SMC Networks EX12 SCS Series Operation Manual page 16

○Switch setting
Open the display/switch cover on the top of the SI unit and setup the DIP switches.
Turn off the power supply while setting the switches.
Node address setting
Set the node address for SW1 to 4 as follows.
Node address SW1
0
1
2
3
4
5
6
7
Set the node address so that it does not duplicate the node address of other slaves. If a node address is
duplicated, normal communication will not be established.
16 point slaves consist of two 8 point slaves and are assigned to the same channel, therefore node
addresses other than the set node addresses can be used as follows.
When the set node address is odd: the previous node address can be used.
When the set node address is even: the next node address can be used.
For example, when node address 5 is set to an SI unit with 16 point slaves, the node address 4 must also
be used for the SI unit.
When an 8 point slave is connected in 4 point mode, the PLC recognises that 2 SI units are connected, so
the next node address to the set node address can also be used. If the node address is duplicated with
that of other slaves, area duplication occurs, so the CompoBus/S communication will not be established.
HOLD/CLEAR setting
Set either to maintain the SI unit output condition (HOLD) or to turn off the outputs (CLEAR) when a
communication error occurs.
SW5 is used for this setting.
The default setting is CLEAR.
HOLD/CLEAR setting
CLEAR
HOLD
SW6 should be set to 0 (turned OFF).
SW2 SW3 SW4
0 0 0 0
1 0 0 0
0 1 0 0
1 1 0 0
0 0 1 0
1 0 1 0
0 1 1 0
1 1 1 0
SW5
0
1
0: OFF 1: ON
Node address
8
9
10
11
12
13
14
15
-15-
SW1 SW2 SW3 SW4
0 0 0
1 0 0
0 1 0
1 1 0
0 0 1
1 0 1
0 1 1
1 1 1
0: OFF 1: ON
No.EX※※-OMC0002-C
1
1
1
1
1
1
1
1