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8.1 Troubleshooting Flow
8.1.12 When "SP. UNIT DOWN" Occurs
8
TROUBLESHOOTING
8.1.12 When "SP. UNIT DOWN" Occurs
The following shows the flowchart for when "SP. UNIT DOWN" occurs during operation of
the redundant system.
Diagram 8.13 Flowchart for when "SP. UNIT DOWN" Occurs
Is a module incompatible with the
CPU module mounted?
Is first 5 digits of serial No. of the
CPU module "10042" or later?
Is the module on
the relevant slot mounted
correctly and the extension cable
of the relevant base unit
connected correctly?
An error message
[SP.UNIT DOWN] was detected.
YES
YES
NO
NO
NO
NO
YES
Is CC-Link IE Controller
Network module mounted?
YES
Replace the CPU module with the one
whose first 5 digits is "10042" or later.
Remove the relevant module.
Mount the module on the relevant slot
correctly or connect the extension cable of
the relevant base unit correctly.
Check operation starting from a minimum
system. For modules that do not operate,
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.
