H-2 Appendix H Date Code 20010518
SEL-2020 Instruction Manual
FAST OPERATE COMMANDS
Using the SEL-2020 Fast Operate commands, you can set or clear any of the 256 breaker and
256 remote bits within the SEL-2020. The impact of these bits depends on whether or not they
are used in SEL
OGIC and whether or not they are used to trigger issuing of operate commands.
See Section 6: Settings for more information.
Upon receipt of a Fast Operate message, the SEL-2020 will set the appropriate bit within 100
milliseconds.
All SEL-2020 Fast Operate commands have the following format:
Bytes
Usage
2 Command (one of A5E5, A5E6, A5E7, A5E8)
1 Message length - always 8
2 Operate Code - upper byte is port number (1-16); lower byte is bit number (1-16)
2 Operation Validation Code: (4 * Operate Code) + 1
1 Checksum
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