Inverter-to-inverter link function
72
PARAMETER
2.6 Inverter-to-inverter link function
The setting is applied after an inverter reset or power-ON.
Communication specifications
Setting procedure
1
Set a value other than "0" in Pr.414 PLC function operation selection to enable the PLC
function.
2
To set the inverter as the master, set "0" in Pr.1124 Station number in inverter-to-inverter link,
and to set the inverter as a slave, select a station number from 1 to 5 and set the number in
Pr.1124.
3
Set the total number of inverters used for the inverter-to-inverter link function in Pr.1125
Number of inverters in inverter-to-inverter link system. For example, set "3" in Pr.1125 when
two slave inverters and the master inverter are used.
4
Use FR Configurator2 to write sequence programs to the master inverter.
• Use different station numbers for different devices. (If different devices have the same station number, the communication
cannot be performed properly.
• Set consecutive numbers for the station numbers. (Do not skip any numbers like 1, 2, then 4.)
• When Pr.1124 is set to a value equal to or larger than the value set in Pr.1125, normal communication is not available.
• Use the Inverter-to-inverter linkup (LNK) signal to check that the master-slave communication is established. (For the details
of the LNK signal, refer to page 13.)
• To detect the interruption of the inverter-to-inverter link communication and activate the protective function, set Pr.997 Fault
initiation in advance, and create and execute a sequence program to activate the protective function by the input of the
signal loss detection signal from the external sensor.
• For the details of the PLC function, refer to the PLC Function Programming Manual and the Instruction Manual of FR
Configurator2.
• For the details of FR Configurator2, refer to the Instruction Manual of FR Configurator2.
The inverter-to-inverter link function enables communication between multiple inverters connected by Ethernet in a
small-scale system by using the I/O devices and special registers of the PLC function.
The inverter-to-inverter link function is enabled by simply setting Pr.1124 Station number in inverter-to-inverter link
and Pr.1125 Number of inverters in inverter-to-inverter link system.
Pr. Name
Initial
value
Setting
range
Description
1124
N681
Station number in inverter-to-
inverter link
9999
0 to 5
Set the station number for the inverter-to-inverter
link function.
9999 Inverter-to-inverter link function disabled
1125
N682
Number of inverters in inverter-
to-inverter link system
2 2 to 6
Set the total number of inverters used for the
inverter-to-inverter link function.
Item Description
Transmission speed 100 Mbps (Do not use the function at 10 Mbps.)
Connectable units
Master: 1
Slave: up to 5
Topology Star
Maximum number of links per station
Output device 16 (2 bytes)
Special register 8 (16 bytes)
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