Siemens SINUMERIK 840Di Function Manual page 1082

Detailed description
2.12 Block descriptions
SpindleHold :=
CALL FC 10 (
END_ORGANIZATION_BLOCK
2.12.12 FC 3: GP_PRAL Basic program, interrupt controlled section
Description of functions
Block synchronized transfers from the NCK to the PLC (auxiliary and G functions) are carried
out in the interruptdriven part of the basic program. Auxiliary functions are subdivided into
normal and highspeed auxiliary functions. The highspeed functions of an NC block are
buffered and the transfer acknowledged to the NC. These are passed to the application
interface at the start of the next OB1 cycle. Normal auxiliary functions are only
acknowledged when they have existed for the duration of one cycle. This allows the
application to issue a read disable to the NC.
Highspeed auxiliary functions programmed immediately one after the other, are not lost for
the user program. This is ensured by a mechanism in the basic program.
The G functions are evaluated immediately and passed to the application interface.
2-170
db2.dbx151.0)
;
ToUserIF := TRUE,
Ack := I6.1);
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
//modal
//Spindle stop modal
//in message
DB
//Error and operational
messages
//Signals transferred from
DB2
//to interface
//Acknowledgment of error
messages
//via I 6.1
Power Line Basic PLC Program (P3)