Fuji Electric RHC-D 690V Series, Руководство пользователя

Страница: 140 / 175

(3) Parallel/single system switching
1) Function overview
Parallel system operation with high-speed serial card (OPC-VG7-SI/SIR) can be canceled and switched to
single system operation for a single unit with external digital input signal [OPT-DI].
This switching function is used as an emergency backup in cases where a malfunction occurs at a converter in a
parallel system, and operation is continued at reduced load capacity with a functional converter only.
The function code for parallel system switching is H12 "Parallel system".
The following diagram illustrates basic connection for parallel system and single system switching.
OPC-VG7-SI/SIR
X1 (E01=4)
CM
[OPT-DI]
RST
[RST]
RHC-D
Master
[CM]
OPC-VG7-SI/SIR
(E01=4) X1
CM
RST
RHC-D
Slave
[OPT-DI]
[RST]
[CM]
Optical communication
DC common
2) Parallel/single system switching specifications
Parallel/single system switching is performed with function code H12 and digital input [OPT-DI]. If the X1
terminal is the normal open setting with function code H12 = 1 "parallel system", [OPT-DI] = ON (closed) will
be the single system (parallel system canceled), and [OPT-DI] = OFF (open) will be the parallel system.
Table 9.7-1
Function Code
H12 "Parallel System"
[OPT-DI] Drive System
0: Disabled
OFF Single
ON Single
1: Enabled
OFF Parallel
ON Single
<Precautions>
1. Switching input is disabled during operation, and is not updated until the converter stops.
2. This function is only valid when the system is equipped with a high-speed serial card, and the X1 terminal is
assigned to [OPT-DI].
3. If using this switching function, it is only possible to run a single converter among those that make up the parallel
system. Do not run multiple converters simultaneously with the single system.
4. If using the remaining two systems of a three converter system in parallel system operation when one of the
converters has malfunctioned, it is first necessary to reconfigure the system as a two converter system by making
changes to the optic fiber cable wiring, changing the station address switch settings on the option card, and
resetting the function code.
9-47