Mitsubishi Electric PLK - G Series Technical Manual page 25

4.Block diagram (input control section)
Standard A
5.Explanation of operations (input control section)
The input signal passes through the A point, B point and C point of the input port, and finally is connected
to the physical input
Inputs the signal to the input port from an external source.
A point
(1) When the logic setting is set to "normal"(OF), the operation will be the same as the input
B point
signal A point.
(2) When the logic setting is set to "reverse"(ON), the operation will be the reverse of the input
signal A point.
(1) When the operation selection is set to "normal"(NO), the operation will be the same as the
C point
input signal B point.
(2) When the operation selection is set to "alternate"(AL), the signal will turn ON at the first rising
edge, turn OFF at the second rising edge, and will turn ON at the third rising edge. The signal
waveform will repeatedly turn ON and OFF at the input rising edge.
The C point signal input and controlled in the above manner is input into the physical input port.
Logic
changeove
Logic operation
selection when
logic changeover is
set to "normal"
Logic operation
selection when logic
changeover is set to
"reverse"
OF
ON
B
Logic changeover
Input port A
"Normal" B
"Reverse" B
"Normal" C
"Alternate" C
"Normal" C
"Alternate" C
NO
AL
Alternate
C
Operation changeover
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Physical input