HART Multiplexer System KFD*-HM*-16
Operation
2018-04
75
Structure of the Second Byte (Device Status)
If a communication fault is reported in the first byte (bit 7 = 1), the second byte described here
has no significance (always 0). Otherwise it contains the overall status of the field device, i. e.,
regardless of the commands. The individual bits have the following meanings:
Bit Designation Meaning Action
7 Malfunction of the
field device
Hardware fault. The extended device
status may provide further
information, see chapter 7.3.3.
• Read extended device status,
see chapter 7.3.3.
• Check LEDs, see chapter 7.3.1.
• Parameterize device again.
6 Configuration
changed.
A write command has been
executed.
This bit can be deleted using
command 38.
5 Switch-on process is
running.
The power supply has been switched
on or a reset has been triggered.
Volatile data is reset to the default
setting.
Wait for the switch-on process and
then parameterize the device.
4 Extended device
status available.
Further status messages are
available and can be called up,
see chapter 7.3.3.
Read extended device status,
see chapter 7.3.3.
3 Analog output current
cannot be changed
(primary variable).
The primary variable is set to the
requested value and no longer
follows the process.
Always 1
Has no function on the
multiplexer device as there is no
analog output.
2 Analog output current
has reached its limit
(primary variable).
The primary variable is outside its
limit values and therefore no longer
corresponds to the process value.
Always 0
Has no function on the
multiplexer device.
1 Variable (not the
primary) outside the
range.
The data detected by the sensor –
not the data for the primary variable –
lies outside the operating range. The
extended device status may provide
further information,
see chapter 7.3.3.
Always 0
Has no function on the
multiplexer device.
0 Primary variable
outside the range.
Primary variable outside the range.
The measured value detected by the
sensor is outside the operating
range.
Always 0
Has no function on the
multiplexer device.
Table 7.5
Note!
Additional information can be found in /1/, see chapter 9.3.
To Next Page
Loading...