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 Value Name

1 Warning 2 Audible Alert 4 Soft Shutdown 8 Hard Shutdown 16 Utility Failure 32 Breaker #1 Trip 64 Breaker #2 Trip 128 Fault Protection Timer Enabled 256 Active Only