Omron NJ101-10 Series, Руководство пользователя

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Precautions for Correct Use
• You can select whether the master continues or stops communications with all slaves when a
communications error occurs. Refer to 5-4 EtherCAT Master Parameter Settings on page
5-14 for details.
• If noise occurs or an EtherCAT slave is disconnected from the network, any current communi-
cations frames may be lost. If frames are lost, slave I/O data is not communicated, and unin-
tended operation may occur. The slave outputs behave according to the slave specifications.
For details, refer to relevant manuals for each slave. If a noise countermeasure or slave re-
placement is required, perform the following processing.
• Program the
_EC_InDataInvalid (Input Data Invalid), _EC_InData1Invalid (Input Data 1 In-
valid), or _EC_InData2Invalid (Input Data 2 Invalid) system-defined variable as an interlock
condition in the user program. Refer to 6-1-3 Checking Validity of Process Data on page
6-6.
• Set the PDO communications timeout detection count setting in the EtherCAT master
to at least 2. Refer to 5-4 EtherCAT Master Parameter Settings on page 5-14 for the setting
procedure.
• If a communications error prevents the slaves from receiving signals from the master, the
slave outputs are processed according to settings in the slave. During the time to change
from normal operation to a communications error status, frames will be lost. The outputs for
lost frames are different for synced slaves (Servo Drives and encoders) and non-synced
slaves. The outputs from synced slaves are processed according to settings in the slaves.
The previous values are retained for the slave outputs for non-synced slaves.
Communications status with
master
Normal operation Frames lost
Communications
error status
Outputs from synced slaves
(Servo Drives and encoders) Controlled by the
values of device var-
iables. Controlled by the
slave settings. Controlled by the
slave settings.
Outputs from non-synced
slaves Controlled by the
values of device var-
iables. The previous values
are output. Controlled by the
slave settings.
For details, refer to relevant manuals for each slave.
Additional Information
You can read the status of the _EC_PDSlavTbl (Process Data Communicating Slave Table)
system-defined variables from the user program to see if I/O refreshing is normal.
6 Process Data Communications and SDO Communications
6-18
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)