3–4 Model 2100 and 2200 Ultra SCSI Controller Enclosures User Guide
Audible Alarm
By default, the EMU generates an audible alarm each time it detects an error condition.
The audible alarm horn (or horn) can be muted or disabled using the EMU bezel switches.
Muting is only capable when the horn is enabled. Holding the group switch (refer to
Figure 3–2,
6) temporarily toggles the horn O
N
(mute) or O
FF
(unmute). Detection of any
new error condition overrides the mute function, and sounds the audible alarm for the
severest active error condition.
To mute and unmute the horn:
■
Mute — Press and hold the group switch for approximately 2 seconds. The group
switch LED turns O
N
and the audible alarm turns off when the horn is muted.
■
Unmute — Press and hold the group switch for approximately 2 seconds. The group
switch LED turns O
FF
and the audible alarm can sound when the horn is unmuted.
The horn (
Ho
) feature enables or disables the horn. Disabling the horn prevents an audible
alarm from sounding at all times until the horn is enabled again. Disabling the horn also
turns O
N
the group switch LED.
Navigate to the
Ho
display by using the group switch (see Figure 3–2,
6). From the EMU
default display (the
id
address setting, such as
--
), press the group switch twice. With
Ho
in
the alphanumeric display, press the increment button (
1 in Figure 3–3) once to view the
current setting. Change the current horn mode setting, from either enabled (
En
) to disabled
(
di
), or vice versa, by using both the increment and group switches as indicated in the
Figure 3–3. The
Ho
default setting is
En
.
