ABB ACSM1 Series, Manual

Page: 369 / 510

Standard function blocks
369
Operation The output (Q1) is 1 if the set input (S) is 1 and the reset input (R1) is 0. The output will
retain the previous output state if the set input (S) and the reset input (R1) are 0. The
output is 0 if the reset input is 1.
Truth table:
Inputs Set input (S): Boolean
Reset input (R1): Boolean
Outputs Output (Q1): Boolean
RTRIG
(10031)
Illustration
Execution time 0.38 µs
Operation The output (Q) is set to 1 when the clock input (CLK) changes from 0 to 1. The output is
set back to 0 with the next execution of the block. Otherwise the output is 0.
Note: The output (Q) is 1 after the first execution of the block after cold restart when the
clock input (CLK) is 1. Otherwise the output is always 0 when the clock input is 1.
Inputs Clock input (CLK): Boolean
Outputs Output (Q): Boolean
S R1 Q1
previous
Q1
0 0 0 0
0 0 1 1
0 1 0 0
0 1 1 0
1 0 0 1
1 0 1 1
1 1 0 0
1 1 1 0
Q
previous
is the previous cycle output value.
RTRIG
47
TLA1 1 msec (1)
>CLK
Q
Q(47)
CLK
previous
CLK Q
0 0 0
0 1 1
1 0 0
1 1 0
CLK
previous
is the previous cycle output value.