Specifications

4-16 OPERATION CHAPTER 4
DT-203X, DT-105X and DT-110X display series
Bits D7-D5 = 011 Variable in 2 byte hexadecimal. Displayed in hexadecimal.
Needs 4 variable characters when the message is edited
Example:
Variable sent: 8765h. Value displayed: 8765
Bits D7-D5 =100 Variable in 2 byte hexadecimal. Displayed in decimal.
Needs 5 variable characters when the message is edited
Example:
Variable sent: 8765h. Value displayed: 34661
In Bits D4-D0 must be the number of characters sent.
Dv: Variable data.
The data variable must be sent using the data format selected in byte Nc.
Because the data block must be an even number of bytes, you could use character 00h
to complete the data block.
To send variables data of more than one line you could repeat the structure
Pv
Nc
Dv
as many times as you need.
4.4.2.10. Response block.
After a transmission block is received, a response block is sent with the result.
No error:.
Address
10h
Control
First
Words
High
Words
Low
CRC
Low
CRC
High
Address: The display address
10h: ModBus code. Always 10 in hexadecimal.
Control: Control mode and line number.
First: Position of first character send.
Words high and Words low: Number of words sent into data.
CRC low and CRC high: CRC value.
Error:
Address
90h
Error
Code
CRC
Low
CRC
High
Address: The display address
90h: ModBus error code. Always 90h.
Error code: The valid error codes are:
02h = Crc error.
03h = Data block error.
CRC low and CRC high: CRC value.