Siemens ET8 Series Instrukcje Operacyjne Pobierz pdf (Strona 21)

Additional Information CLV61x Dual Port (PROFINET IO)

5.1.5 Example 2, receipt of a blocked telegram (HS mode):

Input: 16 bytes, output: 16 bytes, data telegram "CLV6xx-12345" with up to 12 bytes  divided into 2 blocks

This can be done by triggering the CLV61x Dual Port, e.g. via the hardware. Only data can then be received by the PLC.

Time: 1 2/3 4

Remarks:

Time 1: The first data block "CLV6xx-1234" (the first 11 bytes) has been received and the PLC shows

ReceiveCount = 1. The ReceiveLength is 12 bytes.

Time 2: The PLC has detected the data and because it has noted that 12 bytes do not fit in the input range,

it knows that at least one more block follows. It confirms the first block by copying ReceiveCount to

ReceiveCountBack.

Time 3: The CLV61x Dual Port sends the next block "5" (just 1 byte is left) to the PLC with ReceiveCount = 2 and

ReceiveLength = 1.

Time 4: The PLC has detected the next block and confirms it by copying from ReceiveCount to

ReceiveCountBack. Transmission of the entire telegram has been completed.

The transportable data volume depends on the input range selected.

Input size minus 5  Input block size

The max. length of a data telegram is 4000 bytes divided into several blocks.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 51 52

Brak uwag

Siemens ET8 Series Instrukcje Operacyjne Strona 21