PLX3x Series ♦ Multi-Protocol Gateways
SIE Protocol
User Manual
ProSoft Technology, Inc.
Page 169 of 215
January 25, 2018
Example:
Sending an integer value of 11733 from gateway register 1000 to a Siemens S7-
300 processor demonstrates the addressing scheme in the Siemens S7-300
processor. The following image from
ProSoft Configuration Builder
shows a client
command sent from the gateway to INT data to DB1 address 0.
Row 1 in the SIMATICS Manager screen (below) shows the data transferred
from the gateway
If the data is broken up and displayed in binary format, you can see that the
binary data stored in the first byte of DB1.DBW0 is identical to that stored in byte
address DB1.DBB 0. This is because the memory locations referenced by the
first byte of DB1.DBW 0 and by DB1.DBB0 are one and the same, as explained
above.
The first byte of DB1.DBW0 is the same as DB1.DBB0.
