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Command Reference: Function Blocks Section 6-5
Truth Table
0: OFF, 1: ON
Error Handling and Error Resetting
Note If more than one input is ON, the output corresponding to the first input to turn
ON will turn ON for 2 s. If more than one input turns ON in the same NE1A-
series Controller cycle, then all outputs will turn OFF.
Timing Chart
Inputs Outputs
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
100000001 0 0 0 0 0 0 0
010000000 1 0 0 0 0 0 0
001000000 0 1 0 0 0 0 0
000100000 0 0 1 0 0 0 0
000010000 0 0 0 1 0 0 0
000001000 0 0 0 0 1 0 0
000000100 0 0 0 0 0 1 0
000000010 0 0 0 0 0 0 1
Error condition Behavior for error detection Resetting the
error condition
Output Fault Present
More than one input was
ON for more than 2 s
OFF
(safety state)
ON
Remove the cause
of the error. (Cor-
rect system so that
only 1 contact is
ON.)
All inputs were OFF for
more than 2 s
Input1
Output2
Input2
Fault
Present
Output1
Input3
Output3
Idle to RUN 2 s 2 s 2 s
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