Mitsubishi Electric MELSEC iQ-R Series User Manual page 210

Precautions
• For a CC-Link IE TSN Class A device, synchronization is not possible using network synchronous communication. (
Page 203 Compatible device)
• For the number of connectable modules or order of connection for CC-Link IE TSN supported devices to be connected,
refer to the following.
Page 26 CC-Link IE TSN SYSTEM CONFIGURATION
• To specify the CC-Link IE TSN Plus module as the target module for the inter-module synchronization, mount it to the main
base unit.
• When a local station is specified as the target module for the inter-module synchronization, the master station cannot be set
as the target module.
• When multiple CC-Link IE TSN Plus modules (master stations) are specified as the target modules for synchronization on
the same base unit, set the slot number of the leftmost one for "Mounting Slot No" under "Inter-module Synchronization
Master Setting" in "System parameter".
• In a multiple CPU system configuration, only the CC-Link IE TSN Plus module controlled by the CPU No.1 can be specified
as the target for the inter-module synchronization.
• Set the same cycle for "Fixed Scan Interval Setting of Inter-module Synchronization" in "System Parameter" and
"Communication Period Interval Setting" in "Basic Settings" of the module parameter.
• As shown in the figure below, networks after the first local station cannot be synchronized.
Master station Local station
• To use a switching hub, refer to the CC-Link Partner Association website (www.cc-link.org) for the models and usage
methods of supported switching hubs.
• Do not set "Not set" for "0.05ms Unit Setting" of "Inter-module Synchronization Setting" in "System Parameter". Select "Set"
for "0.05ms Unit Setting", and set a value in the range 0.25 to 10.0ms (in units of 0.05ms).
• When a switching hub is used, the local station may detect an error at start-up the system. In such a case, take corrective
actions according to the error code.
• Do not perform the online change in the CPU module. If the online change is used in the CPU module, there may be a
delay in the start of the inter-module synchronous interrupt program (I44) in the interrupt program. In this case, the total
value of the execution time of the inter-module synchronous interrupt program (I44) and the cyclic processing time exceeds
the next inter-module synchronization cycle (next communication cycle), and the inter-module synchronous transmission
omission occurs. The watchdog counter also detects an error because cyclic transmission cannot be performed within the
communication cycle.
9 FUNCTIONS
208
9.7 CC-Link IE TSN Network Synchronous Communication Function
Master station Local station