Ditel DN1 9/NB Series, Technical Manual

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TECHNICAL MANUAL
LARGE DISPLAYS DN109/NB - DN119/NB - DN189/NB - DN129/NB
CHAPTER 24 ETHERNET COMMUNICATION 24-9
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:
•
Red : Third byte 30h.
•
Green : Third byte 31h.
•
Yellow : Third byte 32h.
•
Orange : Third byte 33h.
Finally, the luminosity is established by writing in the fourth byte a value between 30h and
34h (minimum 30h
– maximum 34h).
REGISTER 02 REGISTER 03
Byte 1 Byte 2 Byte 3 Byte 4
<XXh> <XXh> <XXh> <XXh>
Numerical Value Color Luminosity*
Table 67: 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 function Modbus 10h is used.
To display the value " -3270 " the following content must be sent via Modbus:
REGISTER 02 REGISTER 03
Byte 1 Byte 2 Byte 3 Byte 4
F3h 3Ah 30h 34h
Numerical Value Color Luminosity*
Table 68: Example of the values to display " 3270 ".