Ditel DN109/NB Manuel Technique page 173

TECHNICAL MANUAL
LARGE DISPLAYS DN109/NB - DN119/NB - DN189/NB
CHAPTER 24
Register Writing
The different registers of the display allow interaction in different ways, depending on the
address to which it is written, the following registers are distinguished:
•
Register 02: Send numerical value WORD type with sign.
•
Register 06: Send numerical value WORD type without sign.
•
Register 10: Send numerical value double WORD type with sign.
•
Register 14: Send numerical value double WORD type without sign.
•
Register 00: Send ASCII character strings, able to be displayed in 7 segments digits.
All possibilities are detailed below:
24.2.2.1 Register 02.
It is used to send numeric values of type WORD with sign. The range of values is from -
32768 to 32767, inclusive.
You have to send 2,3 or 4 bytes of information, with the starting address being 2.
The first two bytes indicate the value to display (in two's complement). The following
modify the color and/or brightness of the display.
Color values:
•
•
•
•
Finally, the luminosity is established by writing in the fourth byte a value between 30h and
34h (minimum 30h – maximum 34h).
Table 65: Summary of the values for registers 02 and 03.
*
For monochrome displays the color selection byte can be used to manage flicker. Typing 08h starts the
flashing, 09h ends it.
Example:
To easy the sending of information, the
To display the value "-3270" the following content must be sent via Modbus:
ETHERNET COMMUNICATION
Red: Third byte 30h.
Green: Third byte 31h.
Yellow: Third byte 32h.
Orange: Third byte 33h.
REGISTER 02
Byte 1 Byte 2
<XXh> <XXh>
Numerical Value
REGISTER 02
Byte 1 Byte 2
F3h 3Ah
Numerical Value
Table 66: Example of the values to display "3270".
REGISTER 03
Byte 3 Byte 4
<XXh> <XXh>
Color Luminosity*
function Modbus 10h is used.
REGISTER 03
Byte 3 Byte 4
30h 34h
Color Luminosity*
24-9