Version: 1.06 110
17. Access security
This (optional) access security of the TB
OX
MS prevents
non-authorized persons from accessing the RTU.
If the Access security option is activated, each port of the TB
OX
MS can be independently
protected.
The standard protection concerns ‘ModBus’ protocol, on serial and modem ports.
A protection on Ethernet connection is not available yet.
The protection is based on a four-digit hexadecimal global code that is saved in the
TB
OX
MS. This code allows different logins related to different users with different access levels to
the TB
OX
MS.
Three access levels are available:
• Level 1:
Surveillance mode or VISUALIZATION MODE. The operator can view all
TB
OX
MS
values (local or remote), but cannot execute any command.
• Level 2:
COMMAND MODE, the operator can view all the values and execute
commands (locally or remotely). Also known as READ/WRITE MODE.
• Level 3:
ENGINEER MODE, the operator can view all the values, execute commands
and send new application (locally or remotely).
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