Yaskawa 260IF DeviceNet System - Manual (Page 33)

Network Specifications
3.1.3 Network Configuration Restrictions
3-8
3
Total Drop Line Length
The total drop line length is the total of all drop line lengths. The total drop line length must
be within the allowable range and even then, each drop line must be 6 m or less.
The allowable range of total drop line length varies with the baud rate as shown in the fol-
lowing table.
• Configuration Example
The following example is for a baud rate of 500 Kbps.
The above example must satisfy the following conditions.
Drop lengths:
a 6 m b 6 m c 6 m d 6 m d ＋ f 6 m
d ＋ e ＋ g 6 m d ＋ e ＋ h 6 m
Total drop length ＝ a ＋ b ＋ c ＋ d ＋ e ＋ f ＋ g ＋ h 39 m
Baud Rate (Kbps) Total Branch Length (m)
500 39 max.
250 78 max.
125 156 max.
T T T
T
T
T
a
b c
d
e
f
g h
(with terminating resistance) Terminating resistance
Node Node Node
Node
Node
Node Node
: Trunk line
: Drop line
: T-Branch Adapter
Node
≤ ≤ ≤ ≤ f ≤
≤ ≤
≤