Mitsubishi Electric WS0-CPU0 - RS Flip-Flop

Chapter 9
132
Logic programming – Function blocks
Function block parameters
Parameter Possible values
Number of inputs
(without Release input)
1 to 7
Invert input x
Each input of this function block can be inverted (see section
9.5.2)
Invert Release
Truth table
For the truth table identified in this section, the following applies:
 “0” means logic low.
 “1” means logic high.
Release Output X
0
0
1
Input x
9.7.7 RS Flip-Flop
Function block diagram
General description
The RS Flip-Flop function block stores the last value of the inputs Set or Reset. It is
used as a simple storage cell. The Reset signal has a higher priority than the Set
signal. If Set was High last, output Q is High and output /Q (Q inverted) is Low. If the
Reset input was High last, output Q is Low and output /Q is High.
Parameters of the function block
Parameter Possible values
Invert Set
Each input of this function block can be inverted (see Section 9.5.2).
Invert Reset
Table 31:
Parameters for the multiple
release function block
Table 32:
Truth table for the multiple
release function block
Figure 105:
Function block diagram for
the RS Flip-Flop function
block
Table 33:
Parameters of the RS Flip-
Flop function block