Problems and Countermeasures
| Master Unit LED | Error | Description [Reference] | |
|---|---|---|---|
| MS | NS | ||
| Green Light ON | Green Light ON | Normal communication | Normal condition |
| Green Light ON | Green Light Blinking | During connection establishment | Processing connection establishment. (The green NS LED will be ON in a few seconds.) Master function in stop state. (When communication does not start, master analysis with NetMeter is required.) |
| Green Light ON | Red Light Blinking | Communication error | See also: Master: Communication Error Slave disconnected from the network (Remote I/O communication error) Slave not added to the network (Scan list collation error) Communications power supply OFF (Error detection after the communication establishment) |
| Green Light ON | Red Light ON | Busoff detection Duplicate MAC ID | See also: Master: Busoff Detection Busoff detection Communication stopped due to critical error. Duplicate MAC ID The MAC ID configuration was duplicated. (This error occurs only during unit start-up) |
| Green Light ON | Light OFF | Unestablished communication | See also: Master Communication Unestablished No slave (Error detection before communication establishment) Communications power supply OFF (Error detection before the communication establishment) Duplicate MAC ID The MAC ID configuration was duplicated. |
| Red Light Blinking | - | Configuration error | Master unit configuration error Refer to the respective device manuals. When Epson RC+ was configured as a master: See also: Master: Configuration Error Slave disconnected from the network (Remote I/O communication error) Slave not added to the network (Scan list collation error) Duplicate MAC ID The MAC ID configuration was duplicated. |
| Red Light ON | - | Module error | Broken master unit → Unit Replacement |
| Light OFF | Green Light Blinking | Absent slave | See also: Absent Slave No slave (Error detection before communication establishment) Communications power supply OFF |
| Light OFF | Light OFF | Network Absent slave | See also: Uninitialized Network Master unit start-up error No slave (Error detection before communication establishment) Communications power supply OFF |
Process Flowchart
* See also: