Siemens Moore 353 - TSW_ - Transfer Switch; XOR_ - Exclusive or Logic

Function Blocks UM353-1
March 2003
3-102
3.2.101 TSW_ - Transfer Switch
TSW_ function blocks select one of two analog input
signals as the output signal. Input A becomes the output
when input SC is low (0) and input B will be the output
when input SC goes high (1).
Unconfigured inputs will default to SC=low(0), A=0.0,
B=100.0.
BLOCK DIAGRAM
A
O1
SC
B
O
utput
1
Input
A
Input
B
S
witch
C
ommand
X03135S0
3.2.102 XOR_ - Exclusive OR Logic
XOR_ function blocks perform a logical exclusive OR
function on all three inputs. An unused input will cause the
block to function as a two input XOR. The XOR output
will be low (0) when all configured inputs are low (0) or
when all configured inputs are high (1).
A
O1
B
C
XOR
XOR TRUTH TABLE
AB
C
O
utput
1
000
00
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
1
1
1
X03136S0
Input
A
TRANSFER SWITCH
O1
O
utput
1
TRANSFER SWITCH
TSW_
ESN =
000
A
ESN
E
xec.
S
eq.
N
o.
(H)
................. 001 to 250
C
TU
P
N
I
INPUT B
(H)
..........
loop tag.block tag.output (null)
S
witch
C
ommand
SC
B
TU
P
N
I
INPUT SC
(H)
........
loop tag.block tag.output (null)
Input
B
B
S
A
TU
P
N
I
INPUT A
(H)
..........
loop tag.block tag.output (null)
Input
A
XOR
O1
O
utput
1
XOR
XOR_
ESN =
000
A
ESN
E
xec.
S
eq.
N
o.
(H)
................. 001 to 250
C
TU
P
N
I
INPUT B
(H)
..........
loop tag.block tag.output (null)
Input
B
B
B
TU
P
N
I
INPUT C
(H)
..........
loop tag.block tag.output (null)
Input
C
C
A
TU
P
N
I
INPUT A
(H)
..........
loop tag.block tag.output (null)
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