Mitsubishi Electric MELSEC-Q Series User Manual page 128

(2) How to start communications
Power on the slave station, then master station to start data link.
When the parameter settings are reflected, the master/local module starts data link automatically.
• When the settings are configured using a programming tool, resetting the CPU module or powering off and
on the system reflects the settings.
• When the settings are configured using dedicated instructions, executing the dedicated instructions reflects
the settings.
Note that the master station sends data only to a station where data link has been started. The master station
does not send data to a station where data link is not being performed.
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