CHAPTER 4
OPERATION
4-5
DN-109NP, DN-119NP, DN-129NP and DN-189NP display series
4.4.
Profibus protocol
In this paragraph, the different protocols will be explained, as well as the programmation of the
displays through them. The formats of values of the numbers and characters are written in this manual
are:
When telling about a hexadecimal number, this will be followed by an “h”.
When telling about a decimal number, th
is will be followed by a “d”.
When telling about a binary number, this will be followed by a “b”.
When telling about an ASCII character, this will be explained in the context.
As an example, the X ASCII character can be explained as 58h, 88d or 1011000b, as needed
in the moment. Number 15 ASCII can be seen as 31h 35h, 49d 53d or 110001d 110101d.
4.4.1.
Block structure
4 double words (DW) are sent in each transmission block. Total 16 bytes. The information that
the block must contain is different depending on the type of frame programmed in parameter 2. The
transmission sequence is started with DW1 byte A and ends with DW4 byte P.
DW1
DW2
DW3
DW4
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
4.4.2.
Data type = 0
Display a double integer. (DW). The value to be displayed must be entered in DW1, where A
is the most significant byte.
Block examples for a 4 digits display.
DW1
DW2
DW3
DW4
Display
00h 00h 06h D8h X X
X
X
X
X
X X
X
X
X
X
1
7
5
2
DW1
DW2
DW3
DW4
Display
00h 00h 06h D8h X X
X
X
X
X
X X
X
X
X
X
2
4
6
4.4.3.
Data type = 1
Display a double integer in hexadecimal format. (DW). The value to be displayed must be
entered in DW1, where 0 is the least significant byte.
Block examples for a 4 digits display.
DW1
DW2
DW3
DW4
Display
00h 00h 06h D8h X X
X
X
X
X
X X
X
X
X
X
0
6
D
8
