User Manual

Table Of Contents
Appendix 139
Mailbox Command References
WAGO-I/O-SYSTEM 750
I/O Modules
6.3.5.17 Write Local Bluetooth
®
Password (SetLocalPassphrase, 0x52)
With this command, the local password can be configured. The module calcu-
lates the "Link Key" from the locally saved password. This is necessary during
active authentication for the establishment and data encryption. The Blue-
tooth
®
password must therefore be identical for all devices intended to com-
municate with each other.
Note
Security quality depends on the selected password. The password should be
as long as possible and selected randomly.
Modules can only connect to each other if they have the same settings for
encryption, authentication and password.
Conditions
Mailbox size Operating mode/profile Device role
6 12 18 Config.
Real-
time
Ad hoc Master Slave
Save
config.
Restart
- () () - - -
Request
Byte 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
0 MBX_SETLOCALPASSPHRASE
1 T -
2 MBX_PSW_Length
3 MBX_PSW_Byte 1
4 MBX_PSW_Byte 2
5 MBX_PSW_Byte 3
6 MBX_PSW_Byte 4
7 OPTIONAL MBX_PASSPHRASE_Byte 5
... …
17 OPTIONAL MBX_PASSPHRASE_Byte 15
Arguments
Parameter Value Description
MBX_PASSPHRASE_Length [4...15] Password length
MBX_ PASSPHRASE_Byte n Characters (ASCII) Password as ASCII representation