User's Manual

© 2020 EnOcean | www.enocean.com PTM 210 / PTM 215 / PTM 215U / PTM 215J User Manual August 2020 | Page 21/45
USER MANUAL
PTM 210 / PTM 215 / PTM 215U / PTM 215J
DC Step code and later
4 Radio Communication
The PTM module transmits radio telegrams based on the EnOcean Alliance Radio standard.
The Radio standard uses the ISO/IEC standard on the lowest protocol level.
There are two version of the EnOcean Radio Protocol:
1. “EnOcean Radio Protocol 1” ERP 1 based on ISO/IEC 14543-3-10 mostly present in
Europe & China
2. “EnOcean Radio Protocol 2” ERP 2 based on ISO/IEC 14543-3-11 mostly present in
US & Japan
The used radio standard defines the radio telegram structure. In the ERP1 there is also a
difference between ultra-low power (ULP) frames and common frames.
4.1 ERP 1 Communication
The ERP1 uses different radio telegram structures depending on the operation mode of the
PTM module. These structures are:
Normal mode uses “normal mode ULP”
Secure mode with implicit RLC legacy, not recommended uses “Secure mode ULP”
Secure mode with explicit RLC recommended uses “Encrypted RPS Telegram”
The above-mentioned telegram frames are described in the chapters below.
4.1.1 ULP Frames
To save energy the ULP Frames have effectively less payload than the common telegrams.
The ULP Telegrams are also described in the EnOcean Alliance Air Interface Certification [3].
4.1.1.1 Normal mode ULP
The normal mode ULP has total length of 6 bytes. The common frame (RPS), which the ULP
is extend to, is 8 bytes long.
Please consider that EnOcean based receivers & repeaters will transform the ULP telegrams
to common frames by default.