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CHAPTER 8 FUNCTIONS
8
8.8 Submaster Function
8.8.5 Switch from the master station to the submaster station
8.8.5 Switch from the master station to the submaster station
This section describes conditions where the master operating station is switched to the submaster operating station.
(1) Automatic switch
The control is switched under one of the following conditions.
*1 When "Return as Sub-Master Station" is selected, the submaster station continues to be in control, and the master
station returns as a submaster operating station. When the submaster station (master operating station) is disconnected
after return, the master station operates as a master operating station.
● A disconnected submaster station is always returned as a submaster operating station.
● When the operation is switched, a temporary data link error is detected. To continue the control with the output of the
slave station being held, configure the settings of each station as follows:
• Master/local module
Select "Hold Input Data (RX/RY)" under "Data Link Faulty Station Setting".
Project window [Parameter] [Network Parameter] [Ethernet/CC IE/MELSECNET]
button
• Modules other than a master/local module
Configure the settings where the output of the slave station is held upon a data link error.
( Manual for the slave station used)
Condition Description
Disconnection of the master station
(master operation)
If an error occurs in the master station while the master station is operating as a master operating
station and the submaster station as a submaster operating station, the submaster station starts
to take in control.
Return of the disconnected master
station
(This applies when "Return as Master
Station" is selected in the "Operation
Setting for Returning" field on the
"Supplementary Setting" window.)
*1
The control is switched when the disconnected master station returns while the submaster
station is operating as a master operating station.
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