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Appendix E BitMask Value Lists Some setpoints in Appendix C can take on multiple values simultaneously. This is particularly true for event response configurations, where an event can trigger multiple responses, such as a shutdown as well as a breaker tripping. In these cases, the setpoints are assigned bit-mask values, where different factors of two represent different optional responses. This guarantees that every combination of possible event responses will have a unique value. These possible values are given here. In order to decode a BitMask value, simply mask it with the value in question and compare it to zero, to determine whether the value is present in the setpoint. Table 15: BitMask Value Lists
Value 1 2 4 8 16 32 64 128 256
Value Name Warning Audible Alert Soft Shutdown Hard Shutdown Utility Failure Breaker #1 Trip Breaker #2 Trip Fault Protection Timer Enabled Active Only
