Specifications

4-6 OPERATION CHAPTER 4
DT-203X, DT-105X and DT-110X display series
4.4.1.3. Number of bytes.
1 byte.
Is the number of bytes which forms the block of information. It begins to count from the
byte of the address number to the second byte of CRC, both included. The value of the number
of bytes must be, in hexadecimal type, between 6h and 250h.
4.4.1.4. Data.
The Data consists of the message texts, the control characters and the error codes. The
area of data must be started by some control characters, which will define the kind of
information which follows.
4.4.1.5. End of data
2 bytes.
It is always “00h 0Dh”.
4.4.1.6. CRC
2 bytes.
Check redundancy code. The first byte is the result of calculating the OR EXCLUSIVE
function of odd bytes. It begins from the terminal number to end of data, both included. The
second byte is the result of calculating the OR EXCLUSIVE function of even bytes. It begins
from the number of bytes to end of data, both included.
4.4.1.7. End of block.
Always “00h 03h”.
4.4.1.8. Data field structure
4.4.1.8.1. Displaying a message. (ONE LINE DISPLAY)
The structure of the data field is:
Start block
First line indicator
Message in ASCII characters
00h 1Bh
06h
“MESSAGE
Beginning a message: 2 bytes.
It is “00h 1Bh”. It must be placed at the beginning of the data block.
1st line indicator: 1 byte.
It must always be “06h” in hexadecimal. This information is not useful in these kinds of
displays, but it must be included to maintain the compatibility with the software of other displays.
Text
The text to be displayed must be in ASCII code. There are several options to be taken
within a text:
“00h 08h” beginning of blinking, in the following characters.
“00h 09h” ending of blinking.
“00h 15h” displaying the date, needs 8 characters.
“00h 16h” displaying the hour and minutes. It needs 5 characters
“00h 18h” displaying the hour, minutes and seconds. It needs 8 characters.