26 M-Bus support Page 122 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
26.5.3 Status information
Carries the Status byte element of the data header as specified in EN 13757-3:2013, 5.10,
Table 68 and 69. It is updated with every readout of the M-Bus slave device.
Significance with bit no Set
0,1 See below table See below table
2 Power low Power ok
3 Permanent error No permanent error
4 Temporary error No temporary error
5 Valve alarm M-Bus No valve alarm
6 Manufacture specific Manufacture error
7 Manufacture specific Manufacture error
Table 50: M-Bus Status information
Power low Warning
The bit “power low” is set only to signal interruption of external power supply or the end of
battery life.
Permanent error Failure
The bit “permanent error” is set only if the meter signals a fatal device error (which requires
a service action). Error can be reset only by a service action.
Temporary error Warning
The bit “temporary error” is set only if the meter signals a slight error condition (which not
immediately requires a service action). This error condition may later disappear.
Any application error
Shall be used to communicate a failure during the interpretation or the execution of a
received command, e.g. if a not decrypt able message was received.
Abnormal conditions
Shall be used if a correct working application detects an abnormal behavior like a per-
manent flow of water by a water meter.
Capture data from M_bus device
“Capture definition element”, Provides the capture_definition for M-Bus slave devices.
26.6 Data encryption for M-Bus channels
Configuration bytes, carries the Configuration field as specified in EN 13757-3:2013, 5.12.
It contains information about the encryption mode and the number of encrypted bytes. It is
updated with every readout of the M-Bus slave device.
•
Encryption according to the AES-128
•
Cipher Block Chaining (CBC) method
•
coding of the config field for AES encryption mode with a dynamic initial vector is 5
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