Inverter-To-Inverter Link Function - Mitsubishi Electric FR-E800 Instruction Manual (Communication

2.14

Inverter-to-inverter link function

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
1124
Station number in inverter-
*1
to-inverter link
N681
Number of inverters in
1125
inverter-to-inverter link
*1
N682
system
*1 The setting is applied after an inverter reset or next power-ON.
 Communication specifications
The communication specification varies depending on the specification of the master.
Item
Transmission speed
Number of connectable units
Topology
Maximum number of links per
station
 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.
NOTE
• 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 greater 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 details of
the LNK signal, refer to the FR-E800 Instruction Manual (Function).)
• 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.
 System configuration
The following shows the system configuration for using the inverter-to-inverter link function. The master inverter can
communicate with the slave inverters through one or two hubs (refer to the description of Pr.1124 for the master/slave setting).
Initial
Setting range
value
0 to 5
9999
9999
2 2 to 6
100 Mbps
Master: 1
Slave: up to 5
Line, star, or a combination of line and star
Output device 16 (2 bytes)
Special register 8 (16 bytes)
Description
Set the station number for the inverter-to-inverter link function.
Inverter-to-inverter link function disabled
Set the total number of inverters used for the inverter-to-inverter
link function.
Description
2.14 Inverter-to-inverter link function
169
2. Ethernet Communication
1
2
3
4
5
6
7
8
9
10