HART Multiplexer System KFD*-HM*-16
Diagnosis and fault elimination
DO
C
T-0
120D
06/
2014
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8.3.3
Device status (structure of the second byte)
If a communication error is indicated in the first byte (Bit 7 = 1), the second byte
described here has no significance (always 0).
In the other case, it contains the status of the field device in full, i.e. independent of
commands.
The individual bits have the following meaning:
Bit Description
Meaning
Corrective action
7
Error function of the field
device (malfunction)
Hardware fault. The extended device
status may provide further
information (see section 8.4).
• Read extended device status
• Check LEDs (section 8.2).
• Re-parameterize device.
6
Configuration changed
(Configuration changed)
A write command has been executed. This bit can be cleared by
command 38.
5
Start-up sequence is running
The power supply has been
connected or a reset has been
activated. Transient data are reset to
the preset values.
Wait for the start-up sequence,
then parameterize the device.
4
Extended device status
available
Further status messages are
available and can be called up, see
Read extended device status
3
analog output current fixed
(primary variable)
The primary variable is fixed at the
requested value and no longer
follows the process.
always 1
(has no function on the
Multiplexer, since there is no
analog output)
2
analog output current has
reached its limit (primary
variable)
The primary variable lies outside its
limit value and therefore no longer
corresponds to the process value.
always 0
(has no function on the
Multiplexer)
1
Variables (not the primary one)
outside the range
The values detected by the sensor
(not for the primary variable) lie
outside the operating range. The
extended device status may yield
additional information (see
always 0
(has no function on the
Multiplexer)
0
Primary variable outside the
range
The measured value detected by the
sensor lies outside the operating
range.
always 0
(has no function on the
Multiplexer)
