User's Manual

7ML19985LT01 SITRANS LR560 (PROFIBUS PA) – OPERATING INSTRUCTIONS Page 133
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F: Communications PA
0xA4
...0xA7
GOOD – maintenance
required
Value is valid. Maintenance is recommended within a
medium-term period.
0xA8
...0xAB
GOOD – maintenance
demanded
Value is valid. Maintenance is demanded within a short-
term period.
0xBC
...0xBF
GOOD – function
check
Device performs internal function check without influenc-
ing the process. Value is valid.
Condensed Status (UNCERTAIN)
Hex
value
Status –
UNCERTAIN
Description
0x45
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 – mainte-
nance demanded
Usability of the process value depends on the application.
Value is potentially invalid. Cause can be determined by
reading the extended diagnostics
a)
. Maintenance is
demanded within a short-term period.
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 simula-
tion 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.
Condensed Status (GOOD) (cont’d)
Hex
value
Status – GOOD Description