HIMax System 3 Product Description
HI 801 001 E Rev. 4.01 Page 35 of 122
HIMA recommends to use variant 3 even if variant 1 would be possible. In doing so, the
processor module can be replaced without interrupting operation.
Since the operating system is designed to ensure maximum availability, other combinations
are possible, but not recommended. This allows HIMax to offer more flexibility, e.g., when
replacing modules or modifying the system. However, after such measures have been
completed, the system should be structured such that it corresponds to one of the
recommended variants noted in
Table 10.
3.4 Processor module
The CPU operating system controls the user programs running in a processor module.
3.4.1 Operating System
Tasks:
Controlling the cyclic run of the user programs
Performing the self-tests of the module
Controlling safety-related communication via safeethernet
Managing redundancy together with other processor modules
General Cycle Sequence
Phases:
1. Reading of input data
2. Processing the user program,
3. Writing of output data
4. Other activities, e.g., reload processing
Operating System States
States that can be recognized by the user:
LOCKED
STOP/VALID CONFIGURATION
STOP/INVALID CONFIGURATION
STOP/OS_DOWNLOAD
RUN
RUN/UP STOP
Use the LEDs on the module to recognize the operating state. To this end, multiple LEDs
must be taken into account. Refer to Chapter
7.1 for more information.
Table 11 gives an overview of the operating system states and conditions under which they
are adopted.
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