Each alarm banner, alarm picture (AlarmList.grf for example), and node status object is capable of sounding a horn for any of the alarms that are displayed. Each alarm display has its own way of being configured for having the alarm horn sound or not sound. DeltaV Operate provides you with flexibility in configuring when and which alarms will sound the horn.
You will need to be familiar with alarm priorities, User_Ref/UserSettings file and the various alarm banners and pictures to configure sounding the horn.
Alarm Banners (AlarmBan.grf, AlarmBan_HAC.grf and so on) all have a Silence Horn button. The operator can silence the horn for an alarm at runtime. Alarm banners also have a Disable Horn and Enable Horn buttons. Again, this allows the operator to silence the horns at runtime.
You can also turn off the alarm horn for all operators at all workstations by configuring the User_Ref (UserSettings.grf) file. Uncomment the line: frsVariables.gs_ab_hornEnabled.currentValue = "hornDisabled" or frsVariables.gs_ab_hornEnabled.currentValue = "hornEnabled", depending on whether you want the horn on or off for all alarm banners.
Embedded Alarm Summary Control on AlarmBan_HAC.grf has the alarm sound turned on by default. This control sounds the alarm horn for the hardware alarms. To enable/disable the sound, select the control on the alarm banner picture in configure mode. Right-click and select Properties. Select the Layout tab and select/deselect the Sound Horn option.
Node Status object embedded on the AlarmBan.grf can have the alarm horn sound turned on or off. You can also set which alarm priorities sound the alarm. In the UserSettings.grf file, The "frswritevalue "0", "DVSYS.THISUSER/NODES[1].A_HPRI" setting will turn off all node status alarm sounds. Change the "0" value to any alarm priority number (4 through 15) and the horn will sound for the specified priority.
Alarm Pictures (AlarmList, AlarmSum, AlarmFilter, AlmSupp) have a configuration option to turn on/off the sound for alarms. Each picture can be configured differently so that you can have the horn sound for the AlarmList picture, but not the AlarmFilter picture. To enable/disable the sound, open the picture in configure mode. Right-click and select Properties. Select the Layout tab and select/deselect the Sound Horn option.