Fuji Electric FRENIC-VG Series, User Manual

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6.6 High-Speed Serial Communication-Capable Terminal Block
6-147
Chap. 6
CO
NTR
O
L O
P
TIONS
6.6.11 Running with reduced number of units
When running with reduced number of units, realize the following setup.
1) Realize the setup in "Table 6.6.19" below for X terminal input (Di) and Y terminal output (Do).
Table 6.6.19
Required X Terminal Functions for Operation with Reduced Number of Units
Specified value / Setup name Explanation of use in Operation with Reduced Number of Units
Di 57 [MT-CCL]
Cancel multiplex system Release direct parallel connection when turned ON. The system will be
able to run on one independent inverter (independent operation).
When running independently on either of the two units, assign this
function to both of the units.
12 [M-CH2]
Select motor 2 When running on a single unit, the second motor constant can be selected
and run without changing the constants in motor 1.
49 [PG-CCL]
Cancel PG alarm
75 [NTC-CCL]
Cancel NTC thermistor alarm
Alarm is temporarily cancelled for PG routing and NTC thermistor routing
disconnection detecting function while preparing for operation with
reduced number of units.
However, if record of these two alarms does not cause a problem, this
function does not have to be used. In this case, reset the alarm when
running again.
4 [RT1]
Select ASR and ACC/DEC
time When running on a single unit using ASR constants (acceleration and
deceleration times and ASR 1 hour P gain), the load inertia may be too
large. This can cause overload alarm to trip. Avoid the overload trip by
selecting the second ASR.
Using the torque restriction (torque current restriction) is also effective.
Do 00 [RUN]
Inverter running
Signal signifies that the inverter is running.
During direct parallel connection operation, the motor running signal while
the master inverter is running is output.
Specifications are the same for single unit operation, with its own inverter
outputting signal during operation.
16 [SW-M2]
Motor M2 selected The second motor selection signal is input, and the signal for transfer
complete to the second motor constants inside the inverter is output.
Perform the steps in the following order.
Select
Operation with
reduced number
of units
MT-CCL=ON
PG-CCL=ON
NTC-CCL=ON
M-CH2=ON
Preparation for operation
with reduced number of
units complete
START
Coast to a stop
SW-M2
PG-CCL=OFF
NTC-CCL=OFF
Yes
Yes (Second motor
selection complete)
Figure 6.6.12 Switching Flowchart for Operation with Reduced Number of Units