Passwords16
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4.2 Modbus® security

4.2.1 Control and settings passwords

The CPUs require extra passwords to cha nge settings (i.e., Short T ime pickup delay setting ) and
to send commands (i.e., Open Breaker command). These passwords apply to all clients that
access the Entellisys system through Modbus communications including the Entellisys HMI,
SCADA, or Building Automation , etc.
NOTE: The system ships with defa ult CPU Modbus Settings an d Command passwords. The
System Administrator should change these passwords for added security.
The HMI can be conf igured to transparently send the passwords whenever needed or it can be
configured to require all use rs to re-enter the password when the action is attempted.
Figure 4-5 Modb us Security screen in the HMI