7. Maintenance
354
Right - clicking on the module and selecting “Diagnostic”, the Diagnostic Explorer is opened,
directing for the module status page
Diagnostics via Variables
The Nexto Series CPUs have many variables for diagnostic indication. There are data structures with
the diagnostics of all modules declared on the bus, mapped on the variables of direct representation
%Q, and defined symbolically through the AT directive, in the GVL Diagnostics created
automatically by the MasterTool IEC XE.
Table 7-5 summarizes the diagnostic byte/words division:
CPU summarized diagnostics.
CPU detailed diagnostics (NX3004, NX3005 and NX3010).
CPU detailed diagnostics (NX3020 and NX3030).
Table 7-5. CPU Diagnostics Division
Summarized Diagnostics
Table 7-6 shows the meaning of each CPU summarized diagnostic bit:
Direct Representation
Variable
DG_Modulo.tSummarized.
* AT Variable
There is no active diagnostic.
TRUE – There is a configuration
problem in the bus, as the module
inserted in the wrong position.
FALSE – The bus is configured
correctly.
TRUE – One or more declared
modules are absent.
FALSE – All declared modules were
detected in the bus.
TRUE – TRUE – There are changed
modules in the bus.
FALSE – There are no changed
modules in the bus.
TRUE – One or more modules in the
bus were not declared in the
configuration.
FALSE – All modules were declared.
TRUE – One or more modules in the
bus are with active diagnostic.
FALSE – There is no active diagnostic
in the modules in the bus.
TRUE – One or more modules in the
bus are in fatal error.
FALSE – all modules are working
properly.
TRUE – One or more modules in the
bus have parameterization error.
FALSE – All modules are
parameterized.
TRUE – Master indication there is
failure in the WHSB bus.
FALSE – The WHSB bus is working
properly.
TRUE – CPU hardware failure.
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