Programming PLC Functions
4.4 Configuring the display of messages in the header
HMI Advanced (IM4)
120 Commissioning Manual, 03/2009, 6FC5397-0DP10-3BA0
Table 4- 1 User PLC-DB interface
Program path
line
Start DBBx Start-DBWx
+1
Start-DBBx
+ 3
Start-DBBx
+ 4
Start-DBBx
+5-17
Data type Byte Word Byte Byte String
Significance Bit0=1: there is
something to do
All bytes=1: job is
acknowledged by
HMI
All bytes=0: PLC can
write to interface
again
Offset for text to
be displayed
from
alpu_xx.com,
700000 is the
basis address
and is always
added internally
=0: Delete line
Number from 0
...255
(corresponds to
the 1st parameter
%1)
Index from –127 ...128
negative number (-
1=0xFF, -2=0xFE) is
the machine axis index,
the positive number is
the channel axis index.
The index is then
converted to an axis
name before being
displayed.
(corresponds to the
2nd parameter %2)
String containing
a maximum of 12
characters
(corresponds to
the 3rd parameter
%3)
Program
name line
Start-DBBx
+20
Start-DBWx
+21
Start-DBBx
+23
Start-DBBx
+24
Start-DBBx
+25-37
Data type Byte Word Byte Byte String
Significance As above As above As above As above As above
Note
The Start-DBBx may only be supplied for a new job with bit 0 = 1 if all of the bytes after the
previous job were again zero and the parameters for the new job Start-DBBx+1 to
StartDBBx+5 are correctly set.
Special characters that have a special meaning within the syntax for this function (", %, $, #)
must not appear within the user's character string (Start DBB+5…).
Start DBBx HMI detects a job and acknowledges it (all bytes=0).
Start DBWx+1 Start DBWx+1 contains the offset for a text number with a base of 700,000
(user PLC texts). If this parameter = 0, the corresponding line is deleted.
Start-DBBx +3 Start DBBx+3 contains a number that is displayed without being converted.
Start-DBBx +4 Start DBBx+4 contains an axis index.
Negative value = machine axis index (AXCONF_MACHAX_NAME_TAB[
Index-1], MD 10000),
Positive value = channel axis index (AXCONF_CHANAX_NAME_TAB[ Index-
1], MD 20080),
These indices always refer to the channel currently displayed in the HMI. The
index is converted to an axis name before being displayed.
Start-DBB +5 Start DBBx +5−17 contains a character string comprising a maximum of 12
characters.
Structure of PLC program
The PLC program must be laid out in such a way that all parameters are initialized before the
first byte is set.
The data for the program name line (second line) are located 20 bytes after the start byte.
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