Epson RC620 Manual page 151

this manual. Only in this troubleshooting section, general names of the status display of
the DeviceNet device are used.
The Module/NetWork LED is referred to as the Network Status (NS) in this section.
The IO LED is referred to as the Module Status LED (MS) in this section.
4.1.1.2 Check Network Status
(1) Master Status: MS/NS LEDs
(2) Node Number of Absent Slaves
Absent slaves are disconnected from or not added to the network.
(3) Absent Slave Status: MS/NS LEDs
(4) Physical Node Location of Absent Slave
Communications
Power Supply
A communication time out error occurred.
(5) Error Occurrence Condition
 Immediate occurrence (high reproducibility)
 Rare occurrence (low reproducibility)
RC620 Option Fieldbus I/O Rev.8
LED
MS (Module Status)
NS (Network Status)
1. See the status flag regarding to the removal and addition if the master has status
information.
2. See the MS/NE LEDs of all slaves if the master has no status information.
LED
MS (Module Status)
NS (Network Status)
Master PLC
Branch Tap
Terminating
Resistor
Color
 Green  Red
 Green  Red
Color
 Green  Red
 Green  Red
Branch Tap
Slave
Slave
Slave
4. Troubleshooting (DeviceNet)
Light Condition
 ON  Blinking  OFF
 ON  Blinking  OFF
Light Condition
 ON  Blinking
 ON  Blinking
Slave Slave
Start the examination from this block
when the error occurred here.
 OFF
 OFF
Terminating
Resistor
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