Date Code 20010518 “Job Done” Examples - (Example 9) 4-69
SEL-2020 Instruction Manual
asserts, the SEL-2020 will issue a CLOSE command. These two bits can be controlled by
SEL
OGIC or by master port Fast Operate commands. For this example, we will use CMD bits to
control the SBR1 and CBR1 bits. See Appendix H: Configuration and Fast Operate
Commands for more information on using Fast Operate commands to trigger these operations.
Using the following steps to set the SEL
OGIC for Port 1:
*>>SET L 1<ENTER>
SET L 1<ENTER>SET L 1<ENTER>
SET L 1<ENTER>
Logic settings for Port 1
SBR1 = NA
? CMD1<ENTER>
CMD1<ENTER>CMD1<ENTER>
CMD1<ENTER>
CBR1 = NA
? CMD2<ENTER>
CMD2<ENTER>CMD2<ENTER>
CMD2<ENTER>
SBR2 = NA
? END<ENTER>
END<ENTER>END<ENTER>
END<ENTER>
SBR1 = CMD1
CBR1 = CMD2
Save changes (Y/N) ? Y<ENTER>
Y<ENTER>Y<ENTER>
Y<ENTER>
Port 1 Settings Changed
*>>
Repeat this process on Ports 2-7. The system should now be ready for operation.
TEST THE OPERATION
To test the operation, we can trigger various CMD bits and confirm that the relay properly closes
its TRIP or CLOSE contact. The ASCII command to open a breaker will be:
STORE 1:081Dh 1 sets 1:CMD1
and to close a breaker will be:
STORE 1:081Dh 2 sets 1:CMD2
The commands for the other ports will be similar.
Use a terminal or your RTU to issue one of these commands while monitoring the trip and close
contacts of the relay being operated. Confirm that the operations take place as expected.
If you are controlling the SEL-2020 from the RTU using Modbus, you can operate the SBR1 and
CBR1 bits directly. See Appendix G: Modbus Protocol for more information.
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