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===== B5h 05h – Burner Operational Data =====

This Broadcast informs about the operational data of the burner control unit. It seems to be a Vaillant specific variant of Service 08h 01h.

^Master/ Slave Byte-No. ^Abbrev. ^Description ^Unit ^Range ^Type/ [Res.] ^Repl. Value ^Note ^
|M1  |QQ  |Source address  |   |   |   |   |   |
|M2  |ZZ = FEh  |Target address  |   |   |   |   |   |
|M3  |PB = B5h  |Vaillant command  |   |   |   |   |   |
|M4  |SB = 05h  |Burner Operational Data?  |   |   |   |   |   |
|M5  |NN = 02h  |Length of data  |   |   |   |   |   |
|M6  |xx = 04h\\ xx = 29h  |   |   |   |   |   |unknown  |
|M7  |yy = 00h  |   |   |   |   |   |unknown  |
|M8  |CRC  |   |   |   |   |   |   |
|M9  |SYN  |   |   |   |   |   |   |

^Master/ Slave Byte-No. ^Abbrev. ^Description ^Unit ^Range ^Type/ [Res.] ^Repl. Value ^Note ^
|M1  |QQ  |Source address  |   |   |   |   |VRS620  |
|M2  |ZZ = FEh  |Target address  |   |   |   |   |   |
|M3  |PB = B5h  |Vaillant command  |   |   |   |   |   |
|M4  |SB = 05h  |Burner Operational Data  |   |   |   |   |   |
|M5  |NN = 04h  |Length of data  |   |   |   |   |   |
|M6  |xx = 27h  |(unknown)  |   |   |   |   |unknown  |
|M7  |   |Bit0 = BW_load  |   |   |BYTE  |   |00h, 01h\\ This bit is active when service water is loaded.  |
|M8  |VT  |Lead water temperature  |°C  |0-89  |CHAR  |5A h  |Vorlauftemperatur IST HK1\\ VF1-Fühler  |
|M9  |   |Bit0 = BW_load  |   |   |BYTE  |   |00h, 01h\\ This bit seems to be synchronous to M7 Bit0.  |
|M10  |CRC  |   |   |   |   |   |   |
|M11  |SYN  |   |   |   |   |   |   |

.M6 xx=2Dh gesehen, dabei haben die Daten M7 - M9 aber andere Werte gehabt.

==== Block 36h – Unknown ====

^Master/ Slave Byte-No. ^Abbrev. ^Description ^Unit ^Range ^Type/ [Res.] ^Repl. Value ^Note ^
|M1  |QQ  |Source address  |   |   |   |   |10h  |
|M2  |ZZ  |Target address  |   |   |   |   |FEh  |
|M3  |PB = B5h  |Vaillant command  |   |   |   |   |B5h  |
|M4  |SB = 05h  |Get Data Block  |   |   |   |   |04h  |
|M5  |NN = 02h  |Length of data  |   |   |   |   |01h  |
|M6  |DB = 06h  |Block 06h  |   |   |   |   |06h  |
|M7  |NN  |On/OFF??  | | | | |Zubegin von Einmaliger Speicherladung mit 01h und zum Ende 00h 00h / 01h  |
|M8  |CRC  |   |   |   |   |   |D9h  |

^Master/ Slave Byte-No. ^Abbrev. ^Description ^Unit ^Range ^Type/ [Res.] ^Repl. Value ^Note ^
|M1  |QQ  |Source address  |   |   |   |   |VRS620  |
|M2  |ZZ = FEh  |Target address  |   |   |   |   |   |
|M3  |PB = B5h  |Vaillant command  |   |   |   |   |   |
|M4  |SB = 05h  |Burner Operational Data  |   |   |   |   |   |
|M5  |NN = 08h  |Length of data  |   |   |   |   |   |
|M6  |xx = 2Bh  |(unknown)  |   |   |   |   |unknown  |
|M7  |   |   |   |   | | |gesehen 0Fh  |
|M8  |   | | | | | |gesehen 01h  |
|M9  | | | | | | |gesehen 00h  |
|M10| | | | | | |gesehen 00h|
|M11| | | | | | |gesehen 00h|
|M12| | | | | | |gesehen 00h|
|M13| | | | | | |gesehen 80h|
|M14  |CRC  |   |   |   |   |   |   |
|M15  |SYN  |   |   |   |   |   |   |

==== Block 3C - VR 81 remote control unit for VRC 430(f)/470(f) ====

^Master/ Slave Byte-No. ^Abbrev. ^Description ^Unit ^Range ^Type/ [Res.] ^Repl. Value ^Note ^
|M1  |QQ = 30h  |Source address  |   |   |   |   |30h  |
|M2  |ZZ = 26h  |Target address  |   |   |   |   |26h  |
|M3  |PB = B5h  |Vaillant command  |   |   |   |   |B5h  |
|M4  |SB = 05h  |Get Data Block  |   |   |   |   |05h  |
|M5  |NN = 05h  |Length of data  |   |   |   |   |05h  |
|M6  |DB = 3Ch  |Block 3Ch  |   |   |   |   |3Ch  |
|M7|RC_A_L|Current room temperature (not corrected by offset value)| | |data2c| | |
|M8|RC_A_H| ::: | ::: | | ::: | | |
|M9|RC_B_L|Current room temperature (corrected by offset value)| | |data2c| | |
|M10|RC_B_H| ::: | ::: | | ::: | | |
|M11  |CRC  |   |   |   |   |   |D9h  |
|M12|ACK| | | | | | |

This frame can be used to determine the current room temperature reliably. The target room temperature and the current heating status (off, day, night) can be found in the frame (qq=30h, zz=26h, pb=B5h, sb=04, nn=01, first data byte 26h).

\\
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