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22 SM8000 Series Preparation for Use
SETTING THE LOGICAL ADDRESS
The logical address of the SMIP II is set by two rotary switches located on the top edge of the
interface card, near the backplane connectors. Each switch is labeled with positions 0 through F.
The switch closer to the front panel of the module is the least significant bit (LSB or “Front”),
and the switch located towards the back of the module is the most significant bit (MSB or
“Back”). To set the Logical Address (LA), simply rotate the pointer to the desired value. For
example, to set the LA to 25, first convert the decimal number to the hexadecimal value of 19.
Next, set the back switch to 1, and the front switch to 9. Two examples are provided below:
Example 1
LA
(decimal)
Divide
by 16
MSB LSB
25 25 / 16 = 1 w/ 9 remaining Divide the decimal value by 16 to get
the MSB and the LSB.
= 0001 1001 The 1 is the MSB, and the remainder of
9 is the LSB.
= 1 9 Convert to hexadecimal. Set the back
switch to 1 and the front switch to 9.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
BACK FRONT
F
IGURE 2-1: LOGICAL ADDRESS EXAMPLE 1