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4 M-Bus Telegrams
1) General
• Communications according to EN1434-3
• 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 $08, 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 =
12
26.09.01, Version 1.3
GmbH, Stettiner Str. 38, D-33106 Paderborn
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
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
• VIF
10
11
12
ID3
ID4
MAN1
AC
23
24
25
PadPuls M1C User Manual
13
MAN2
48
26
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