Appendix C: Communications via PROFIBUS
C.9 Condensed status
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
271
Condensed Status (UNCERTAIN)
Hex value
Status - UNCERTAIN Description
0x73
UNCERTAIN –
simulated 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 simulation
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 –
simulated
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 simulation
ends.
While this status is active there is no reliable process value.
Measured values and their status are updated
afterwards.
See Acyclic Extended Diagnostics (General Fault Codes) (Page 275).
Condensed Status (BAD)
Hex value
Status - BAD
Description
0x00
BAD – non specific
Proxy determines that a device does not communicate.
0x23
BAD – passivated
(diagnostics
alerts disabled)
Configured failsafe value is used, accompanied by this
status.
0x24
...0x27
BAD – maintenance
alarm, more
diagnosis available
No measurement available because of a failure.
0x25
BAD – process
related, no
maintenance
No measurement available because of invalid process
conditions.
0x3C
...0x3F
BAD – function check
/ local override, value
not usable
Occurs during cleaning or calibration process.