HART Multiplexer Master KFD2-HMM-16
Diagnosis and Fault Elimination
26
Subject to reasonable modifications due to technical advances.
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5.3.3
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:
17
Too many items requested
131, 132, 133,
135 ... 141, 154
31
Warning
Here (137): SCAN value has not been chan-
ged, since it is identical.
137
32
Busy
The device is executing a function, which
cannot be interrupted by this command.
6, 17, 18, 38, 41, 42,
59, 106, 128,
130 ... 157
64
Command not implemented The command does not exist and therefore
cannot be executed.
This error message is also output if an error
occurs that cannot be accurately specified
by the device.
Almost all
65
Not specified
Parameter not in the permissible range.
132, 137
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 5.4).
•
Read extended device status
(section 5.4)
•
Check LEDs (section 5.2)
•
Re-parameterise device
6
Configuration changed
(Configuration changed)
A write command has been execu-
ted.
This bit can be cleared by com-
mand 38.
5
Start-up sequence is running The power supply has been con-
nected or a reset has been activa-
ted. Transient data are reset to the
preset values.
Wait for the start-up sequence,
then parameterise the device.
4
Extended device status
available
Further status messages are
available and can be called up; see
section 5.4.
Read extended device status
(section 5.4)
3
Analogue output current
fixed (primary variable)
The primary variable is fixed at the
requested value and no longer fol-
lows the process.
Always 1
(Has no function on the multiple-
xer, since there is no analogue
output)
2
Analogue 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 multiple-
xer)
1
Variables (not the primary
one) outside the range
The values detected by the sensor
(not for the primary variable) lie out-
side the operating range. The
extended device status may yield
additional information (see section
5.4).
Always 0
(Has no function on the multiple-
xer)
0
Primary variable outside the
range
The measured value detected by
the sensor lies outside the opera-
ting range.
Always 0
(Has no function on the multiple-
xer)
Code
Description
Meaning
Can occur with
commands ...
