Parameterization and Configuration
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TR - ELA - BA - DGB - 0027 - 03
11/12/2019
6.3.2 Parameter access and initialization
Figure 4 shows the parameter database of the measuring system and the mechanism for how the
parameter database obtains its parameter data in the start-up and initialization phase.
Figure 4: Parameter access and initialization (simplified functional representation)
In the default setting the measuring system obtains its parameters from the parameter data block via a
configuration tool, see chapter "Configurable module parameters" from page 117. This means that
parameter changes are only possible by restarting the measuring system.
However, if parameters also need to be changed during operation, parameter access is also possible
after the start-up phase via an acyclic write or read command, see chapter "Acyclic parameter access
(Base Mode Parameter Access - Local) " on page 128. The modified parameters are not permanently
saved, however, and must be stored in the non-volatile RAM area of the measuring system via
parameter
PNU 971
= 1, see page 141.
So that the measuring system also obtains the modified parameters from the non-volatile RAM area at
the next restart, the parameter initialization must be switched to the non-volatile RAM via the
initialization control
PNU 65005
, see page 137.
Access to the initialization control
PNU 65005
can occur either via the parameter data block (if
active) or via the acyclic parameter access, and is thus always configurable independently of the
initialization setting.
