Omron Sysmac NJ Series User Manual page 234

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 the following conditions are met, _EC_EntrySlavTbl
(Network Connected Slave Table) system-defined variable 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.
Additional Information
If slaves are reconnected without meeting above conditions, process data communications with
the slaves will not start again, and a Network Configuration Verification Error (84220000 hex)
event will occur. However, for project unit version 1.40 or later, a Network Configuration
Verification Error (84220000 hex) event will not occur.
There are no restrictions on the order when reconnecting slaves that are in a daisy chain. For exam-
ple, even if slaves (1) to (3) in a configuration such as the one shown in the following figure are dis-
connected, 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
When the disconnected slave is reconnected with an instruction or from the Sysmac Studio, the status
of the system-defined variables for the slaves are listed in the following table.
System-defined variable
_EC_RegSlavTbl[]
(Registered Slave Table)
_EC_EntrySlavTbl[]
(Network Connected Slave Table)
9-36
Junction Slave
(1)
(2)
(3)
This variable shows the slaves that are
registered in the network configuration
information.
This variable shows the slaves that are
registered in the network configuration
information and connected to the net-
work.
Description
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
Value
Remains TRUE.
*1