Data Frame - ADEUNIS WMBUS TEMP Guide D'utilisateur

WMBUS TEMP - Guide utilisateur / User guide version V2.0.0

4.2.5 Data Frame

This frame (0x43) contains the values measured on the different sensors.
0 1
Code Status
FR
0x43 Cf Status
0x43 0xA2
Description of the frame:
• Byte 2:
EN
o Bits 0 to 3:
0: unknown/absent/error
1: CTN internal sensor B57863S0321F040
o Bits 4 to 7: The user identifier defined in register 320
• Bytes 3 to 4: Value measured on the internal sensor
• Signed value on 16 bits,
• Expressed in tenths of degrees,
• Most Significant Byte first
• The special value 0x8000, equivalent to -3276,8°C is returned in the event of a fault in the sensor.
• Byte 5:
o Bits 0 to 3:
0: unknown/absent/error
1: unknown
2: CTN external sensor FANB57863-400-1
o Bits 4 to 7: The user identifier defined in register 322
• Bytes 6 to 7: Value measured on the internal sensor
• Signed value on 16 bits,
• Expressed in tenths of degrees,
• Most Significant Byte first
• The special value 0x8000, equivalent to -3276,8°C is returned in the event of a fault in the sensor.
In the example in grey this gives:
• Byte 2=0xD1:
o Bits 0 to 3 = 0x1: The internal sensor is present
• o Bits 4 to 7 = 0xD: the identifier of the internal sensor defined by the user is equal to 0xD
• Bytes 3 to 4=0x015E: The value measured on the internal sensor is 350/10=35°C
• Byte 5=0x82:
o Bits 0 to 3 = 0x2: The external sensor is of the type external CTN sensor FANB57863-400-1
o Bits 4 to 7 = 0x8: the identifier of the internal sensor defined by the user is equal to 0x8
• Bytes 6 to 7=0xFF06: as this field is signed the hexadecimal value 0xFF06 = -250. Hence the value measured on the external sensor is
-250/10=-25°C
2 3 4
internal
Value read on the
sensor
internal sensor
identifier
0xD1 0x015E
5 6 7
PAYLOAD
External
Value read on the
sensor
internal sensor
identifier
0x82 0xFF06
8 9 10
X
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