Synchronous Startup Setting - Mitsubishi Electric MELSEC iQ-R Series User Manual

Synchronous startup setting

Startup time is synchronized among the CPU modules. This setting eliminates the need for an interlock program that monitors
the startup time of another CPU module when accessing it. Note, however, that the startup of the entire system delays
because the system starts up with the last CPU module.
[System Parameter]  [Multiple CPU Setting]  [Operation Mode Setting]  [Synchronous Startup Setting]
Window
Displayed items
Item Description
PLC No.1 Set the CPU modules whose startup time is synchronized in
the multiple CPU system.
PLC No.2
PLC No.3
PLC No.4
• Group setting for the synchronized start-up is available. For example, a setting in which only CPUs No.1
and No.2 start synchronously within a multiple CPU system with four CPU modules is possible.
• If a reserved (empty) CPU is specified to synchronize, it is skipped and the other CPUs in the group start
synchronously.
• This setting is designed to access to each CPU module without interlock in the multiple CPU system. It is
not intended to be used for starting operation processing at the same time across CPU modules after
startup.
Setting range
• Synchronize
• Do not Synchronize
23 MULTIPLE CPU SYSTEM FUNCTION
Default
Synchronize
23.2 Operation Settings
23
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