Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 450)

Troubleshooting and Diagnostics
19-19
Output Forces
0 1
1 0
0 0
0 0
1 1
0
0
0 0
1 1
1
1 0
1
1
0
0
0 1
1 1
1 0
0 0
1 1
0
1
0 0
1 0
Data Table
O0:xx
Force
Table Actual
Output
from
ladder
logic
to
output
devices
Output forces are written directly to the output device, and do not appear in the data
table. The value in the force table overrides the value in the data table. For example, if
O0:12 is forced to 1, it may still appear to be 0 in the data table and the ladder logic.
The actual output, and the output LED on the I/O module (if any) will be ON.
Input Forces
0 1
1 0
1 0
0 0
1 1
0
1
0 0
1 1
1
1 0
1
1
0
0
0 1
1 1
1 0
0 0
1 1
0
1
0 0
1 0
Actual
Input
Force
Table Data Table
I1:xx
from
input
devices
to
ladder
logic
Input forces are written to the data table, and have no effect on actual input. The value
in the force table overrides the actual input. For example, if I1:12 is forced to 1, it will
appear in the data table and ladder logic as 1, regardless of the data from the actual
input device.
The force indicator LED on the SLC 500’s front panel flashes if forces are present. A
steady light indicates that forces are present and enabled.