Fuji Electric FRENIC-VG Series, User Manual

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6.6 High-Speed Serial Communication-Capable Terminal Block
6-121
Chap. 6
CO
NTR
O
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P
TIONS
d
It is possible to eliminate a faulty inverter(s) from the multiplex system and recover the system
quickly without wiring change.
• If some inverters go wrong during operation, the remaining normal ones can restart
(reduced-inverters operation).
• According to the load condition, the number of inverter units to be used can be changed
(reduced-inverters operation).
The reduced-inverters operation has the effect of energy saving by loss reduction during operation.
Note that reducing the inverters without wiring change is possible from 2 units to 1 unit or from 3
units to 1 unit. ("From 3 units to 2 units" is available soon.)
e
Depending upon the machine specifications and load conditions, auto search for idling motor speed or
pull-in operation with the reduced number of inverters is possible from a coast-to-stop state caused by
a trip.
6.6.2 Model and specifications
6.6.2.1 Model
Model elements: OPC-VG1-TBSI
Name of equipped inverter VG1 -> FRENIC-VG
Option name: TBSI -> High-speed serial
communication-capable terminal block
Accessories
Plastic optical fiber cable (with connector) x 1, 5 m
6.6.2.2 Specifications
・
The system will not operate correctly if the function code setting is not correct. Read the instruction below and
set them accordingly.
Table 6.6.1 Communication Specifications
Item Specifications
Data transmission
method Loopback method
Asynchronous serial communication using plastic optical fiber
Transmission rate 2.5 Mbps
Error check method
Hardware: parity, framing, overrun
Software: BCC, timeout monitoring
Transmission distance
When using the plastic optical fiber cable: 5m (0 to 70
°
C)/Inter-inverter
(Contact us if a cable longer than 5m is required.)