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Using Rotary Switches to Set Station Address
Use the two rotary switches to configure a unique DPU highway station
address, a number ranging from 32 and 63; the station number is set in
hexadecimal (hex). The upper switch sets the most significant digit of the
address (e.g., 3 for Station 50). The lower switch sets the least significant
digit for the address (e.g., 2 for Station 50).
Hexadecimal
Decimal
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
A
10
B
11
C
12
D
13
E
14
F
15
Two LED Displays
The two seven-segment LED displays report highway status using hex
numbers. During DPU startup, the LEDs display FF. When the DPU
concludes its startup phase, the LEDs alternately display the codes 03, 04,
and 07 to indicate:
(03) query response transfer is in progress
(04) token passing is in progress
(07 the DPU is executing normal background functions
If an error occurs in the DPU, causing it to fail, these LEDs display an error
code. Refer to Chapter 8 for a listing of error codes.
IOM Load
Metso Automation MAX Controls Factory Service use only.
Metso Automation MAX Controls • • • • 277573 • • • •
To convert a two-digit hexadecimal number
to decimal, multiply the first digit by 16 and
add the decimal value of the second digit.
2C hex = 2 * 16 + C
= 32 + 12
= 44
To convert decimal to hexadecimal, divide
the decimal number by 16 until a remainder
of less than 16 is obtained:
50 decimal
= 50÷16 = 3 (hex)
with 2 (2 hex) remainder
= 32 hex
DPU Front Panel
2-3
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