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