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WMBUS DRY CONTACTS - Guide utilisateur / User guide version V2.0.0
2.2.4 Transmission of a daily Keep Alive frame
In the event mode only, it is possible that the product would never send data frames. So to be sure that it is working properly a Keep Alive frame
is transmitted regularly according to the following diagram:
FR
EN
If one of the inputs is in periodic mode there is no Keep Alive frame transmission.
The settings associated with this mode of operation are:
• The setting of the period of transmission of the Keep Alive frame (once per hour to once per day) (register 300).
A complete list of the registers can be found in paragraph 3.4.
E.g.:
Register
S300
Product in standby
Period
reached?
Send frame 0x30
Value encoding
Decimal
No
Yes
Value
Result
72
The Keep Alive frame is sent every: 72x10=720min
i.e. 12h (or twice per day)
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