Siemens S7-400 Manuale di Servizio Pagina 152

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Status Bit Instructions
Ladder Logic (LAD) for S7-300 and S7-400 Programming
12-4
A5E00706949-01
The MUL_I box is activated by signal state "1" at I0.0. The ADD_I box is activated
by logic "1" at I0.1. If the result of one of the math functions was outside the
permissible range for an integer, the OS bit in the status word is set to "1". Q4.0 is
set if the scan of OS is logic "1".
Note
The scan with OS is only necessary because of the two separate networks.
Otherwise it is possible to take the ENO output of the first math function and
connect it with the EN input of the second (cascade arrangement).
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