Cloud Electronics PM12 - Manual (Page 22)

PM4/8/12/16 Installation and User Guide v2.2 22
Power-On Non-Volatile Memory (NVM) Reset
An internal non-volatile memory (NVM) stores user settings such as Group
definitions and Zone enabling, so that these are restored automatically in the event
of power loss. The PM may be reset to the factory software defaults (group memory
empty, all zones enabled), by powering the unit on with jumper J7 set to ON. See
page 32 for a diagram showing jumper locations.
Once the reset has been performed, set J7 back to OFF, so that the factory defaults
are not recalled if there is a subsequent power interruption.
Lock Groups
It is possible to disable Zone group definition (see page 11). This feature may be
useful if groups are being defined as part of the installation and it is felt that they will
not need to be altered.
Once the groups have been defined, setting jumper J9 to ON will lock these group
settings, and it will not be possible to re-define any groups. See page 32
for a diagram
showing jumper locations.
NOTE: J7 (NVM Reset) has priority over Lock Groups. This means that even if Lock
Groups is ON when a NVM Reset takes place, the group memories will be cleared.
Priority settings
NOTE: This configuration option is only relevant to systems with more than one PM.
A PM microphone may be set to either NORMAL or HIGH priority; the factory
default is NORMAL. Paging on a network with multiple PMs all set to NORMAL
priority will operate on a ‘first-come-first-served’ basis. This means that when
simultaneous paging is attempted from two (or more) PMs, whichever microphone
starts its announcement first has command of the system and its announcement will
continue uninterrupted. The other PMs will indicate that a page is already taking place
by illumination of the BUSY LED.
Setting a PM to HIGH priority gives it precedence over PMs with NORMAL priority.
If an announcement is made from a HIGH priority microphone while one is already
in progress from a NORMAL priority microphone, that from the HIGH priority
microphone will take over. This means that microphones that are set to HIGH
priority can make an announcement even if the system is busy, as long as it is not
another HIGH priority microphone that is already in use.
A PM may be set to HIGH priority by setting J8 to ON. See page 32 for a diagram
showing jumper locations.
Note that microphone priority only applies to microphones using the Digital Paging