Read-Only

Use the reading of a Block Tag to receive a list of Events or Alarms occurred in a device. Data, either from Events or from Alarms, is returned according to the following structure of Block Tag Elements:

•Element 1: Type of occurrence (0: Alarm or 1: Event)

•Data for Alarms (if Element 1 is equal to 0):

•Element 2: Limit

•Element 3: Rate of change limit

•Element 4: The register that triggered the alarm change

•Element 5: Current (alarmed) value of register

•Element 6: Alarm (1: Set or 0: Reset)

•Data for Events (if Element 1 is equal to 1):

•Element 2: Limit

•Element 3: Rate of change limit

•Element 4: The register that changed

•Element 5: Previous value of register

•Element 6: Current (new) value of register

•Element 7: Fixed value

•Element 8: Zero Scale

•Element 9: Operator entry work value

•Element 10: Boolean fixed bit

•Element 11: Fixed/Variable flag

•Element 12: Table entry change

•Element 13: System command change