Cooper SMP 4 - Introducing the SMP Gateway in the Automation System; Figure 1 Master and Slave Systems; Figure 2 the SMP Gateway as a Master-And-Slave System

8 • SMP Gateway User Manual
SCADA
DEVICE
MASTER
SLAVE
Figure 1 Master and slave systems
2.1.2 Introducing the SMP Gateway in the Automation System
When an SMP Gateway is introduced in the automation system, it has to act as both a slave and a
master. The SCADA system interrogates the gateway as if it were a substation device. The
gateway is thus a slave to the SCADA. However, since the gateway is connected to the substation
devices, it must also be able to perform the functions of a master, such as polling for data and
sending control requests.
SCADA
DEVICE
MASTER
SLAVE
MASTER
SLAVE
Figure 2 The SMP Gateway as a Master-and-slave system