Mitsubishi Electric FR-A820-00046 Instruction Manual page 1038

Inverter-to-inverter link function (FR-A800-E)
● Special register (slave)
Device No.
SD1470 to SD1477
SD1478 to SD1485
SD1486 to SD1549
Tab. 5-420: Special registers for the slave inverter
Troubleshooting
Condition
Communication is not
established.
A command sent by the master
is not applied to a slave.
Tab. 5-421: Inverter-to-inverter link troubleshooting
5 - 836
Name
Inverter-to-inverter link receive data 1 to 8
(master)
Inverter-to-inverter link send data 1 to 8
(master)
For manufacturer setting. Do not set.
Possible cause
The same station number is assigned to
multiple inverters.
The station numbers are not consecutive.
The specified number of inverters in the
system is not correct.
(Pr. 1124 is set to a value equal to or larger
than the value set in Pr. 1125.)
The connection is half-duplex.
The inverter is not reset after Pr. 1124 and
Pr. 1125 are set.
The PLC function is disabled.
The same station number is assigned to
multiple inverters.
Parameters
Description
Receive data 1 to 8 from master
Send data 1 to 8 to master
Countermeasure
Set Pr.1124 correctly.
Set Pr. 1124 so that the station numbers are
consecutive.
Set Pr. 1125 correctly.
Use full-duplex connection.
(When Pr. 1426 "Link speed and duplex
mode selection" = "0 (initial value)", check
that the hub and the Ethernet cable are
compatible with full-duplex connection.)
Reset the inverter.
Set a value other than "0" in Pr. 414 to
enable the PLC function.
Set Pr. 1124 correctly.