Kikusui PLZ1004W, Руководство пользователя, Страница: 152 / 216

6-66 Applied Operation PLZ-4W
6.10.3 Alarms during Parallel Operation
When an alarm occurs during parallel operation, an error message is displayed, and
the load of all units is turned off.
If an alarm occurs on a slave unit, “ALARM EXTERNAL” is displayed on the mas-
ter unit.
Clear the alarm on the master unit.
6.10.4 Response Speed during Parallel Operation
You can change the response speed in CC mode (CC+CV mode) and CR mode
(CR+CV mode).
In some cases, the wire inductance increases and a large voltage drop occurs due to
changes in the current or the phase lag of the current may cause instability in the
PLZ-4W control inducing oscillation.
In such case, you can decrease the response speed to assure stable operation.
During parallel operation, the response speed of the master unit is used.
When the electronic load unit is assigned as a master unit in parallel operation with
response speed is set at 1/1, the setting of response speed will change to be set at 1/2
in order to secure the stable operation. It is possible to be reset to 1/1 by the menu
setting, please refer to the “Technical Note for the PLZ-4W, When operating under
parallel operation or high-speed load simulations” as provided as separate sheet and
wire the load cable followed by the instruction.
•
For a description of response speed, see section 5.15, “Response Speed.”
6.10.5 Slew Rate during Parallel Operation
During parallel operation, the slew rate of the master unit is used.
6.10.6 Canceling the Parallel Operation
To switch from parallel operation back to standalone operation, turn off the power of
each unit and remove the flat cables.
To set the slave units back to standalone operation, set the Operation item back to
MASTER from the menu.
On the master unit to which load boosters were connected, set the number of load
boosters in the menu to -, and power cycle the unit.