Parameter assignment and configuration
4.4 Ident instructions
Communications module RF120C with application blocks for S7-1200 and S7-1500
32
Operating Instructions, 07/2013, C79000-G8976-C328-01
Output parameters
●
DONE (Bool)
The job was executed. If the result is positive, this parameter is set.
●
ERROR (Bool)
The job was ended with an error. The error code is indicated in Status.
●
BUSY (Bool)
The job is being executed.
●
STATUS (DWORD)
Display of the error message if the ERROR bit was set.
●
PRESENCE (Bool)
This bit indicates the presence of a transponder. The displayed value is updated each
time the block is called.
●
ENO
Enable output
General sequence when calling function blocks
Case
①
By setting EXECUTE (EXECUTE = 1) the function/instruction is started. If the job was
completed successfully (DONE = 1), you need to reset EXECUTE.
Case
②
EXECUTE is set for only one cycle. As soon as BUSY is set (and DONE is reset), you can
reset EXECUTE again.
Case
③
Handling as in Case 1, however with error output. As soon as ERROR is set, the precise error
code is available in the STATUS output.
Figure 4-5
General sequence when calling function blocks