M-Bus Telegrams; Total Energy Counters 0,1,2,3; Active Tariff Number; Set Baud Rate Via Primary / Secondary Address (Snd_Ud) - Iskra MC320 User Manual

APPENDIX D: M‐BUS
Set Baud Rate via Primary / Secondary Address (SND_UD)
This telegram enables to set the desired Baud Rate. The M‐BUS MC350 confirms the correct receipt by ACK. If
the telegram was not received correctly the M‐BUS MC350 does not send an Acknowledgement. The (ACK) is
sent by the M‐BUS MC350 in the Old Baud Rate. As soon as ACK is transmitted the M‐BUS Meter switches to the
baud rate newly parameterized. If the MC350 now does not receive a new Telegram under the new baud rate
within a period of 30 – 40 seconds, it automatically switches back to the old baud rate. This is apt to prevent that
a faulty setting of the baud rate may interrupt communication.
Set Primary Address via Primary / Secondary Address (SND_UD)
This Telegram enables to set a new Primary Address. The M‐BUS MC350 confirms the correct receipt by ACK. If
the telegram has not been correctly received the M‐BUS MC350 will not send an Acknowledgement.
Set Secondary Address via Primary / Secondary Address (SND_UD)
This Telegram enables to set a new Secondary Address. The M‐BUS MC350 confirms the correct receipt by ACK.
If the telegram has not been correctly received the M‐BUS MC350 will not send an Acknowledgement.
Secondary Address (UD) consists of:
 Identification Number:
 Manufacturer's Code:
 Version Number:
 Medium:
Reset, Restart M‐BUS MC350 via Primary / Secondary Address (SND_UD)
This Telegram resets / restarts M‐BUS MC350. The M‐BUS MC350 confirms correct receipt by ACK. If the telegram
was not correctly received the M‐BUS MC350 will not send an acknowledgement.
M‐Bus Telegrams
Total Energy counters 0,1,2,3
Energy counters could represent: +/‐ active energy, +/‐reactive energy or apparent energy and one of 4‐th tariff.
DIF DIFE
T0: 04 none
T1: 84 10
T2: 84 20
T3: 84 30
T4: 84 80
A+:
A‐:
R+:
R‐:
App:
n ‐ 0...7
Active Tariff number
Tariff number in progress (1 to 4)
DIF DIFE
01
DATA: value represent as 8‐bit integer
Measuring centres – MC320, MC330, MC350 & MC350H ‐ User's Manual
00000000 – 99999999
73 26
01 – FF
02
DIFE VIF VIFE
none
none
none
none
10
0n none
8n 3C
FB 82
FB 82
FB 84
DIFE VIF VIFE
FF 01
8‐digit Secondary Address number
2 Byte Company Constant (
1 Byte
1 Byte Constant Electricity
VIFE VIFE
none none
none none
7n none
Fn 3C
7n none
VIFE VIFE
Iskra = "73 26
")
DATA
xx.xx.xx.xx
n‐3
*10 Wh
n‐3
*10 Wh
n‐3
*10 varh
n‐3
*10 varh
n‐3
*10 VAh
DATA
xx
69