Scan mode
The method indicates in which target segment (line) the scan should be conducted.
This means it is not important from which interface the scan requests are sent.
| Medium | Description | Results |
|---|---|---|
| Twisted Pair | ETS sends one request per device to check whether the device exists or not (targeted Individual Address query). Slow query > 100% reliability DeviceDescriptorRead (Type 0) |
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| Power Line |
ETS sends only a few requests to check whether there are any devices or not at all in the specified domain, or whether the domain even exists (Individual Address query within the domain) Fast query > 100% reliable (because PL uses listen before talk and the devices here respond in a time slot in dependence on their Individual Address) DomainAddressSelective_Read (Type 0) |
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| RadioFrequency (Fast) |
ETS sends one request to check whether there are any devices or not at all in the specified domain, or whether the domain even exists (Individual Address query within the domain). Because several devices can respond simultaneously in this case - if they lie within the “from - to” range - it is possible for erasures of telegrams to occur for RF. Fast query > Not 100% reliable DomainAddressSelective_Read (Type 1) |
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| RadioFrequency (Default) | ETS sends one request per device to check whether the device exists or not in the specified domain or whether the domain itself even exists (targeted individual address query). Slow query > near 100% reliability. Self-search service; devices in a TP line are also found this way DeviceDescriptorRead (Type 0) |
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