Systemsoftware
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System- and communication configuring D7-SYS - SIMADYN D
Edition 03.2001
Error name
Error display
Priority
Communications error
C
High
Task administrator error
E
Hardware failure, monitoring error
b
User-generated error ID
A
No error present
CPU number
Low
Table 2-15
Error priorities for the message display
The flags of the displayed error and the next priority error code is
displayed when the acknowledge button on the CPU module is
depressed, or an acknowledge signal is issued via a service unit. If there
are no errors present, the CPU number is displayed on the 7-segment
display as the lowest priority message. In order to identify that the
displayed error message was the first to occur, it is displayed flashing.
The sequence diagram illustrates the global program sequence of the
system charts. It consists of the three functional components
•
identify acknowledge signal
•
evaluate components, and
•
display.
The acknowledge signal is a pulse which is derived from the pushbutton
status read-in from the ASI function block or as result of a service
intervention at connection ACK000.I (set from 1 to 0). Priority-controlled
error fields and therefore their display are acknowledged using this pulse.
Output of error codes „C“ and „E“ can be suppressed by changing the
ACK050.I connection from 0 to 1.
The components are evaluated using the function blocks SYF1 and
SYF4. The appropriate numbers of the errors fields are documented in
the function block description (refer to the reference manual, SIMADYN D
function block library). An error field can only be acknowledged if an error
was identified for the particular component and this was displayed.
The first error field evaluation determines which error entry was the first
to be identified by the system. The error in the first error field is displayed
flashing on the 7-segment display.
All of the components are evaluated according to their priority one after
the other. The communications error field cannot be acknowledged, as a
software change is required in order to remove this error. When the
system runs-up, the CPU could be subject to a higher loading. Task
administration errors are automatically acknowledged during the system
run-up using a counting logic function.
Resetting the flags
Mode of operation
Identify
acknowledge
Evaluating
components
Evaluating the first
error field
