Instruction manual

JUPITER CM-4400 Control Module Installation and Operating Manual 193
The MPK Devices Table
3. Save your changes and then validate, compile, and activate the
configuration set.
Zero-Downtime Feature
Changes can be made in the AccuSwitch controller board’s MPK Devices
Table including, editing as well as inserting or deleting rows at the bottom
of the table. These changes can then be downloaded without having to
reboot the CM-4400 controller boards which imply “Zero-Downtime.”
Row numbers on Jupiter tables are used as the “logical” numbers for
de
vices. Attempting to either insert or delete rows at a location other than
at the end of the table will disrupt control of the system and cause the fol-
lowing message to appear in the Com
piler dialog box:
Inserting (or deleting) rows other than at the end of
the
MPK Devices table will change the row numbers of
existing devices (below the insertion/deletion
point). This will require the controller boards to be
memory-cleared and reset.
One way to avoid this interr
uption to the system is to add new devices at
the end of the Jupiter tables. Clearing or resetting the memory must be
done through the Control Center (see Clearing Persistent Memory (PMEM)
on page 106).
AccuSwitch Systems Only
The Zero-Downtime feature is only supported in systems where every
control board in the system is running AccuSwitch.
• If MPK panels are in the system, then the sys
tem contains Jupiter and/
or Jupiter Xpress control boards therefore Zero-Downtime is not in
effect.
• If a Jupiter control board exists in an AccuSwitch system, then a reboot
of both AccuSwitch and Jupiter will happen on configuration changes.
• If AccuSwitch and Jupiter Xpress are in the same system, then both
control boards use PENDING REBOOT.
Entries for the L-S or LCD Panels
Although the L-S or LCD Panels are not actually MPK-type panels (the
panels have an on-board microprocessor and does not use the Message per
Key stroke protocol), the MPK table is used for configuration purposes. An
example is shown below in Figure 141 on page 191.