User's Manual

USER MANUAL

PTM 210 / PTM 215 / PTM 215U / PTM 215J

DC Step code and later

Figure 14 Secure mode ULP substitution to encrypted RPS

RORG

 The secure low power switch RORG field code 0x7F is substituted by the secure tele-

gram RORG (0x30) defined in the EnOcean Security Specification [3].

DATA

 Is defined as payload of the EEP, see chapter 2.3 for details on EEP. No change in field

when extended.

MAC

 Message Authentication Cypher – defined in the EnOcean Security Specification. No

change in this field when extended.

TXID

 Represents the EnOcean Unique ID. On substitution the field is extended by 1 byte in

the MSB position with 0xFE.

STATUS

 Is created according the EEP and EPR 1 specification.

HASH

 A 4-bit CHECKSUM in extended to an 8 bit CRC or CHECKSUM. For details please see

the ERP 1 specification [4].

4.1.2 Common Frames

4.1.2.1 Encrypted RPS Telegram

The secure mode ULP supports only a selected type of Security Level Format - SLF. It does

not support SLF with transmission of RLC – “explicit RLC”. To use SLFs with explicit RLC the

definition had to be extended. Instead of redefining the secure mode ULP, the common RPS

was used with encryption which did not require any additional specification work.