6-15
6 Process Data Communications and SDO Communications
NJ/NX-series CPU Unit Built-in EtherCAT Port User’s Manual (W505)
6-1 Process Data Communications (PDO Communications)
6
6-1-4 System Response Time in Process Data Communications
2
The transmission delay times for PDO communications cycle 1 and PDO communications cycle
2 are displayed in the Output Tab Page.
The transmission delay times of the EtherCAT master depend on the periodic tasks of the CPU
Units that refresh I/O with the EtherCAT slaves, as shown below.
Precautions for Correct UsePrecautions for Correct Use
• Sysmac Studio does not support the transmission delay time display function for the built-in
EtherCAT ports of the NJ-series CPU Units.
• You can use the Sysmac Studio to calculate and display the transmission delay times of the
EtherCAT master according to the configuration information such as the number of EtherCAT
slaves and the EtherCAT frame lengths. When you changed the EtherCAT configurations or
setup, you must perform this function again.
Sysmac Studio version 1.13 or higher is required to use the transmission delay time display func-
tion for the EtherCAT master.
Periodic task of the CPU Unit
in which I/O is refreshed
Applicable transmission delay time
of the EtherCAT master
Primary periodic task Transmission delay time for PDO communica-
tions cycle 1
Priority-5 periodic task Transmission delay time for PDO communica-
tions cycle 2
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