GE Industrial Solutions Entellisys 5.0 Integrator's Guide - Manual (Page 11)

Breaker Control 11
1.2 Breaker Control
In addition to PLC inputs, Modbus TCP clients can directly control the breakers by issuing
breaker commands.
Because the Entellisys CPU employs only one Modbus table, breaker commands are sent to
input registers rather than input coils. To send a command, a “1” must be written to the
appropriate register.
Command for all breakers are relayed down to the messenger at the next protection pass,
which occurs every 1/2 cycle.
NOTE: The 3rd party modbus client must send the write command to both CPUs to ensure the
command reaches the Messenger.
The breaker command registers for all 30 breakers begin at address 4CD6 and repeating for each of
up to 30 breakers. See
SRC X Node Command Registers on page 86 for details and memory
locations.
Table 1-4 Available Breaker Commands
Modbus Security
For added security, a “Command Password” can be configured in the HMI. If set, the breaker
command registers, as with all Entellisys command registers, will require the password to be
sent first before the command. See
Modbus Security on page 18 for more details on
implementation. See Section 4.2 in DEH 500 System Administrator’s Manual for configuration
details.
Register offset from 4CD6 Command
0 Open Breaker 1
1 Close Breaker 1
2 Trip Breaker 1
3 Clear Energy on Breaker 1
5 Breaker 1 Remote Lockout Enabled
6 Breaker 1 Remote Lockout Reset