Siemens SINUMERIK 840D sl Function Manual page 1472

Detailed description
2.12 Block descriptions
FB 1-Parameter "ExtendAlMsg"
By activating this parameter a new structuring of the DB 2 becomes effective, see Section
"Detailed description, under interface PLC/HMI". Upon activation the bit fields are available
to the user for the disable and halt signals, which do not generate any alarms, messages. As
a result, the user need not implement the aforesaid measures. The desired functionality is
given automatically bby a simple setting, resetting of signals in the new DB 2 areas.
The error and the operating messages are stored by the user in the data block DB 2, see
/Lists/ (Book2), "Data blocks DB of the PLC user interface".
Note
In DB 2, a "1" signal must be present for several OB1 cycles to ensure that a message can
also be displayed on the HMI. There is an upper limit for the number of interrupts and
messages that can be pending at the same time. This upper limit is dependent on the PLC
CPU. On PLC 317-2DP, the upper limit for messages pending simultaneously is 60.
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 (
198
VOID
// NAME: AL_MSG
ToUserIF : BOOL ;
Ack : BOOL ;
Type Type
I BOOL
I BOOL
ToUserIF := TRUE,
Ack := I6.1);
Range of values Remark
1 = Transfer the signals to user interface
every cycle
1 = Acknowledge error messages.
//Error and operational messages
//Signals from DB 2 are transferred to
//interface
//Acknowledgement of the error message done via
//Input E6.1
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0