Multiple Memory - Mitsubishi Electric WS0-CPU0 Operating Manual

Melsec ws series, safety controller setting and monitoring tool
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Note
Table 36:
Truth table for the JK Flip-
Flop function block
Figure 107:
Logic connections for the
multiple memory function
block
Logic programming – Function blocks
Truth table for the JK Flip-Flop function block
The following applies for the truth table in this section:
 "0" means logic Low.
 "1" means logic High.
 "↑" means that a rising edge has been detected at the input.
 "↓" means that a falling edge has been detected at the input.
 "n–1" references the preceding value.
 "n" references the current value.
 "x" means "any" = "0" or "1".
The following truth table is valid for a configuration of the JK Flip-Flop function block
with no input inverted.
J input
K input
x
x
x
x
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
9.7.9

Multiple memory

Function block diagram
General description
Using the multiple memory function block the state of up to 7 inputs can either be
forwarded unchanged or saved depending on the Latch input.
If the Latch input is low, the state of inputs 1 to 7 is forwarded unchanged to the
outputs 1 to 7.
If the Latch input changes from low to high, then the current state of inputs 1 to 7 is
saved and output on outputs 1 to 7 as long as the Latch input is high.
The Latch output corresponds to the Latch input.
Clock input
Output Q
n–1
0, 1 or ↓
0
0, 1 or ↓
1
0
1
0
1
0
1
0
1
Chapter 9
Output Q
Output /Q
n
0
1
1
0
0
1
1
0
0
1
0
1
1
0
1
0
1
0
0
1
134
n

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