ABB RES670 Technical Manual page 437

1MRK 511 408-UUS A
Phasor measurement unit RES670 2.2 ANSI
Technical manual
• AND function block. The AND function is used to form general combinatory
expressions with boolean variables. The AND function block has up to four inputs
and two outputs. One of the outputs is inverted.
• GATE function block is used for whether or not a signal should be able to pass
from the input to the output.
• INVERTER function block that inverts the input signal to the output.
• LLD function block. Loop delay used to delay the output signal one execution
cycle.
• OR function block. The OR function is used to form general combinatory
expressions with boolean variables. The OR function block has up to six inputs
and two outputs. One of the outputs is inverted.
• PULSETIMER function block can be used, for example, for pulse extensions or
limiting of operation of outputs, settable pulse time.
• RSMEMORY function block is a flip-flop that can reset or set an output from two
inputs respectively. Each block has two outputs where one is inverted. The
memory setting controls if, after a power interruption, the flip-flop resets or
returns to the state it had before the power interruption. RESET input has priority.
• SRMEMORY function block is a flip-flop that can set or reset an output from two
inputs respectively. Each block has two outputs where one is inverted. The
memory setting controls if, after a power interruption, the flip-flop resets or
returns to the state it had before the power interruption. The SET input has
priority.
• TIMERSET function has pick-up and drop-out delayed outputs related to the
input signal. The timer has a settable time delay.
• XOR is used to generate combinatory expressions with boolean variables. XOR
has two inputs and two outputs. One of the outputs is inverted. The output signal
OUT is 1 if the input signals are different and 0 if they are the same.
Section 15
Logic
431