Functionality
The Set-Reset function SRMEMORY is a flip-flop with memory that can set or reset
an output from two inputs respectively. Each SRMEMORY function block has two
outputs, where one is inverted. The memory setting controls if the flip-flop after a
power interruption will return the state it had before or if it will be reset. For a Set-
Reset flip-flop, SET input has higher priority over RESET input.
Table 158:
Truth table for the Set-Reset (SRMEMORY) function block
SET
RESET
OUT
NOUT
1
0
1
0
0
1
0
1
1
1
1
0
0
0
0
1
Function block
SRMEMORY
SET
RESET
OUT
NOUT
IEC09000293-1-en.vsd
IEC09000293 V1 EN
Figure 90:
SRMEMORY function block
Signals
Table 159:
SRMEMORY Input signals
Name
Type
Default
Description
SET
BOOLEAN
0
Input signal to set
RESET
BOOLEAN
0
Input signal to reset
Table 160:
SRMEMORY Output signals
Name
Type
Description
OUT
BOOLEAN
Output signal
NOUT
BOOLEAN
Inverted output signal
1MRK 505 277-UUS C
Section 11
Logic
203
Technical Manual
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