Rockwell-automation GMLC Reference Manual Manuale Utente Pagina 726

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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.
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