Troubleshooting; Inspecting The Display On Parameter Unit And Led2 (Mns) Status Led On The E5Nd 73 - Mitsubishi Electric DeviceNet FR-E5ND Instruction Manual

8. TROUBLESHOOTING

If a fault occurs and the inverter fails to operate properly, locate the cause of the fault and take proper corrective action by
referring to the troubleshooting below. If the corresponding information is not found in the table, the inverter has a problem, or
the component parts are damaged, contact the nearest service representative.
8.1 Inspecting the Display On Parameter Unit and LED2 (MNS) Status LED On the E5ND
In response to the occurrence of a fault, the display unit of the inverter automatically displays the code of the detected fault
and LED2 (MNS) Status LED on E5ND shows the status of the detected fault.
Display
E520S/E540 LED (MNS) On E5ND
E.OPT Blinking Red
0.00 Off
0.00 Red
Note: It should be noted that the EPR setting refers to the EPR set by the DeviceNet master.
Possible
Cause
Connection time-out,
Master designated E5ND
for communication, but
sent no msgs within time
limit = 4 × EPR.
No good contact between
E500 and E5ND.
Duplicate station number,
Network power off,
Network cable offline;
E5ND is only node, not
even a Master is present.
Network is damaged.
73
TROUBLESHOOTING
Check
Host station has not been
disconnected from
network.
E5ND was not plugged in
firmly.
No duplicate station
numbers;
Network power on;
No damage to network;
All cables are in proper
connection;
Master is on network.
Corrective Action
Reset the Inverter.
Reconnect the network.
Master is up and running.
Master sends message(s)
within time limit.
Follow the instructions in
Section 2, plug in E5ND
firmly.
Check required items in
left box,
Reset the Inverter,
Reset the network.