Siemens SIMADYN D FM 458, User Manual

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Product description
2-8
Application Module FM 458 - User Manual
6DD1904-0AE0 Edition 12.2001
2.1.5 Status displays
There are eight LED displays on the front panel of the FM 458. They
provide information about its actual operating status and data for
diagnostics.
LED Color Status Significance
INTF red lit Internal error , user program is not running
IF red lit
Initialization error
For errors, which occur when initializing the system, the user program
doesn't start. Initialization errors due to incorrect modules or modules
which are incorrectly inserted with respect to how they were originally
configured.
UF yellow lit User error
The user program runs, user-defined diagnostics event with the
function block USF
MF yellow lit Monitoring error
User program runs, low-priority error during initialization which permits
standard operation to start, e.g. missing or discharged buffer battery.
CF yellow lit
Communications error
User program runs, erroneous configured communications or
erroneous connection to SIMATIC S7 or EMX 448
TF yellow lit Task administration error
User program runs, the following error cases are possible:
Cycle error
a task was not able to be completed within the task sampling time.
Task back-up
If the task is not marked as a task to run with the highest priority, and
it must be restarted.
No free local buffer
The data buffer is no longer enabled. Task start is bypassed.
Software Watchdog
if the basic sampling time is not processed four times one after the
other. The basic clock cycle timer is re-initialized with the configured
basic sampling time and processing continued.
RUN green lit RUN condition
User program runs, the module operates normally also if UF, MF, CF
or TF = "lit“
flashing
Initialization running
STOP yellow lit STOP status
User program is not running, module is in the stop condition, e.g. or
fatal system-, initialization errors or the
S7-CPU is in the stop condition.
flashing Download running in the STOP condition (is faster than the download
in the run condition, which runs in the background)
Table 2-5 Significance of the LED status displays