8 What you need to know about SmartWire-DT
8.3 SWD cycle time
SmartWire-DT Gateway EU5C-SWD-EIP-MODTCP 08/17 MN120003Z EN www.eaton.com 87
Figure 38: SWD cycle time based on the amount of transmitted payload data bytes
a 125 kBit/s: 1 SmartWire-DT module with n user data bytes
b 125 kBit/s: 99 SmartWire-DT module with n user data bytes
c 250 kBit/s: 1 SmartWire-DT module with n user data bytes
d 250 kBit/s: 99 SmartWire-DT module with n user data bytes
When the baud rate doubles, the SWD cycle time is cut in half. In the exam-
ple above, the SWD cycle time goes from 4,224 ms at 125 kbit/s to 2.112 ms
at 250 kbit/s.
12
20
28
36
44
52
60
68
76
84
10
18
26
34
42
50
58
66
74
82
0
10
20
30
40
50
60
70
80
90
100 200 300 400 500 600 700 800 900 1000
n [Bytes]
tp [ms]
②
①
42
41
38
37
34
33
30
29
26
25
22
21
18
17
14
13
10
9
6
5
④
③