Yaskawa GPD505 - Manual (Page 7)

2.3 Network Connection
Communication on the network is half-duplex, two-wire RS-485, with communication parameters fixed at
9600 baud, eight data bits, no parity and one start/stop bit. The connection medium is shielded twisted pair
cable.
Network connection is facilitated by a pluggable 4-way Phoenix-style connector, as illustrated in Figure 5.
Particular attention should be given to the polarity of the network connection. Proper communication
cannot be established with these terminals reversed.
S
H
L
D
N
-
R
E
F
N
+
Figure 5. Network Connector
2.3.1 Bus Terminating Resistor
A bus terminating resistor (120
Ω) is available on each option board and can be applied to the bus by setting
the switches of S3 to their ON position.
In a multi-node system, only those nodes at the end of a bus segment should have terminating resistors.
Before applying a terminating resistor as described above, care should be taken to understand the physical
layout of the network and where other resistors might already be applied. An overloaded bus may not
function properly.
2.4 Network Addressing
A drive’s network address is assigned by selecting the proper setting for switch S1, as detailed in Table 1:
TM4028 7/12/2001
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