Siemens SINUMERIK 840D sl Function Manual page 540

Detailed description
2.13 Scan and display of output M-auxiliary functions
2.13 Scan and display of output M-auxiliary functions
2.13.1 Information options
Information methods
Information on the status of M-auxiliary functions is available using:
• Display on the user interface
• Scan of system variables in part program and synchronous actions
2.13.1.1 Status display on the user interface
Operator interface
The output status and acknowledgement status of auxiliary functions can be displayed on
the user interface.
Requirements
To implement function-oriented acknowledgement and display of M-auxiliary functions, the
auxiliary functions must be managed in the PLC and, thus, in the user program itself.
Therefore, it is up to the PLC programmer to program the acknowledgement of these
auxiliary functions. He has to know which auxiliary functions in which group have to be
acknowledged.
Default
M-auxiliary functions that are not managed by means of the PLC are identified by the NC as
output and transferred to the PLC. There is no functional acknowledgement for these
auxiliary functions. All M-auxiliary functions collected after a block search are also displayed
so that the operator knows which auxiliary functions will be output after a start following a
block search.
PLC activities
In the case of auxiliary function groups that are managed by the PLC itself, the PLC user
program must acknowledge all auxiliary functions of this groups when Apply and Function
End are activated. The PLC programmer must know all the auxiliary functions of these
groups.
52
Basic logic functions: Auxiliary Function Output to PLC (H2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0