Siemens EF 83H Series Manual de usuario descargar pdf (Pagina 57)

Communication Services

4-6

SIMATIC 505 PROFIBUS-FMS CP User Manual

Overview (continued)

4. The

programmable logic controller recognizes the WX bit transition to

1, and then resets the WY bit to 0.

The FMS CP module completes the job, stores the job status in

programmable logic controller V

-memory

, and, when it sees WY bit

reset to 0, resets the WX bit to 0.

The programmable logic controller sees WX return to 0, indicating that

the job is complete. It can check the status word for errors: if none, the

programmable logic controller knows that the data was sent/received

successfully.

The programmable logic controller can start the job again, whenever it

is ready

, by repeating the sequence from Step 2.

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 186 187

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Siemens EF 83H Series Manual de usuario Pagina 57