Siemens Sitrans LR250 Instruction Manual page 145

Condensed Status (UNCERTAIN) (cont'd)
Hex Status –
value UNCERTAIN
UNCERTAIN – simu-
0x73
lated value, start
0x74 UNCERTAIN – simu-
...0x77 lated value, end
a)
Acyclic Extended Diagnostics (General Fault Codes)
See
7ML19985JF02 SITRANS LR250 (PROFIBUS PA) – INSTRUCTION MANUAL
Description
Indicates the start of a simulation.
Simulation of a measured value or Input FB mode
changes from AUTO to MAN.
• This status remains active for at least 10 seconds:
– after enabling simulation
– after setting the FB to MAN mode
– after a restart (e.g. power down cycle) if the simu-
lation is enabled or the FB is in MAN mode
– after passivation is cleared if simulation is
enabled or the FB is in MAN mode
• In MAN mode the status remains until a subsequent
write command overwrites the OUT value after the
10 seconds have expired.
• In simulation mode the written status is buffered and
appears in the value flow after 10 seconds. However
the new written SIMULATE parameter with its status
can be read before the 10 seconds have expired.
Indicates the end of a simulation.
Simulation of a measured value is disabled or Input FB
mode changes from MAN to AUTO.
This Status remains active for 10 seconds after simula-
tion ends.
While this status is active there is no reliable process
value. Measured values and their status are updated
afterwards.
on page 143.
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