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Architectures (continued)
Modicon Premium automation
platform
Hot Standby system
Unity Pro software
Architectures (continued)
SCADA architecture on Modbus and shared I/O on Ethernet Modbus/TCP
1
As in the typical architecture on page 4/54, the Premium Hot Standby system I/O are
shared on an Ethernet Modbus/TCP network (with a bus topology as in the example
below). However, the SCADA interface is connected to the standby system via a
Modbus serial link.
The Ethernet Modbus/TCP network modules no. 4 - M are configured as “monitored”
so that they trigger the Hot Standby changeover in the event of a failure (of the
Ethernet module or the electrical connection and its switch) (see page 4/54).
2
SCADA
Vijeo Citect
Monitor Pro
31
31
34
Modbus
3
Modbus master
33
Primary Premium
2 3
4-M
Standby Premium
8
2 3
4
5
6
7
8
9
8
4-M
1
Redundant components:
1 Non-expandable rack with 6, 8 or 12 positions TSX RKY pp
(single-rack configuration) or expandable with 4, 6, 8 or 12
positions TSX RKY ppEX (multi-rack configuration)
2 Power supply module TSX PSY pppM
3 Hot Standby processor TSX H57 24M/44M
4-M “Monitored” Ethernet Modbus/TCP network module
TSX ETY 4103/5103 (version u sv 4.0)
8 Serial link communication module TSX SCY 21601 on which
the integrated channel cannot be used in this type of
architecture
9 Isolated RS 485 PCMCIA card TSX SCP 114 used in
Modbus slave protocol
Shared components on the Ethernet Modbus/TCP network:
15 Modicon M340 automation platform with processor with
integrated Ethernet port BMXP34 2020/2030
16 Modicon STB modular distributed I/O with network interface
module STB NIP 2212
17 Altivar 61/71 variable speed drive with communication card
VW3 A3 310
18 Optimum Modicon OTB distributed I/O, with interface
module OTB 1E0 DM9LP
19 Magelis XBT GT graphic display terminal with embedded
Ethernet port XBT GT pp30/40
Other possible shared components: (see page 4/54)
Ethernet cabling components:
10 ConneXium unmanaged switch with 5 ports
10BASE-T/100BASE-TX 499 NES 251 00
11 CPU Sync link, copper crossover cable 490 NTC 000 ppp
12 Copper straight-through cable 490 NTW 000 ppp
13 Copper crossover cable 490 NTC 000 ppp
9
Slave
9 Slave
11 CPU Sync link
12
13 Ethernet Modbus/TCP
10
10
19
17
16
15
Modicon M340
18
Modicon STB
4/56
Modicon
OTB
SCADA supervision system
A failure triggers the changeover so that the Standby PLC becomes the Primary PLC
and automatically switches the Modbus addresses, the address of the new Primary
PLC becoming “n” and that of the old Primary PLC becoming “n+1”.
10
Description:
page 4/53
Altivar 61
Magelis XBT GT
In this type of architecture, redundancy of the SCADA station, based on the Vijeo
Citect or Monitor Pro supervision software, is provided by a Modbus serial link on
which the SCADA station is master. The Primary and Standby Premium PLCs via
their TSX SCY 21601 communication module equipped with the TSX SCP 114 RS
485 PCMCIA card have the slave addresses “n” and n+1 respectively.
Modbus cabling components:
31 Passive T-junction box, connection on screw terminals with
line terminator TSX SCA 50
33 Drop cable for PCMCIA card with flying leads at at one end
TSX SCP CM 4030 (3 m long)
34 RS 485 double shielded twisted pair trunk cable TSX CSA
100/200/500 (100, 200 or 500 m long)
Presentation:
page 4/52
12
12
Functions:
pages 4/58 ...
References:
pages 4/60 ...