Rockwell Automation GMLC Reference Manual User Manual
Page 726
Publication GMLC-5.2 - November 1999
Using the Dedicated Discrete Inputs
689
The recommended ladder logic for homing axes is shown below. Only
axes 0 and 1 are shown, but axes 2 and 3 are handled in the same manner.
The Rack Address in the motion controller is set to 5 and the Starting
Group parameter to 0. Thus the dedicated discrete RIO bits appear in I/O
group 1 of rack 5 (I/O:051).
Program Listing Report
PLC-5/30
Rung 2:1
| Home
Axis 0
|
| Axis 0
Selected
|
|
I:002
O:051
|
+----] [-----------------------------------------------------( )-----+
|
01
00
|
Rung 2:2
| Home
Axis 1
|
| Axis 1
Selected
|
|
I:002
O:051
|
+----] [-----------------------------------------------------( )-----+
|
02
01
|
Rung 2:3
|
Home
|
|
Axis 0
Selected
|
|
Selected
Axes
|
|
O:051
O:051
|
+-+---] [----+-----------------------------------------------( )-----+
| |
00
|
10
|
| |Axis 1
|
|
| |Selected
|
|
| |
O:051
|
|
| +---] [----+
|
|
01
|
!
ATTENTION: Do not use the PLC ladder logic shown here
for homing axes in the same PLC program with the ladder
logic shown later for jogging axes or improper operation can
result.