Siemens SINUMERIK 840Di Function Manual page 510

Detailed Description
2.13 Querying and displaying of output M help functions
2.13.1.2 Programming status query
System variables
System variables are available for status queries of group-specific M help functions.
The M help functions can be queried group-specifically in the part program and via
synchronized actions through the following variables. The prerequisites and conditions
described under "Status display on the operator interface" do apply.
• Value of the collected and output M help functions of the n+1th group:
• Address extension of the collected or output M help function of the n+1th group:
• Display status of the M help function of the n+1th group:
Example
All M help functions of the 1st group are to be saved in the sequence of their output.
id=1 every $AC_AUXFU_M_STATE[0] == 2 do $AC_FIFO[0,0] = $AC_AUXFU_M_VALUE[0]
References
For further information on system variables, please see /PGA1/ List of System Variables.
2-36
INT $AC_AUXFU_M_VALUE[n]
INT $AC_AUXFU_M_EXT[n]
INT $AC_AUXFU_M_STATE[n]
0: Help function not present
1: M help function collected per search run
2: M help function transferred to the PLC
3: M help function transferred to the PLC and transfer acknowledgment executed.
4: M help function managed by the PLC and taken over by the PLC.
5: M help function managed by the PLC and function acknowledgement executed.
Auxiliary Function Output to PLC (H2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0