Omron NX701-17 Series User Manual page 246

9 Troubleshooting
Reconnecting Slaves
When reconnecting disconnected slaves after replacement or inspection, make sure that the following
conditions are met and then reconnect them. If they are reconnected without meeting following condi-
tions, process data communications with the slaves will not start again, and a network configuration
verification error will occur. If the conditions are met, _EC_EntrySlavTbl will be TRUE.
• Make sure that the slave's node address is set correctly.
• Make sure that there are no errors in the order that the slaves are connected.
There are no restrictions on the order when reconnecting slaves that are in a daisy chain. For example,
even if slaves (1) to (3) in a configuration such as the one shown in the following figure are discon-
nected, there are no restriction on the reconnection order of slaves (1) to (3). (For example, the slaves
can be reconnected in the order (3), (2), (1) or (1), (3), (2).)
Disconnected
slaves
The status of the system-defined variables for disconnected slaves that have been successfully recon-
nected are listed in the following table.
System-defined variable name
_EC_RegSlavTbl[] (Registered Slave
Table)
_EC_EntrySlavTbl[] (Network Con-
nected Slave Table)
_EC_MBXSlavTbl[] (Message Commu-
nications Enabled Slave Table)
_EC_PDSlavTbl[] (Process Data Com-
municating Slave Table)
_EC_DisconnSlavTbl[] (Disconnected
Slave Table)
9-76
Junction Slave
(1)
(2)
(3)
This variable shows the slaves that are regis-
tered in the network configuration information.
This variable shows the slaves that are regis-
tered in the network configuration information
and connected to the network.
This variable shows the slaves that are regis-
tered in the network configuration information
and able to perform message communications.
This variable shows the slaves that are regis-
tered in the network configuration information
and performing process data communications.
This variable shows the slaves that are regis-
tered in the network configuration information
and disconnected from the network.
Description
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
Value
Remains TRUE.
Shows actual network configu-
ration (changes to FALSE for
disconnection and to TRUE for
connection).
The corresponding element
changes to TRUE after the Eth-
erCAT slave is connected from
the Sysmac Studio or with an
instruction
The corresponding element
changes to TRUE after the Eth-
erCAT slave is connected from
the Sysmac Studio or with an
instruction
The corresponding element
changes to FALSE after the Eth-
erCAT Slave is disconnected
from the Sysmac Studio or with
an instruction.