Parameters and firmware blocks
176
Group 47 VOLTAGE CTRL
Settings for overvoltage and undervoltage control, and supply voltage.
47
47 VOLTAGE CTRL
Firmware block:
VOLTAGE CTRL
(47)
This block
• enables/disables overvoltage and
undervoltage control
• enables/disables automatic
identification of supply voltage
• provides a parameter for manual
definition of supply voltage
• shows the supply voltage value
used by the control program.
Block outputs located in other
parameter groups
1.19 USED SUPPLY VOLT (page 78)
47.01 OVERVOLTAGE CTRL FW block: VOLTAGE CTRL (see above)
Enables the overvoltage control of the intermediate DC link. Fast braking of a high inertia load causes
the voltage to rise to the overvoltage control limit. To prevent the DC voltage from exceeding the limit,
the overvoltage controller automatically decreases the braking torque.
Note: If a brake chopper and resistor or a regenerative supply section are included in the drive, the
controller must be disabled.
(0) DISABLE Overvoltage control disabled.
(1) ENABLE Overvoltage control enabled.
47.02 UNDERVOLT CTRL FW block: VOLTAGE CTRL (see above)
Enables the undervoltage control of the intermediate DC link. If the DC voltage drops due to input
power cut off, the undervoltage controller will automatically decrease the motor torque in order to keep
the voltage above the lower limit. By decreasing the motor torque, the inertia of the load will cause
regeneration back to the drive, keeping the DC link charged and preventing an undervoltage trip until
the motor coasts to stop. This will act as a power-loss ride-through functionality in systems with high
inertia, such as a centrifuge or a fan.
(0) DISABLE Undervoltage control disabled.
(1) ENABLE Undervoltage control enabled.
47.03 SUPPLVOLTAUTO-ID FW block: VOLTAGE CTRL (see above)
Enables the auto-identification of the supply voltage.
(0) DISABLE Auto-identification of supply voltage disabled.
(1) ENABLE Auto-identification of supply voltage enabled.
VOLTAGE CTRL
34
TLF11 10 msec (1)
47.01 OVERVOLTAGE CTRL
[ Enable ]
47.02 UNDERVOLT CTRL
[ Enable ]
47.03 SUP PLVOLTAUTO-ID
[ Enable ]
47.04 SUPPLY VOLTAGE
[ 400.0 V ]
1.19 USED SUPPLY VOLT
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