User's Manual

A5E32337685 SITRANS LR260 (PROFIBUS PA) – OPERATING INSTRUCTIONS Page 123
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G: Communications PA
Condensed Status
Hex
value
Status –
UNCERTAIN
Description
0x4B
UNCERTAIN – substi-
tute set
Output of Failsafe logic only.
0x4F
UNCERTAIN – initial
value
Default value as long as no measured value is available
or until a diagnosis is made that affects the value and
the status accorded to it.
0x68
...0x6B
UNCERTAIN – main-
tenance demanded
Usability of the process value depends on the applica-
tion.
Value is potentially invalid. Cause is a wear
a)
detected
in the device. Maintenance is demanded within a
short-term period.
a)
See Wear on page 49 for more detail.
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.