6 Process Data Communications and SDO Communications
6-28
NJ/NX-series CPU Unit Built-in EtherCAT Port User’s Manual (W505)
“Enable/disable,” “Connected/disconnected,” and “physical slave/no physical slave” are defined
as follows:
• Enable/Disable Setting
This setting tells whether process data communications are performed for an EtherCAT slave.
You can make this setting from the Sysmac Studio and you can change the setting with the
EC_ChangeEnableSetting (Enable/Disable EtherCAT Slave) instruction.
• Connected/Disconnected Setting
This setting is used to temporarily disconnect a slave from the network when the slave is
replaced and then to connect the slave to the network again.
However, if an EtherCAT slave in a daisy-chain connection is disconnected, all of the slaves
that are connected after it are disconnected. This point is different from the enable/disable set-
ting.
• Physical Slave/No Physical Slave
This indicates whether the EtherCAT slave is physically connected.
The following table shows how these states combine.
Enable/disable setting
Connected/discon-
nected setting
Physical slave/no
physical slave
Combined state
Enabled Connected Present Present
Not installed None
(You cannot connect a
non-exiting slave to the
network.)
Disconnected Present Present
Not installed
Disabled ---
(The concept of con-
nected/disconnected
does not apply if a slave
is disabled.)
Present Present
Not installed
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