11.10 Compact Power Regeneration PWM Converter
11-51
SELECTING PERIPHERAL EQUIPMENT
■ Protection and early warning functions
This function is activated if the AC current instantaneous value exceeds the overcurrent detection
level such as when a power supply circuit short circuit or ground fault occurs.
This function is activated if the AC power supply voltage drops to the undervoltage detection level or
below during converter operation. However, no alarm is output when "F02: Restart mode after
momentary power failure (mode selection)" data is set to 1 (Operation).
This function is activated if the AC power supply voltage exceeds the AC overvoltage detection level.
This function is activated at such times as when regenerative current from the inverter increases
(regenerative energy exceeds braking capability), and the main circuit intermediate voltage exceeds
the DC overvoltage detection level.
This function is activated if the intermediate DC voltage drops to the insufficient voltage detection level
or below due to such reasons as a drop in the power supply voltage during converter operation.
However, no alarm is output when "F02: Restart mode after momentary power failure (mode
selection)" data is set to 1 (Operation).
This function is activated when the power is turned on, and if there is a phase interruption at the three-
phase power supply connected to main circuit main power supply input terminals R, S, and T, or if the
three-phase power supply voltage is unbalanced, an alarm stop will occur at the converter. It is
necessary to turn the power OFF and ON again to reset the alarm.
Synchronous power
supply
frequency error
This function is activated when the power supply frequency detection value lies outside the range.
However, no alarm is output when "F02: Restart mode after momentary power failure (mode
selection)" data is set to 1 (Operation).
This function is activated when the temperature around the cooling fins used to cool main circuit
semiconductor devices rises due to such reasons as cooling fan stoppage.
A converter alarm stoppage occurs when an external signal is input (THR).
Converter internal
overheat
This function is activated when the temperature around the PCBs rises due to reasons such as poor
ventilation inside the converter.
This function is activated if the AC power supply current exceeds the converter overload level.
Converter overload detection level (150%/60 s)
This function is activated if a memory error such as a data write error occurs.
Keypad communication
error
This function is activated if a keypad transfer error occurs.
This function is activated if a CPU error occurs.
This alarm is triggered when a transmission abnormality such as noise occurs while the converter is
running with RS-485 communication. It is most likely caused by a PLC device error or communication
line disconnection.
This function is activated only when "73 answerback [73ANS]” is selected using X1/X2 function
selection. There is no X1/X2 input (that is, the electromagnetic contactor for bypassing the charging
circuit is closed) within 0.5 sec after the converter charging circuit control output (73A) signal is
issued. To reset the alarm, change the X1/X2 function selection, or turn the power OFF and back ON
again.
The converter external AC fuse blows due to shorting or damage to the internal circuit.
This alarm is issued when the difference between the converter current command value and input AC
current detection value exceeds the input current error detection level. However, no alarm is output
when "F02: Restart mode after momentary power failure (mode selection)" data is set to 1
(Operation).
This alarm is issued when the DC fan stops. (75 kW models only)
However, no alarm is output when "H28: Light alarm target definition" data is set to 1 (disable).
To Next Page
Loading...
