Precautions For System Configuration - Mitsubishi Electric MELSEC iQ-R Series User Manual

5.3

Precautions for System Configuration

Devices connected to the same network
Do not connect the devices as described below. Doing so may cause the disconnection of all stations.
• The devices having network types other than CC-Link IE TSN and Ethernet (such as CC-Link IE Controller Network and
CC-Link IE Field Network) are connected to the same network line.
• The modules on CC-Link IE TSN and Ethernet devices (such as personal computers) in various networks are connected to
one switching hub.
Adding 121 or more slave stations
If 120 slave stations are already connected and further slave stations are added, data link will not be performed in the added
121st and subsequent slave stations, but the other stations will continue data link.
Even if the disconnected stations are returned to a system having 121 or more slave stations, the stations may not start data
link.
• Whether 121 or more slave stations are connected can be checked using '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 that are currently connected and
the disconnected stations (slave stations that were previously connected).
• The number of stations that were previously connected can be cleared by executing the network map
update of the CC-Link IE TSN/CC-Link IE Field diagnostics. ( MELSEC iQ-R CC-Link IE TSN User's
Manual (Application))
• A data link error may momentarily occur in all the stations and outputs of the connected slave stations may
turn off since all stations on the network will be reconnected when executing the network map update.
Ensure that the output data is held, if necessary. (Page 34 Output hold when a data link error occurs)
Station number of the slave station to be added
Do not duplicate station numbers. Data link may be stopped when the station number is duplicated.
Adding a slave station with no IP address setting
In line topology, do not connect the slave station with no IP address setting at a place other than the end of the line. Data link
may not be performed in the slave stations after the slave station with no IP address setting.
5 SYSTEM CONFIGURATION
5.3 Precautions for System Configuration
5
33