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4 M-Bus Telegrams
1) General
• Communications according to EN13757-2 and -3
• Transmission rates 300, 2400 and 9600 Bd with auto-baud detect
• Primary and secondary addressing with wild cards
• SND_NKE / E5, SND_UD / E5, REQ_UD2 / RSP_UD is supported
2) Definitions
• All values are specified in hexadecimal
• Empty fields in the "Contents" line are variable
• Index 1 designates the least-significant byte in fields containing several bytes
3) RSP_UD Telegram
Byte
1
2
Name
Start
Length
Inhalt
68
1B
Byte
14
15
Name
GEN
MED
Inhalt
Byte
27
28
Name
Count6
Spez.
Variable
00
0F
Notes:
• Manufacturer MAN = "REL" (48AC)
• Generation GEN (at this time $09, reserved range from $01 to $0F)
• Status bit 7 (MSB):
• VIF: Set by the user; VIF = unit with decimal power (MSB not set)
• Count: Meter reading (most-significant byte = Count6 always zero)
• Numerator / Denominator: Impulse value (increment in multiples of the VIF per impulse):
1 Pulse =
User Manual PadPuls PadPuls M1 · 10/2018 · VERSION 1.4
3
4
5
Length
Start
C
1B
68
08
16
17
18
TC
Status
SIG1
00 / 80
00
29
30
31
Index
Numerator
Denominator
01
1 →
write protection set
0 →
write protection removed
Numerator
• VIF
Denominator
6
7
8
9
A
CI
ID1
ID2
72
19
20
21
22
SIG2
DIF
VIF
Count1 Count2 Count3 Count4 Count5
00
06
32
33
CS
Stop
16
PadPuls M1
10
11
12
13
ID3
ID4
MAN1
MAN2
AC
48
23
24
25
26
13
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