GE Industrial Solutions Entellisys 5.0 Integrator's Guide - Manual (Page 12)

Control Features 12
1.3 Restricted Breaker Control
In systems with certain supervisory control schemes, such as a paralleling gear application, it
may be necessary to deny breaker control from the user or from other Modbus TCP clients.
Using the Restricted Breaker Control feature, a code can be added for open, close and trip
operations for selected breakers. Each function (open/close/trip) can be configured
independently for a selected breaker. When Restricted Breaker Control is enabled for a
particular breaker, normal command registers are disabled and the CPU will expect the
pre-configured code to be written to a different register for the respective breaker for open,
close or trip commands.
NOTE: Restricted breaker control does NOT interfere with protective relays or FlexLogic and
their ability to operate the breaker.
Enabling Restricted Breaker Control: See section 1.4.1 on page 15
Events:
Following events are issued when a restricted breaker receives either a open, close or trip
command.
• Breaker Open/Close/Trip Command Restricted Control Received: CPU acknowledged
that the “SRC X Open/Close/Trip Breaker By Restricted Control” register received the
correct command code.
• Breaker Open/Close/Trip Cmd Restricted Cntrl Incorrect Code: CPU reported that the
“SRC X Open/Close/Trip Breaker By Restricted Control” register received the incorrect
command code.
• Breaker Open/Close/Trip Cmd Restricted Control Not Enabled: CPU reported that the
“SRC X Open/Close/Trip Breaker By Restricted Control” register received a command but
the Restricted Breaker Control is disabled.
• Breaker Open/Close/Trip Command Restricted Control Enabled: CPU acknowledged
that the normal Open/Close/Trip command was rejected because the associated
command was restricted for the breaker. See
Setup on page 13 .
Restricted Operation: (Restricted command enabled)
For restricted operations, the SRC X Node Command Registers on page 86 are ignored and the
CPU will only send a open, close and trip command to a messenger if the value written to SRC X
Restricted Breaker Control Registers on page 105 matches the code entered for the command
in question in the “Restricted Breaker Control” setting screen. (See Setup on page 13 )
Function Enable
The Restricted Breaker Control function can only be enabled by the factory. When disabled, the
user controls in it’s associated configuration screen are disabled.