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7.3. RS-232C Communication
7.3.4. Daisy Chain Communication
7.3.4.3. Interfacing
u Connecting data communication lines
l Connect data communication lines sequentially: First connect the output of the RS-232C
terminal with the input of axis 0, and then connect the output of axis 0 with the input of axis 1,
and so forth.
l Connect the output of the final axis with the input of the terminal.
u Connecting data transmission request lines
l Connect data transmission request lines sequentially: First connect the input of the terminal with
the output of axis 0, and then connect the input of axis 0 with the output of axis 1, and so forth.
l Connect the input of the final axis with the output of the terminal.
u Actual connection example
l When NSK's Handy Terminal is in use, connect the lines as shown in Figure 7-55.
l Refer to "2.8.1. CN1: RS-232C Serial Communication Connector" for the specification of CN1.
Figure 7-55: Handy Terminal connection example
Connector pin No.
8
+5V
1
RXD
3
TXD
7
CTS
2
RTS
5
DSR
4
DTR
6
GND
Driver Unit
#0
* The communication signals of the Handy Terminal are opposite to those of the Driver
Unit (e.g. RXD-TXD).
Driver Unit
#1
— 7-68 —
B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
2
3
t
y
p
e
2
5
t
y
p
e
2
3
t
y
p
e
2
5
t
y
p
e
Driver Unit
#2
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