CHAPTER 5
PROTOCOL AND OPERATIONAL WORK
5-12
Displays for series DT-203NN, DT-105NN and DT-110NN
Text displated:
Message 2 L1
Message 2 L2
Show message number 0004:
Text displayed:
Message 5 L1
Message 5 L2
If you want to leave a blank line in a multiline display, you must write the space character
in that line, because if a line does not write any character, the previous message is
maintained.
5.2.2
Control by direct message
In this mode the whole message will be sent by Profinet network, including the special
commands: line break, flashing, brightness control, etc.
To work in this mode, follow the next steps:
1. Display parameters configuration
Enter to parameter configuration using the display keys and adjust the following parameters:
CONFIG
: 002
PROTOCOL
: PROFINET
2. Send the character string through the Profinet network.
The lenght of the data will be as long as characters have the message and lines you want
to visualize. The data block is sent as a s string of characters, starting at the first available
output address of the PLC that corresponds to the first character on the first display line. If the
number of caracters sent is greater than the number of characters on the display, the message
will be showed in the Dynamic representation mode, scrolling right to left to show the whole
message. (See section 4.2.3.7 to adjust the scrolling speed).
Using the special commands, like “line feed” we can redirect sections of the message to
other lines (in multiline displays)
Depending on the number of lines and characters of the display, a larger or smaller buffer
size will be reserved. Generally, for displays up to 3 lines, the length of the buffer is
dimensioned following the rule:
(number of characters x 2) x number of rows.
To avoid
reserving an excessive range of addresses in the PLC, this rule can vary in displays of more
than 3 rows and 20 characters. To determine exactly the buffer size assigned in a display, we
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