YASKAWA SGD7S-1R9D Product Manual page 592

17.1 Interpreting Panel Displays
17.1.6 EtherCAT Communications Indicators
Link/Activity
The Link/Activity indicators show whether Communications Cables are connected to the CN6A and
CN6B connectors and whether communications are active.
Status
Off
Flickering
On
17-4
Indicator
Pattern
Never lit.
50 ms
On
Off
Always lit.
Description
A Communications Cable is not connected and
the EtherCAT (CoE) controller is not running.
Data communications are in progress.
A Communications Cable is connected, but data
communications are not being performed.