Slmp Communication - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

28.16

SLMP Communication

The following describes the precautions on SLMP communications.
System switching
There are the following notes when the system IP address matching function is not used.
■Re-setting of the connection destination
When the relay CPU module is in the communication-disabled state (power-off, reset, or tracking cable disconnection) at
system switching, the connection destination needs to be set again for SLMP communications.
■Re-execution of the write command
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When "Control System" or "Standby System" has been selected in the transfer setup and the systems are switched, a target
system mismatch is detected by a command issued during the system switching, and a communication error occurs. If a
communication error occurs while a data write command is being issued, the data write command needs to be issued for the
new control system.
Remote operation
If a remote operation command is executed, the CPU modules enter different operating statuses and thus systems cannot be
switched.
Communicating with other systems
For SLMP communications via the built-in Ethernet port of the CPU module, when communications are performed to the other
system that cannot respond (power-off, reset, or tracking cable disconnection), a timeout error may occur.
External device Own system The other system
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28.16 SLMP Communication