Rockwell Automation 1203-CN1 ControlNet Communications Module 1203-CN1 - Manual (Page 65)

Publication 1203-5.13 – February, 2002
PLC Ladder Logic Programming 5-5
The portion of the program shown in Figure 5.2 controls the starting
and stopping of the drive. When the start button is pushed, the drive
will start. When the stop button is pushed, the drive will stop.
Figure 5.2
Start/Stop Logic
The portion of the program shown in Figure 5.3 allows the operator to
clear faults in the drive by pushing a Clear Faults button.
Figure 5.3
Clear Faults Logic
Start/Stop Logic
Note that commands sent to the drive should be maintained long enough for the drive to receive the command -- a bit that is true for
one PLC program scan may not be sufficient because of the asynchronous communication loops between the PLC and the drive. This
program does not include any logic for this purpose.
0000
I:000
0
Operator
Start
Pushbutton
N13:0
1
Drive
START
Command
Bit
0001
I:000
1
Operator
Stop
Pushbutton
N13:0
0
Drive
STOP
Command
Bit
Fault Clearing Logic
0002
I:000
2
Operator
Clear Faults
Pushbutton
N13:0
3
Drive
CLEAR FAULTS
Command
Bit