HIMax System
9 Lifecycle
HI 801 001 E Rev. 4.01
Page 109 of 122
9.2.3
Assigning the Rack ID
The identification number must be assigned to the base plates or modified if already
existing, when assembling or extending the hardware.
The rack ID is stored in the connector board of the system bus module and must be
modified using the system bus module. The system bus module distributes the rack IDs
among the remaining modules on the base plate.
Whether the base plate and its modules are uniquely identified depends on the rack ID. On
that, in turn, depends the identification of the inputs and outputs.
Always set the rack ID using a direct connection of the PADT to the corresponding system
bus module to avoid that the rack ID of other system bus modules can be accidentally
modified.
Observe this procedure since the rack ID is a safety-critical parameter
To assign the rack ID
1. Create the preconditions:
;
Ensure that all modules on the base plate are in STOP (to prevent the modules from
exchanging old rack IDs).
;
Ensure that no connection exist between the PADT and processor.
;
Establish a direct connection between PADT and system bus module.
2. Change the rack ID:
-
Change the rack ID of one system bus module through the direct connection.
-
Also change the rack ID of a second system bus module (if existing) through the
direct connection.
The new rack ID is valid. The configuration is consistent.
NOTE
Controller malfunction due to inconsistent rack IDs!
Since the rack ID is a safety-critical parameter, it may only be changed using the de-
scribed procedure!
9.2.4
Switching Between Line and Network Structure
The HIMax system can only switch between line structure and network structure by
switching the mode of the system bus modules.
9.2.4.1 Switching
to Network Structure
Requirements for switching the system bus mode to network structure:
The base plates are connected with a line structure.
All base plates are connected redundantly
The system is free of faults and properly configured.
The processor modules are in the STOP state.
The PADT is connected to the system through rack 0. A system login was performed.
To switch to network structure
1. First switch system bus A. To do so, perform steps 2 through 3 for the
left
system bus
module of each rack:
2. Set the mode of the system bus module, which is farthest from rack 0, to
Network
.
Farthest means that connection to this rack passes through most of the other racks or
Ethernet segments.
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