Precautions - Mitsubishi Electric MELSEC SW1DNC-CCIEF-B User Manual

Precautions

Adding slave stations (including the submaster stations)
If a slave station (including a submaster station) is added to a system having 120 slave stations (including a submaster
station), the system operates as follows.
■When a serial number (first five digits) of the master station is '17022' or higher
Baton pass and data link are not performed in the slave stations (including the submaster stations) added after the 121st
station, and other stations continues baton pass and data link.
Even if the disconnected stations are returned to a system having 121 or more slave stations (including a submaster station),
the stations may not start data link.
• Whether 121 or more slave stations (including a submaster station) are connected can be checked using
the following.
⋅ "Selected Station Communication Status Monitor" of CC-Link IE Field diagnostics (Page 119
Displaying diagnostics screen)
⋅ Number of connected modules over occurrence status (SB0099)
Number of connected modules detected by Number of connected modules over occurrence status
(SB0099) is the total of the slave stations (including a submaster station) which are currently connected and
the disconnected stations (slave stations which were previously connected).
• The number of stations which were previously connected can be reset by removing the disconnected station
of the CC-Link IE Field Network diagnostics. (Page 119 Displaying diagnostics screen)
A data link error may momentarily occur in all the stations and output of the connected slave stations may
turn OFF since all stations on the network will be reconnected when removing the disconnected station. Set
it to maintain output data if needed. (Page 104 Network operation setting)
■When a serial number (first five digits) of the master station is '17021' or lower
All stations will fail and data link cannot be performed.
Connecting devices to the same network
To a switching hub on CC-Link IE Field Network, do not connect an Ethernet device (e.g. personal computer) on a network
other than CC-Link IE Field Network. Doing so will cause timeout in the master station, resulting in disconnection among all
stations.
2 SYSTEM CONFIGURATION
24
2.2 CC-Link IE Field Network Configuration