Allen-Bradley PowerFlex 20-COMM-D, User Manual

Page: 53 / 149

Using I/O Messaging 5-7
Figure 5.3 Tags for the Example Program
Figure 5.4 Example ControlLogix Ladder Logic Program
ControlLogix Example
Tag Name Type Tag Name Type
Local:1:I DINT[] DriveFeedback INT
Local:1:O DINT[] DriveInputImage INT[2]
DriveCommandClearFault BOOL DriveOutputImage INT[2]
DriveCommandJog BOOL DriveReference INT
DriveCommandStart BOOL DriveStatusFaulted BOOL
DriveCommandStop BOOL DriveStatusRunning BOOL
0
Local:1:O.CommandRegister.Run
1
Copy File
Source Local:1:I.Data[0]
Dest DriveInputImage[0]
Length
2
COP
2
DriveInputImage[0].1 DriveStatusRunning
3
DriveInputImage[0].7 DriveStatusFaulted
4
Copy File
Source DriveInputImage[1]
Dest
DriveFeedback
Length 1
COP
5
DriveCommandStart DriveOutputImage[0].1
6
DriveCommandStop DriveOutputImage[0].0
7
DriveCommandJog DriveOutputImage[0].2
This rung enables the DeviceNet scanner.
This rung copies the 32-bit DeviceNet scanner input image into
an array of two 16-bit words. The length in this instruction is two
because two 16-bit array elements of the destination are used.
These rungs read the Running and Faulted status bits from the
input image of the drive and place the data in respective tags.
This rung reads the drive’s Feedback word and places it in
the Feedback tag.
These rungs move the inputs of the operator from the
operator station to the drive’s output image.