Mitsubishi Electric PLK-J-CU-20 Technical Manual page 20

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 signal
B point
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 input
C point
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
r
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