Mitsubishi Electronics Q172HCPU Home Security System User Manual


 
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2 MULTIPLE CPU SYSTEM
(3) A total of eight base units including one CPU base unit and seven extension base
units can be used. However, the usable slots (number of modules) are limited to
64 per system including vacant slots. If a module is installed in slot 65 or
subsequent slot, an error (SP. UNIT LAY ERROR) will occur. Make sure all
modules are installed in slots 1 to 64. (Even when the total number of slots
provided by the CPU base unit and extension base units exceeds 65 (such as
when six 12-slot base units are used), an error does not occur as long as the
modules are installed within slots 1 to 64.)