1. PLC:Location in the control architecture
Engineer
station
Operator
station
Supervisor
Station
Enterprise Network
gateway
direct I/O
Field Stations
data concentrators,
not programmable,
but configurable
41
CPU
I/O
COM 2
Sensor Bus (e.g. ASI)
gateway
COM
FB
gateway
small PLC
PLC
Field Bus
COM
CPU
COM
I/O
I/O
I/O
COM
CPU
Field Bus
COM
CPU
I/O
I/O
I/O
I/O
directly connected
I/O
Control Station
with Field Bus
COM1
PLC
CPU
COM1
COM 2
I/O
I/O
I/O
I/O
large
PLCs
CPU
COM1
I/O
I/O
I/O
I/O
I/O
Control Bus
(e.g. Ethernet)
Field Devices