Ring topology with network redundancy in draw-out systems
•
• Stable communication even if two or more drawers are withdrawn.
The right figure below shows the situation where devices have integrated Ethernet and two drawers are withdrawn. Devices
between these two drawers cannot be reached anymore. Moreover, the MRP redundancy function will not work in this
situation.
in the cable compartment where the switch and other central equipment are installed. The Ethernet cable is not connected
Therefore, no special measures are required in the event that one or more drawers are withdrawn.
A removed drawer cannot disturb the Ethernet communication in any way.
Twisted Pair Ethenet
FBP Connection cable
Devices not
reachable
Network Switch /
MRP Manager
PLC / DCS
MTQ22
UMC
MTQ22
MTQ22
Withdrawn
Drawer
Withdrawn
Drawer
ABB solution with MTQ22-FBP
No problems with drawers missing.
Third party device with Ethernet inside the drawer
Problems arise with multiple drawers withdrawn!
Drawer
All devices
reachable
Cable compartment
Network Switch /
MRP Manager
PLC / DCS
Device with
integrated
Ethernet
Withdrawn
Drawer
Withdrawn
Drawer
Drawer
Cable compartment
Drawers
Drawers
—
12 UNIVERSAL MOTOR CONTROLLER UMC100.3 | MTQ22-FBP.0 MODBUS TCP MANUAL
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