Omron NJ101-10 Series, User Manual

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5-5-2
EtherCAT Slave Enable/Disable Settings
You can temporarily stop and start process data communications with a specified EtherCAT slave with-
out stopping the entire communications system. When an EtherCAT slave is disabled, only message
communications can be performed. Use the Sysmac Studio or the instruction in the user program to
enable or disable EtherCAT slaves.
Version Information
A CPU Unit with unit version 1.04 or later and Sysmac Studio version 1.05 or higher are re-
quired to disable EtherCAT slaves with the special instruction.
Precautions for Correct Use
• If an EtherCAT slave is enabled with the EC_ChangeEnableSetting (Enable/Disable Ether-
CAT Slave) instruction, check the element of the EtherCAT slave that will be enabled is TRUE
in the
_EC_EntrySlavTbl[] (Network Connected Slave Table) system-defined variable.
• If the cable redundancy setting is enabled, you cannot use the EC_ChangeEnableSetting
(Enable/Disable EtherCAT Slave) instruction to enable or disable the EtherCAT slave in the
ring topology. You can set to enable or disable EtherCAT slaves from the Sysmac Studio.

Relation between EtherCAT Slave Status and Enable/Disable Instruction
Settings
The following table gives the results after instruction execution with the EC_ChangeEnableSetting
(Enable/Disable EtherCAT Slave) instruction for the EtherCAT slave status.
EtherCAT slave status
before instruction exe-
cution
Instruction setting
Result after instruction execution
Instruction execution
result
EtherCAT slave ena-
bled/disabled status
Enable Enable Normal end Enabled (not changed)
Disable Disabled
Disabled with physical
slaves Enable Enabled
Disable Disabled (not changed)
Disabled with no physical
slave Enable Error end Disabled (not changed)
Disable
Enable with disconnect-
ed
*1
Enable Enabled (not changed)
Disable
*1. You cannot use the instruction to disable or enable the slave if it is disconnected or in an error state.
Execute a reconnection command or an error reset to the slave before you execute the instruction.
Precautions for Correct Use
If you use the special instruction to change the enable/disable setting of a slave, turning OFF
the power supply to the master will discard the change and revert the setting to those set from
Sysmac Studio. To retain the changed setting, you must change the setting from the Sysmac
Studio and then transfer the network configuration information to the CPU Unit.

Relation between Changes in the Enable/Disable Setting and I/O Opera-
tions
The I/O operations that occur for changes in the enable/disable settings of an EtherCAT slave are
given in the following table.
5 Setting Up EtherCAT Communications with the Sysmac Studio
5-25
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
5-5 EtherCA
T Slave Parameter Settings
5
5-5-2
EtherCA
T Slave Enable/Disable Settings