2018-04
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HART Multiplexer System KFD*-HM*-16
Operation
Command Responses
The first byte contains information regarding the execution of a command.
The command-specific response code documents the execution of the command.
In contrast to the communication faults, the command responses are not coded bit by bit and
are instead numbered from 0 to 127.
For command responses reported by multiplexer devices, two instances are warnings
(codes 8 and 31). In these cases the processing of the command is continued. In other cases,
there are faults indicating that the initiating command could not be correctly executed.
The meaning of the codes is explained in the following table.
Code Designation Meaning Can occur in the case of
a command
2 Invalid selection Invalid selection: The selected code/index is
not permitted.
147, 149, 151, 153
3 Passed parameter too
large
The parameter value was too large. 59, 129, 155
4 Passed parameter too
small
The parameter value was too small. 59
5 Too few data bytes
received
The message has no faults but contains
fewer bytes than expected for the execution
of the command.
17, 18, 59, 129 to 141,
145, 147, 149, 151, 153,
154, 155, 157
8 Warning Here (132): Preamble length is not within
the range of 5 to 20 and has been set to 5
or 20
132
9 1st parameter too large The first of the two parameters is too large. 145
11 2nd parameter too large The second of the two parameters is too
large.
145
16 Access restricted The command was ignored because the
current state of the device does not permit
the correct execution of the command.
6, 17, 18, 38, 41, 42, 48,
59, 106, 128 to 157
17 Too many items
requested
Too many items have been requested. 131, 132, 133,
135 to 141, 154
31 Warning Here (137): Scan value has not been
changed as it is identical.
137
32 Busy The device is executing a function that
cannot be interrupted by this command.
6, 17, 18, 38, 41, 42, 59,
106, 128, 130 to 157
64 Command not
implemented
Command does not exist and therefore
cannot be executed. This fault message is
also output if an fault occurs that cannot be
specified more precisely by the device.
Almost all
65 Not specified Parameter is not within the permissible
range.
132, 137
Table 7.4
Note!
Additional information can be found in /1/, see chapter 9.3.
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