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3 Configuration Units
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
3-1 CPU Units
3
3-1-3 Operation Status Indicators
Built-in EtherCAT (Port 2) Status Indicators
These indicators show the operation status of the built-in EtherCAT port of the CPU Unit.
These indicators show the operation status of the built-in I/O of the CPU Unit.
The following example shows the status of the contact 01. The display of the I/O contact number lights
or does not light.
Indicator Color Status Meaning
NET RUN Green Lit. EtherCAT communications are in progress.
• Inputs and outputs for I/O data are in operation.
Flashing EtherCAT communications are established.
This indicator shows either of the following conditions.
• Only message communications are in operation.
• Only message communications and I/O data inputs are in opera-
tion.
Not lit. EtherCAT communications are stopped.
• The power supply is OFF or the CPU Unit was reset.
• A MAC address error, communications Controller error, or other
error occurred.
NET ERR Red Lit. A hardware error or unrecoverable error occurred, such as for
exception processing.
Flashing A recoverable error occurred.
Not lit. There are no errors.
LINK/ACT Yellow Lit. A link is established.
Flashing Data communications are in progress after establishing link.
Flashes every time data is sent or received.
Not lit. The link was not established.
Built-in I/O Operation Status Indicators
Indicator Color Status Description
Input
indicator
Yellow Lit. The input contact is ON.
Not lit. The input contact is OFF.
Output
indicator
Yellow Lit. The output contact is ON.
Not lit. The output contact is OFF.
01
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