7ML19985JF02 SITRANS LR250 (PROFIBUS PA) – INSTRUCTION MANUAL Page 139
mmmmm
G: Communications PA
0x73
UNCERTAIN – simu-
lated value, start
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.
0x74
...0x77
UNCERTAIN – simu-
lated value, end
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.
a)
See
Acyclic Extended Diagnostics (General Fault Codes)
on page 143.
Condensed Status (UNCERTAIN) (cont’d)
Hex
value
Status –
UNCERTAIN
Description
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