9
1
If the communication is set as the operation or speed command source for the inverter operation, a communication error occurs. For the
inverter operation at communication error, refer to
.
Time limit = 4
EPR.
(EPR = Expected Pack Rate Class 0x05 Instance 2 Attribute 9 (Refer to
))
Green (ON)
Connection established
(The inverter power is ON and the
master on the network has
recognized this option unit.
The green LED stays ON during
communication.)
<When the inverter is not running even with the green LED ON>
• Check that the correct data is sent from the master to the I/O communication format
specified in
Pr.346
. (For how to check the data to be sent from the master, refer to the
Instruction Manual of the master device.)
• Check that the inverter is in the NET operation mode,
Pr.338 Communication operation
command source
= "0", or
Pr.550 NET mode operation command source selection
=
"0 or 9999".
Red
(flickering)
I/O communication connection
timeout
Check the EPR (Expected Packet Rate) setting
of the I/O communication of the master
again.
(For how to set the EPR, refer to the Instruction Manual of the master device.)
Check for a DeviceNet cable disconnection, connector contact fault, and misplaced
terminating resistor.
Network power OFF
Review the power supply method for the network so that the power does not turn OFF
again.
Red (ON)
Overlapping node address
Check that the node address is not overlapping with those of other devices.
Incorrect baud rate setting
Set the same baud rate for the inverter (
Pr.346
) and master.
Communication error due to cable
disconnection or intermittent
network power OFF
After connecting a master to an inverter (FR-A8ND) with terminating resistors, check for a
cable disconnection, connector contact fault, and network power supply drop.
LED
indicator
Description
Corrective action
