1. ALARM_D: Ethernet Global Data

Each system wide PPS function block broadcasts a portion of its instance data onto the Ethernet global data highway. This data is used to interface with the function block from an HMI station in order to monitor and control a process system.

The Ethernet global data for the PPS ALARM_D block is as follows.

Global Data	Data Type	Description
AS [0]	DWORD	Alarm State Information
AS [1]	DWORD	Alarm State Information
		Timestamp		The number of seconds since 1-1-1970
FC	UINT	Faceplate Command
		FC = 1	Set Acknowledgement
		FC = 2	Activate Alarm Suppression
		FC = 3	De-activate Alarm Suppression
		FC = 4	Alarm Setting = Alarm on 0
		FC = 5	Alarm Setting = Alarm on 1
		FC = 6	Alarm Setting = Alarm on Change
ST	WORD	HMI Status Word