CPU module
3-14
Hardware - SIMADYN D
Edition 03.2001
Display
Operating- and error statuses
Display
can be
deleted
with key
sampling time
•
task
backup
if the task is not designated as a high-priority task,
and has to be re-started.
•
no free local buffer
the data buffer is no longer enabled. Task start is
skipped.
software watchdog
if the base sampling time is not processed for four
consecutive times. The basic clock timer is re-
initialized with the configured base sampling time and
processing is continued.
H
Fatal system error:
hardware or software problem which caused a program
crash:
Display:
•
flashing „H“: Fault/error on this module
•
steady „H“: Fault/error on another module
no
Additional information
on diagnostics refer to the Manual "SIMADYN D Basis Software for
D7-SYS
The button has 2 functions:
•
Deleting the error display:
By depressing button S1, sporadic errors ("E") or non-critical errors ("B")
appearing in the display can be deleted.
If another error is present, this is displayed after the first has been
acknowledged.
•
Binary signal input with function block ASI
Resolution 0.1 ms; e.g. to time stamp messages;
An MM3 coupling memory module must be used as time source if the time is
to be backed-up during power failures.
A plug-in socket for a 28-pin EPLD device is provided on the module
(ALTERA company) so that the user program can be copy-protected
(„Hardlock-PAL“).
Using a special function block, this EPLD device can be checked and the
program stopped if the code is missing or is incorrect.
Additional information on request.
Button S1
Real-time clock
Software
protection
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