Siemens Moore 353 - SRF_ - SR Flip-Flop

UM353-1 Function Blocks
March 2003
3-99
3.2.95 SRF_ - SR Flip-Flop
SRF_ function blocks perform a set dominant flip-flop
function as detailed in the truth table. An unused R input
will be set high (1) and an unused S input will be set low
(0).
POWER UP - During a warm start, when PU LAST is set
to YES, the block will initialize at the input/output states
at the instant power down occurred. A cold start will
initialize the input/output states to 0.
3.2.96 SRT_ - Square Root
SRT_ function blocks compute the square root of input
signal A. The input has a built-in low limit that will limit
the signal to the square root computation to 0.0.
BLOCK DIAGRAM
S
O1
R
SR FLIP-FLOP TRUTH TABLE
SRLO O1
1
0
0
0
XX
X
1
1
10
000
0
1
S - SET
Input
R - RESET
Input
O1 - O
utput
LO -
Last
O
utput
O
utput
1
S
et
R
eset
X (don't care)
.
.
BLOCK DIAGRAM
O1
O
utput
1
LO Limit
0.0
A
A
nalog Input
.
.
S
et
SR FLIP-FLOP
O1
O
utput
1
SR FLIP-FLOP
SRF_
ESN =
000
S
E
E
xec.
S
eq.
N
o.
(H)
................. 001 to 250
R
T
U
P
N
I
INPUT R
(H)
..........
loop tag.block tag.output (null)
R
eset
R
S
T
U
P
N
I
SN
INPUT S
(H)
..........
loop tag.block tag.output (null)
LPU TSA
P
ower
U
p
LAST
(S)
.................. NO/YES (YES)
SQUARE ROOT
O1
O
utput
1
SQUARE ROOT
SRT_
ESN =
000
E
S
N
E
xec.
S
eq.
N
o.
(H)
................ 001 to 250
A
INPUT A
(H)
...........
loop tag.block tag.output (null)
ITU
A
nalog Input
A
P
N
StockCheck.com