Siemens Welding System ST PCS 7 사용자 설명서

 

Siemens ST PCS 7 · Update November 2008

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The equipment of the fault-tolerant automation systems as well 
as their Order Nos. can be individually compiled by selecting 
preconfigured ordering units. System-specific ordering configu-
rations are available for this purpose in the following Section 
"Selection and ordering data". 

These are divided into:

• Single stations: AS 412-3-1H, AS 414-4-1H and AS 417-4-1H 

with only one CPU, e.g. for the following cases: 
- Subsequent expansion to a redundant system 
- Redundant configuration on UR1 racks, comprising 2 Single 

Stations, 4 sync modules and 2 sync fiber-optic cables

• Redundant stations: AS 412-3-2H, AS 414-4-2H and 

AS 417-4-2H with two redundant CPUs, mounted on one com-
mon rack (UR2-H) or two separate racks (UR2)

In order to rapidly access the recommended preferred configu-
rations, these are additionally listed with their complete Order 
Numbers.

As an alternative to the ordering data in this catalog, the 
configurator offered in the catalog & online ordering system 
"A&D Mall" (www.siemens.com/automation/mall) can also be 
used to select and order fault-tolerant automation systems for 
SIMATIC PCS 7. 

Ordering information:

For a redundant configuration based on 2 Single Stations, you 
additionally require 4 sync modules (up to 10 m or 10 km) and 
2 fiber-optic sync cables. Their selection depends on the dis-
tance between the two Single Stations.
The AS 412H (AS 412-3-1H/AS 412-3-2H) automation systems 
currently only support sync modules with a range up to 10 m. 
Fiber-optic sync cables longer than 1 m must always be ordered 
separately (2 of each required).

■

The fault-tolerant automation systems of SIMATIC PCS 7 are 
based on the 1-out-of-2 principle. In the event of a fault, they 
switch over to the standby system. These systems use a com-
pletely redundant design to maximize availability. Therefore all 
important system components are present twice, such as: 

• Central processing unit

• Power supply

• Hardware for linking the two CPUs

Which other components are also made available in pairs in the 
interest of availability depends on the application-specific sys-
tem architecture. 

The two subsystems of a redundant automation system are elec-
trically isolated from one another. This increases the system sta-
bility with respect to electromagnetic interference. 

The firmware of the fault-tolerant automation systems can be up-
dated in two ways:

• Per Flash-EPROM memory card (8 MB)

• From the central engineering system via the Industrial Ether-

net plant bus

© Siemens AG 2008