Write Display-Line - Siemens SINUMERIK 840Di sl Commissioning Manual

Ethernet communication
7.7 HT 2
7.7.2.3

Write display-line

The writing of a display line covers the following points:
1. Selection of the display lines to be written in the output area: AB m + 1, Bit 1 and Bit 0
2. Writing the data in the output area: AB m + 4 to AB m + 19
3. Setting the write request in the output area: AB m + 1, Bit 7
4. Waiting for the acknowledgement of the write request in the input area: EB n + 5, Bit 7
5. Resetting the write request in the output area: AB m + 1, Bit 7
The user (machine manufacturer) must write a display line in the PLC user program.
Selecting the display-line
The display line in which the data is to be output is selected via the output signals: AB m + 1,
Bit 1 and Bit 0.
AB m + 1, Bit 1
0
0
1
1
Writing the data
A maximum of 16 characters can be output per display line. The characters must be written
in the output area AB m + 4 (outermost right character) to AB m + 19 (left character). The
character set available in HT 2 is given in the following chapter: Character Map (Page 227)
Write request and acknowledgement
The following figure shows the signal chart of a display-line during the writing:
226
AB m + 1, Bit 0
0
1
0
1
Selected display-line
1. Line
2. Line
3. Line
4. Line
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Manual