S5-95U, Second Serial Interface
Computer Link with 3964(R) Transmission Protocol
Parity (PRTY)
Five types of parity are available.
Table 3-5 Meanings of the Types of Parity
Default in
DB1:
Parity
Meaning
EVEN
Even parity
The parity bit is set to ensure that the sum of the data bits (including
parity bit) with signal state
”
1
”
is even.
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
X
ODD
Odd parity
The parity bit is set to ensure that the sum of the data bits (including
parity bit) with signal state
”
1
”
is not even.
MARK
The parity always has signal state
”
1
”
.
NONE
No parity check
The signal state of the parity bit is meaningless. Parity is not checked
when the block is received; during sending, however, it is always set
to
”
1
”
.
SPACE The parity always has signal state
”
0
”
.
Data format and character frame (DF)
Characters are transmitted between the S5-95U and the communication partner in either a 10-bit or
11-bit character frame. Within these character frames, you can use either 7 or 8 data bits.
Table 3-6 Character Frames and Sequence of Bits Transmitted in a Computer Link
(Depending on Data Format)
*
cf. Table 3-3
Arguments of the
DB1
”
DF
”
(data format)
Charac-
ter
frame
Parity
E/O/M/S/N
*
1
11 bits
E/O/M/S/N
*
Setting
irrelevant
2
11 bits
Setting
irrelevant
3
10 bits
4
10 bits
0
11 bits
E/O/M/S/N
*
8
as data format 1
E/O/M/S/N
*
11 bits
5
Setting
irrelevant
10 bits
7
as data format 0
E/O/M/S/N
*
11 bits
Default
in DB1:
X
Sequence and Number of Bits on
the Line
Parity
Bit
Stop
Bits
Start
Bit
Data
Bits
1
7
2
1
1
8
1
1
1
8
2
-
1
7
2
-
1
7
1
1
1
8
1
-
1
7
2
1
1
8
1
1
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a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
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EWA 4NEB 812 6095-02
3-13