Siemens SINUMERIK 840D sl Function Manual page 1185

Note
In DB2, a "1" signal must be present for several OB1 cycles to ensure that a message can
also be displayed on the operator interface.
Declaration of the function
STL representation
FUNCTION FC 10:
VAR_INPUT
END_VAR
END_FUNCTION
Description of formal parameters
The table below lists all formal parameters of the AL-MSG function.
Signal
ToUserIF
Ack
Call example
CALL FC 10 (
Basic logic functions: PLC Basic program powerline (P3 pl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
VOID
// NAME: AL_MSG
ToUserIF : BOOL ;
Ack : BOOL ;
I/O Type
I BOOL
I BOOL
ToUserIF := TRUE,
Ack := I6.1);
Value range Remark
1 = Transfer signals to user interface
every cycle
1 = Acknowledge error messages.
//Error and operational messages
//Signals from DB 2 are transferred to
//interface
//Acknowledging the error message is done via
//Input E6.1
Detailed description
2.12 Block descriptions
201