216
B7AC Interface Units
Section 5-5
Node address setting:
DIP switch 1, pins 1 through 6
Baud rate setting:
DIP switch 1, pins 7 and 8
The settings on DIP switch 2 are communications settings for the individual
B7AC Interface Unit. Refer to
Settings on DIP Switch 2
on page 219 for details
on these settings.
Node Address Settings
The B7AC Interface Unit’s node address is set with pins 1 through 6 of DIP
switch 1. Any node address within the setting range can be used as long as it
isn’t already set on another node.
0: OFF, 1: ON
Note
1.
Refer to
Appendix A Node Address Settings Table
for a complete table of
DIP switch settings.
2.
The Slave won’t be able to participate in communications if the same node
address is used for the Master or another Slave node (node address du-
plication error).
Baud Rate Setting
Pins 7 and 8 of DIP switch 1 are used to set the baud rate as shown in the fol-
lowing table. (These pins are factory-set to OFF.)
Note
1.
Always turn OFF the Slave’s power supply (including the communications
power supply) before changing the baud rate setting.
2.
Set the same baud rate on all of the nodes (Master and Slaves) in the Net-
work. Any Slaves with baud rates different from the Master’s rate won’t be
able to participate in communications. Furthermore, a node with an incor-
rect baud rate setting may cause communications errors between nodes
with correct baud rate settings.
SW1
SW2
1
ON
2 3 4 5 6 7 8
1
ON
2 3 4 5 6 7 8
Node address
setting
Baud rate setting
Reserved (Always OFF.)
B7AC
transmission
delay setting
B7AC communications
error signal setting
DIP switch 1
Pins 1 to 6: Node address setting
Pins 7 to 8: Baud rate setting
DIP switch 2
Pins 1 to 3: B7AC transmission delay
Pins 4 to 5: Reserved (Always OFF)
Pins 6 to 8: B7AC communications error
signal setting
DIP switch setting
Node address
Pin 6
Pin 5
Pin 4
Pin 3
Pin 2
Pin 1
0
0
0
0
0
0
0 (default)
0
0
0
0
0
1
1
0
0
0
0
1
0
2
:
:
:
:
1
1
1
1
0
1
61
1
1
1
1
1
0
62
1
1
1
1
1
1
63
Pin Settings
Baud rate
Pin 7
Pin 8
OFF
OFF
125 kbps
ON
OFF
250 kbps
OFF
ON
500 kbps (default)
ON
ON
Not allowed.
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