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Principle
The Premium Warm Standby redundant architecture combines physical redundancy
of the PLC with Normal/Backup type operation.
Only the Normal PLC processes the application and generates the outputs. The
Backup PLC applies the outputs generated by the Normal PLC, performs
self-diagnostics and continuously diagnoses the Normal PLC.
If the Normal PLC fails, the Backup PLC takes control and becomes the Normal PLC
(
the faulty PLC, previously the Normal PLC, then becomes the Backup PLC).
Optimum availability of the application is ensured by:
b
Automatic or user-initiated Normal/Backup changeover
b
A smooth changeover on the actuators
b
Updating of the Backup PLC each cycle
b
Signalling of the faulty component
b
Online repair
b
Transparent supervision (SCADA)
The
redundant components
are:
b
The main rack
b
The main rack power supply
b
The processor
b
Possibly accompanied by:
b
Discrete input modules
b
Discrete output modules
b
One or more extendable racks with their power supplies
b
One or more Ethernet Modbus/TCP network or Modbus link communication modules
The components on the Fipio bus shared
between the Normal and Backup PLCs are:
b
Discrete or analog input modules (Modicon STB or Momentum)
(1)
b
Discrete or analog output modules (Modicon STB or Momentum)
(1)
b
One or more TSX Micro/Premium PLC agents (these can support the entire range
of discrete, analog or application-specific I/O)
(1)
The old range of TBX distributed I/O is also supported.
1 2
3 4 5
6
7
TSX Micro
Premium
Fipio bus
Momentum
Modicon STB
Modbus link
Ethernet Modbus/TCP network
Principle
Essential redundant components
1
TSX PSY
ppp
0
M
power supply
2
TSX P57 353AM
/
453
AM
processor
3
TSX ETY 110WS
Ethernet Modbus/TCP communication
module
Optional redundant components
4
TSX ETY 210
Ethernet Modbus/TCP communication module
5
TSX SCY 21601
communication module with
TSX SCP 114
Modbus protocol PCMCIA card
6
TSX PSY
ppp
0
M
power supply
7
TSX D
p
Y
discrete I/O modules
Shared components on the Fipio bus
Modicon Premium automation
platform
Warm Standby system
PL7 Pro software
2
1
3
4
5
6
7
8
9
10