPI Data In D2] are inputs to
the drive from the controller and are used to write to parameters. To write to a
parameter, that parameter must be linked to one of parameters 651 through 659.
Then set the appropriate bit in parameter 650 [DPI In DataType] to indicate if
that parameter is a DInt (double integer) or Real (floating point). Turn the bit off
for DInt and turn the bit on for floating point. A total of eight parameters can be
written with the “Data In” Datalink parameters.
Example Configuration #1 - Writing a DInt Parameter using a Datalink
• Parameter 740 [Position Control] is linked to parameter 651 [DPI Data In
A1]
• Parameter 650 [DPI In DataType] bit 0 “DPI A1 Real” is set to 0
The value that is sent to [DPI Data In A1] from the controller will show up in
[Position Control].
Example Configuration #2 - Writing a Real Parameter using a Datalink
• Parameter 111 [Torque Ref1] is linked to parameter 651 [DPI Data In A1]
• Parameter 650 [DPI In DataType] bit 0 “DPI A1 Real” is set to 1
The value that is sent to [DPI Data In A1] from the controller will show up in
[Torque Ref1].
“Data Out” Parameters
Parameters 660 [DPI Data Out A1] through 667 [DPI Data Out D2] are
outputs from the drive to the controller and are used to read parameters. To read
to a parameter, one of the parameters 660 through 667 must be linked to it. Then
set the appropriate bit in parameter 659 [DPI Out DataType] to indicate if that
parameter is a DInt or floating point. Turn the bit off for DInt and turn the bit on
for floating point. A total of eight parameters can be read with the “Data Out”
parameters.
Example Configuration #1 - Reading a DInt Parameter using a Datalink
• Parameter 660 [DPI Data Out A1] is linked to parameter 741 [Position
Status]
• Parameter 659 [DPI Out DataType] bit 0 “DPI A1 Real” is set to 0
The value from [DPI Data Out A1] to the controller contains the value of
[Position Status].
Example Configuration #2 - Reading a Real Parameter using a Datalink
• Parameter 660 [DPI Data Out A1] is linked to parameter 307 [Output
Vo l t a g e ]
• Parameter 659 [DPI Out DataType] bit 0 “DPI A1 Real” is set to 1
The value from [DPI Data Out A1] to the controller contains the value of
[Output Voltage].
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