CHAPTER 4
OPERATION
4-4
DT-203P, DT-105P and DT-110P display series
4.4
Internal working order
Although it is not necessary to know how the internal working order operates, it is interesting
to know its composition and structure in order to know better how to work with it.
DT-105P, DT-110P and DT-203P displays can store up to 512 messages, with a maximum
length of 160 characters per message. The sum of all the characters of all messages cannot be more
than 32000 characters.
Every message is composed by two blocks:
*Message number -It takes two characters. It is the number to be used to call the message
from PLC
*Printing message code- It takes one character. Not used now.
*Message characters- It takes one character.
*Control orders - It takes two or more characters.
They indicate the special functions which the message must do when they are displayed. The
orders used are:
- Number of line- It takes three characters.
- Start of characters in flashing - From this code on all the characters are displayed in
flashing mode to the end of the message or until ending of flashing code is used (It takes two
characters).
- End of characters in flashing- From this code on the characters are not in flashing method
anymore.
External variable. It saves one character from the text to enter an external variable (it takes
two characters). In message memory one external variable takes two characters. However, the
following variables of this message, if they are correlative, take only one variable.
Example: Message Nº 15, Pieces: xxxx Errors: xxx
Ext.
Var 0
(2c)
Ext.
Var 1
(1c)
Ext.
Var 2
(1c)
Ext.
Var 3
(1c)
Ext.
Var 4
(2c)
Ext.
Var 5
(1c)
Ext.
Var 6
(1c)
Nº of message Pieces =
4
6
9
1
Errors =
1
5
3
- Internal variable. Hour: Minutes. It saves 5 characters from the text. When the display
shows this variable, it sets automatically the present time in Hour: Minutes format (It takes two
characters).
- Internal variable. Hour: Minutes: Seconds. It saves 8 characters from the text. When the
display shows this variable, it sets automatically the present time in Hour: Minutes: Seconds format (It
takes two characters).
- Nº of message internal variable. It adds the message number to the text. It saves three
characters (It takes two characters).
- Message lasting time. It does not save any characters from the text. It is the time of period
that the message last. Once the lasting time of the message is programmed, this value is not changed
until another message, which is programmed with message lasting time order, is operated (It takes 4
characters).
