Elvaco CMeX50 - Slave to Master; Set Global AES128 Key; Master to Slave; Set Wireless M-Bus Mode

CMeX50 Users Manual English
CMeX50 Users Manual English
page | 68 (89)
2017-10-13
Document id: 1090055 Version 1.5
16
0x78
Optional
VIF Fabrication number
17-20
0xnnnnnnnn
Optional
CMeX50 M-Bus secondary address mask, packed
BCD
21
0xnn
Checksum
22
0x16
Stop character
6.3.14.2 Slave to master
Byte index
Data
Description
0
0xe5
Acknowledge
6.3.15 Set global AES128 key
The global AES128 key is useful when more than one wireless M-Bus slave has identical AES128 key. Set
the wireless M-Bus slave Decryption mode to Global when the global AES128 key should be used.
6.3.15.1 Master to slave
Byte index
Data
Description
0
0x68
Start character 1
1
0xnn
L-Field 1
2
0xnn
L-Field 2
3
0x68
Start character 2
4
0x43 | 0x53 | 0x63 | 0x73
C-Field = SND_UD
5
0xnn
A-Field = Address of slave
6
0x51
CI-Field = Master to slave data send
7-35(36)
0x0D7C0379656B10[KEY]
OR
0x0DFC0379656B1000[KEY]
Write global AES128 key
[KEY] = 16 bytes global AES128 key
35(36)
0xnn
Checksum
36(37)
0x16
Stop character
6.3.15.2 Slave to master
Byte index
Data
Description
0
0xe5
Acknowledge
6.3.16 Set wireless M-Bus mode
The wireless M-Bus mode is used to set which wireless M-Bus slaves the product will handle; C1, T1, S1 a
combination.