HIMax System
4 Redundancy
HI 801 001 E Rev. 4.01
Page 47 of 122
4.2.2 Channel
Redundancy
Requirement: Two modules were configured redundant to one another.
Channels with the same number can be defined as redundant to one another.
In such a case, the programming tool automatically assigns a global variable associated
with a channel (channel number) to both channels of the redundant modules. For more
information on the Hardware Editor in SILworX, refer to the online help.
For input channels, users can specify how the controller should compose the signals of
both redundant channels to a resulting value. The global variable adopts this value.
Not all channels of two redundant modules need to be redundant.
4.2.3
Connector Boards for Redundant Modules
In several application cases, all channels of two redundant modules are redundant, but the
connected transmitters or actuators are not.
Additional wiring effort can be saved by proceeding as follows:
Use a connector board that is intended for this purpose and occupies two slots.
Plug the two redundant modules in to adjacent slots.
Field connections must be created on the connector board once only.
Specific connector boards can be also provided for the threefold redundant implementation
of certain I/O modules. In such a case, the user program must manage the redundancy.
For more information on these Connector Boards, refer to the module manuals.
4.3 System
Bus
The HIMax system has two redundant system buses, system bus A and system bus B.
Requirements for redundant operation:
Use of two system bus modules per base plate.
Suitable configuration of the system bus modules.
Connection of the base plates in a controller, see Chapter 3.2.
HIMA recommends using system bus A and system Bus B redundantly even if a non-
redundant operation would be possible, see variant 1 in Chapter 3.3.2.
4.4 Communication
For more information, refer to the online help of SILworX and the Communication Manual
(HI 801 101 E).
4.4.1 safe
ethernet
Redundancy is configured in the SILworX safe
ethernet
Editor. A communication
connection is redundant if two identical physical transmission paths exist.
4.4.2 Standard
Protocols
Modbus
PROFIBUS
If standard protocols are used, the user program must manage redundancy, except for
Modbus slaves.
4.5 Power
Supply
The HIMax system can be operated with redundant power supply units. The power supply
units are connected to the terminal block, with terminals L1+/L1- used for the first power
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