User manual wM-Bus Dongle SW Tool
Appendix B: OMS T1 meter set-up
5512-1057 GB / 12.2011 / A1
Figure 9
If the option board (radio module) in the meter is an OMS T1 type, the set-up should be as follows:
• Transfer the data from the Main tab, or enter the METER ADDRESS manually.
• Set the options as shown, i.e. tick the checkboxes Meter enabled and Meter data valid (Options
in HEX = 49).
• Set Meter install state to 1 as there is no installation procedure.
• T1 period (in seconds) and T2 fraction cannot be set.
• Set IEK and KEY to the same transport key.
• Rev B barcode is not used.
• The Option Board data fields are not used.
No Encryption on M-Bus:
• Untick this checkbox if the decryption has to be done in the back office (then the Options in HEX
will show 41).
Important for OMS: Both IEK and KEY must be set, and set to the same key.
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