Westermo LD-63 AD - Manual (Page 10)

10 6072-2004
Selection of V or Y function
Y S1
ON
1 2 3 4 5 6 7 8 9
V S1
ON
1 2 3 4 5 6 7 8 9
Selection of retiming function
Retiming S1
ON
1 2 3 4 5 6 7 8 9
Retiming of S1
ON
1 2 3 4 5 6 7 8 9
Selection of bits
9 S1
ON
1 2 3 4 5 6 7 8 9
10 S1
ON
1 2 3 4 5 6 7 8 9
11 S1
ON
1 2 3 4 5 6 7 8 9
* S1
ON
1 2 3 4 5 6 7 8 9
V-function and Y-function are described
on page 11.
*) Use this setting for synchronous
protocols.
The transmitter will be active from the
start bit to 10 bit-times after the last
high databit
(see example below).
The speed shall be set to
≅
10 times
the required communication speed.
The retiming function calculates the exact bit-
length based on the speed set and recreates
the signal. This allows for more units in series.
The retiming works only for the indicated
speeds. For other speeds (e g 1.2 Mbit/s)
retiming can not be used.
Start bit
1 bit = 52µs
1 bit: 1/19 200 = 52µs
Data rate 19 200
Transmitter active
Set the speed to 187.5 kbit/s
10x52µs = 520µs
↵
Example 19 200 bit/s
Retiming
possible
Turning/Transmission/
Number of units connected in serie
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
S1
ON
1 2 3 4 5 6 7 8 9
20
Number*
of units
20
20
20
20
20
20
20
20
15
10
5
20
10
4 S1
ON
1 2 3 4 5 6 7 8 9
Switch settings LD-63
0.4 ms 2 400 bit/s
Turning-
time
Transmission
rate
0.2 ms 4 800 bit/s
0.1 ms 9 600 bit/s
75 µs 14 400 bit/s
50 µs 19 200 bit/s
37 µs 28 800 bit/s
25 µs 38 400 bit/s
16 µs 62 500 bit/s
11 µs 93 750 bit/s
9 µs 115.2 kbit/s
6 µs 187.5 kbit/s
3 µs 375 kbit/s
2 µs 500 kbit/s
1 µs 1.0 Mbit/s
0,7 µs 1.5 Mbit/s
When using RS-232 interface it is not necessary to
select number of bits and transmission rate. The RS-232
interface can handle transmission rates from 0 up to
115.2 kbit/s.
*) For additional units
please contact
Westermo