HART Multiplexer System KFD*-HM*-16
Appendix
2018-04
81
9.1.2 Common Practice Commands
9.1.3 Device-Specific Commands
Command Action Meaning
38 Reset the status
Configuration changed.
Delete status message, see chapter 7.3.2.
41 Perform device self-test. Performs the device self-test, such as when switching on
the power supply. If no fault occurs, the status message
Malfunction is deleted if it has been set, see chapter 7.3.2.
42 Perform device reset. Immediately after the command confirmation, the
device processor is reset.
48 Read extended
device status.
See chapter 7.3.3.
59 Define the number of
response preambles.
The number of preambles inserted in message responses
can be set to between 2 and 20. The default setting is 4.
106 Delete all delayed responses
pending for the master.
The pending response messages are deleted. As only one
response message buffer exists, the buffer is always deleted
in accordance with the specification regardless of the
requesting master.
Table 9.2
Command Action Meaning
128 Read the parameters of the
multiplexer device.
The current parameterization is read from the
multiplexer device.
129 Read the status of the
signal loop.
This command can be used to query the status of
each signal loop. The following information is provided:
• Existing hardware faults
• Scan is in progress.
• Scan activated for this signal loop.
• Field device is being searched for due to the
Disappeared designation.
• Field device is no longer responding (Disappeared).
• Field device responds again (Appeared).
• Another field device has responded instead
(Mismatched).
130 Read field device list
(maximum of 49 entries,
starting with the specified
index).
The extended addresses of up to 49 field devices are
returned from the specified list entry.
131 Read static data from up to
22 field devices.
For the specified extended addresses, the function returns
the following field device data:
• Number of the signal loop (0 to 15)
• Polling address
•Supported HARTrevision
• Required minimum number of preambles (5 to 20)
132 Write static data from up to
22 field devices.
Write the static data, see command 131. A preamble length
outside the range of 5 to 20 is set to 5 or 20.
133 Delete field devices from the
field device list
(max. 35 simultaneously).
Field devices with the specified extended address
are deleted from the field device list (and the scan list).
134 Read scan list
(max. 49 entries, starting with
the specified index).
The extended addresses of up to 49 field devices
are returned from the specified list entry.
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