Plc - Hms Anybus - Wsb Data Exchange; Figure 13: Data Exchange Principle - Siemens S7-1200 Manual

Siemens S7-1200 interfacing via HMS Anybus Gateway
to Maguire 12-12 Weigh Scale Blender
V1.00

PLC - HMS Anybus - WSB Data Exchange

Figure 13: Data Exchange Principle

The gateway holds the Maguire MLAN commands, there are a number of commands embedded in
the gateway. Some are cyclic commands, commands that are sent at regular intervals, which read
information from the WSB that is then, in turn, copied in to DB300. The other commands are
triggered by events in the PLC or HMI, Data to be sent to the WSB like component settings are sent
from the PLC to the write area of the gateway and are triggered by incrementing a trigger address
also held and handed to the write are of the gateway from DB301. Later in this document we will
break down a command in to its component parts to show how the gateway handles the data and
command structure.
Ref: S7-1200-12-12-WSB Berkshire Systemic Solutions Ltd Page 12 of 44
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