Functionality
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The AND function is used to form general combinatory expressions with boolean variables. The AND
function block has four inputs and two outputs. One of the outputs is inverted. The output signal is 1 if
all input signals are 1.
Default value on all four inputs is logical 1 which makes it possible for the user to just use the
required number of inputs and leave the rest unconnected. The output OUT has a default value 0
initially, which suppresses one cycle pulse if the function has been put in the wrong execution order.
Function block
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AND
INPUT1
INPUT2
INPUT3
INPUT4
OUT
NOUT
IEC09000289-1-en.vsd
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Figure 58: AND function block
Signals
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Table 98: AND Input signals
Name Type Default Description
INPUT1 BOOLEAN 1 Input signal 1
INPUT2 BOOLEAN 1 Input signal 2
INPUT3 BOOLEAN 1 Input signal 3
INPUT4 BOOLEAN 1 Input signal 4
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Table 99: AND Output signals
Name
Type Description
OUT BOOLEAN Output signal
NOUT BOOLEAN Inverted output signal
Settings
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The function does not have any parameters available in Local HMI or Protection and Control IED
Manager (PCM600).
11.1.1.10 Set-reset memory function block SRMEMORY
Identification
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Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Set-reset memory function block SRMEMORY - -
Functionality
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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 to the state it had
before or if it will be reset. In SRMEMORY, the SET input has priority over RESET input.
Section 11 1MRK 511 557-UEN Rev. A
Logic
122
Technical Manual
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