Prosoft-technology 5205-DFNT-PDPS Manual do Utilizador descarregar pdf (Página 20)

PDPS ♦ ProLinx Gateway Functional Overview

PROFIBUS DP Slave

Page 20 of 61 ProSoft Technology, Inc.

December 31, 2008

2.5.1 Mailbox From PLC to Gateway

Start Byte End Byte Description

0 0 Block number of data in block

1 1 Block number of data requested

2 198 Data for block

199 199 Block number of data in block

2.5.2 Mailbox From Gateway to PLC

Start Byte End Byte Description

0 0 Block number of data in block

1 1 Block number last requested by PLC

2 198 Data for block

199 199 Block number of data in block

2.5.3 Example Raw Database Exchange

Start Byte End Byte Description

0 0 150 (Raw data write)

1 1 160 (Raw data read)

2 3 Start register in database for write

4 5 Number of registers to write (1 to 94)

6 7 Start register in database for read

8 9 Number of registers to read (1 to 96)

10 197 Words to write to the database

198 198 Reserved

199 199 150 (Raw data write)

2.5.4 Example Response Block From GW

Start Byte End Byte Description

0 0 160 (Raw data read)

1 1 150 (Raw data write)

2 3 Start register in database for read

4 5 Number of registers to read (1 to 96)

6 197 Words read from the database

198 198 Reserved

199 199 160 (Raw data read)

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Prosoft-technology 5205-DFNT-PDPS Manual do Utilizador Página 20