Mitsubishi Electric FR-A700 Manual page 73

Function Name
Option alarm
Communication option
alarm
Option alarm
Parameter storage device
alarm
PU disconnection
Retry count excess
Parameter storage device
alarm
CPU error
Operation panel power
supply short circuit
RS-485 terminals power
supply short circuit
24VDC power output short
circuit
Output current detection
value excess
Inrush resistor overheat
Communication alarm
(inverter)
Analog input error
Overspeed occurrence
*7
Speed deviation excess
detection
*7
Open cable detection
*7
Position error large
*7
Brake sequence error
Encoder phase error
*7
Internal circuit error
USB error
Opposite rotation
deceleration alarm
*1. Resetting the inverter initializes the internal thermal integrated data of the electronic thermal relay function.
*2. The error message shows an operational error. The inverter output is not shut off.
*3. Warnings are messages given before major failures occur. The inverter output is not shut off.
*4. Minor failure warns the operator of failures with output signals. The inverter output is not shut off.
*5. When major failures occur, the protective functions are activated to shut off the inverter output and output the alarms.
*6. The external thermal operates only when the OH signal is set in Pr.178 to Pr.189 (input terminal function selection).
*7. Appears when the FR-A7AP (option) is fitted.
Appears when torque command by the plug-in option is selected using Pr. 804 when no plug-in
option is mounted or an AC power supply is connected to the R/L1, S/L2, T/L3 when the high
power factor converter and power regeneration common converter connection setting (Pr.30 =2)
is selected.
Appears when a communication line error occurs in the communication option.
Appears if a contact fault or the like of the connector between the inverter and communication
option occurs or if a communication option is fitted to the connector 1 or 2.
(1 to 3 indicate connector numbers for connection of the plug-in option .
Appears when operation of the element where parameters stored became abnormal. (control
board)
Appears when a communication error between the PU and inverter occurred, the communication
interval exceeded the permissible time during the RS-485 communication with the PU connecter,
or communication errors exceeded the number of retries during the RS-485 communication.
Appears when the operation was not restarted within the set number of retries.
Appears when operation of the element where parameters stored became abnormal. (main circuit
board)
Appears during the CPU and peripheral circuit errors occurred.
Appears when the RS-485 terminal power supply or operation panel power supply was shorted.
Appears when terminals PC-SD were shorted.
Appears when output current exceeded the output current detection level set by the parameter.
Appears when the resistor of the inrush current limit circuit overheated.
Appears when a communication error occurred during the RS-485 communication with the RS-
485 terminals.
Appears when 30mA or more is input or a voltage (7.5V or more) is input with the terminal 2/4 set
to current input.
Indicates that the motor speed has exceeded the overspeed setting level (Pr.374).
Stops the inverter output if the motor speed is increased or decreased under the influence of the
load etc. during vector control and cannot be controlled in accordance with the speed command
value.
Stops the inverter output if the encoder signal is shut off.
Indicates that the difference between the position command and position feedback exceeded the
reference.
The inverter output is stopped when a sequence error occurs during use of the brake sequence
function (Pr.278 to Pr.285).
When the rotation command of the inverter differs from the actual motor rotation direction
detected from the encoder, the inverter output is stopped. (detected only during tuning is
performed in the "rotation mode" of offline auto tuning)
Appears when an internal circuit error occurred.
Appears when USB communication error occurred.
The speed may not decelerate during low speed operation if the rotation direction of the speed
command and the estimated speed differ when the rotation is changing from forward to reverse or
from reverse to forward under real sensorless vector control. At this time, the inverter output is
stopped if the rotation direction will not change, causing overload.
Description Display
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