Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

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Inverter-to-inverter link function (FR-A800-E) Parameters
5 - 832
5.23 Inverter-to-inverter link function (FR-A800-E)
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 invert-
er-to-inverter link" and Pr. 1125 "Number of inverters in inverter-to-inverter link system".
The setting is applied after an inverter reset or power-ON.
Communication specifications
Inverter-to-inverter linkup (LNK) signal
The inverter-to-inverter linkup (LNK) signal is available to check that the master-slave communication
is established.
To use the LNK signal, set "242 (positive logic) or 342 (negative logic)" in any of Pr. 190 to Pr. 196 (Out-
put terminal function selection) to assign the function to the output terminal.
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)
Tab. 5-414: Inverter-to-inverter link function communication specifications
Master/slave Signal ON condition Signal OFF condition
Master
The inverter receives a response from all the
slave inverters during initial communication.
앫
The inverter does not receive a response
from a slave in communication.
앫
The inverter detects a signal loss.
Slave The inverter returns a response to the master.
앫
The inverter does not receive any request
from the master.
앫
The inverter detects a signal loss.
Tab. 5-415: Signal ON/OFF condition for LNK signal
NOTE Changing the terminal assignment using Pr. 190 to Pr. 196 (Output terminal function selection)
may affect the other functions. Set parameters after confirming the function of each terminal.