Enable/Disable rate-of-change alarms

The .AlarmROCEnabled and .AlarmROCDisabled dotfields enable or disable rate-of-change alarms for a tag or alarm group based upon their respective values. The rate-of-change alarm states associated with both dotfields are the inverse of each other. In the case of .AlarmROCEnabled, a value of 1 enables rate-of-change alarms for a tag or alarm group. An .AlarmROCDisabled value of 1 disables rate-of-change alarms for a tag or alarm group.

When either dotfield enables rate-of-change alarms for an alarm group, all tags that belong to the group have rate-of-change alarms enabled. When either dotfield disables rate-of-change alarms, all rate-of-change alarms are ignored. The rate-of-change alarms are not stored in alarm memory, nor are they written to disk.