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SCU200
INSITE ENERGY MANAGEMENT SYSTEM
7.2.Wireless M-Bus
7.2.1.Wireless M-bus devices readings
SCU200 allows to connect up to 16 INS-WM modules ( in case of no INS-E3 modules are connected. ). They
can be addressed using Modbus ID from range 49-63.
Each module can be configured to listen on Wireless MBus mode
C1
or
T1
. They are fixed to operate on
868.95MHz radio frequency
.
In addition, each module have selectable antenna port ( internal is default ).
Modules can securely store Wireless MBus encryption key with meter ID and manufacturer identification.
Supported security modes are
mode 5
and
mode 7
. Also unencrypted data from meters are supported.
All necessary configuration can be performed by Modbus protocol.
• Modbus communication settings
Baudrate
Data bits
Stop bits
Parity
115200
8
1
E
• Modbus communication settings
Address
(hex)
Address
(dec)
Number of
registers
Access Description
Memory type
0x20
32
1
R/W
Wireless M-Bus mode
Non volatile
0x21
33
1
R/W
Antenna selection
Non volatile
0x22
34
1
R
Number of messages
Volatile
0x23
35
1
R
Message length
Volatile
0x24
36
1
R
Message RSSI
Volatile
0x25
37
4
R
Meter address
Volatile
0x29
41
121
R
M-Bus data
Volatile
0xA2
162
7
R
M-Bus data ( rest )
Volatile
0x200
512
1
W
SW reset
Volatile
0x201
513
1
W
Factory reset
Volatile
• Wireless M-Bus mode [0x20]
This register is used to select WMBus operation mode. It accept ASCII values ‘C’ or ‘T’ for desired wireless
M-Bus mode.
After changing mode, restart of device is required.
• Antenna selection [0x21]
This register is used to select antenna for reception of wireless data. It accepts values 0 or 1 – where 0 is
for internal onboard antenna, thus 1 selects external antenna on SMA connector.
Also due to requirement
of reinitialize onboard radio, restart of device is required to take effect
.
• Number of messages [0x22]
This register holds number of received wireless M-Bus frames in device queue. It is automatically
decreased after read of entire M-Bus data registers. Device can stack up to 64 frames.
• Message length [0x23]
This register indicate length of M-Bus message in bytes that is available to read from M-Bus data
registers. It is automatically updated with length of next message after read from M-Bus data registers.
• Message RSSI [0x24]
This register hold RSSI – signal strength indicator of received frame, that is available for read in M-Bus
data registers. After read from M-Bus data registers, this value is updated with RSSI of next frame in
queue. Value is presented in dBm units without sign ( positive value ), so to correctly obtain RSSI in dBm,
this value should be multiplied by -1.
Содержание SCU200
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