Mitsubishi Electric FR-A820-04750-GF Instruction Manual page 90

 Emergency drive execution sequence
• When the X84 signal is ON for 3 seconds, the emergency drive is activated.
• The Y65 signal turns ON during emergency drive operation.
• "ED" appears on the operation panel during emergency drive operation.
• The ALM3 signal turns ON when a fault occurs during emergency drive operation.
• To activate the emergency drive, the X84 signal needs to be ON for three seconds while all the following
conditions are satisfied.
Item
Emergency drive
parameter settings
Control method
Contradictory condition
• When the "retry" (Pr.523 = "2[][], 3[][]") is selected, it is recommended to use the automatic restart after
instantaneous power failure function at the same time.
• Parameter setting is not available during emergency drive operation.
• To return to the normal operation during emergency drive operation, do the following. (The operation will not be
returned to normal only by turning OFF the X84 signal.)
Reset the inverter, or turn the power supply OFF.
Clear a fault by turning ON the X51 signal while the sequence function is enabled (when the protective function
is activated).
• The operation is switched over to the commercial power supply operation in case of the following during
emergency drive operation while the commercial mode or the retry / commercial mode is selected.
24 V external power supply operation, power failure status or operation with the power supplied through R1/S1
(except when the DC feeding mode 1 or 2 is selected), undervoltage
• To input the X84 signal, set "84" in any of Pr.178 to Pr.189 (Input terminal function selection) to assign the
function.
• For the terminal used for the Y65 signal output, assign the function by setting "65 (positive logic)" or "165
(negative logic)" in any of Pr.190 to Pr.196 (Output terminal function selection). For the terminal used for the
ALM3 signal output, assign the function by setting "66 (positive logic)" or "166 (negative logic)" in any of Pr.190
to Pr.196 (Output terminal function selection).
• The X84 signal input is valid either through the external terminal or via network regardless of the Pr.338 and
Pr.339 settings (Selection of control source in Network operation mode).
• During emergency drive operation, the operation is performed as Pr.502 Stop mode selection at
communication error = "0 (initial value)" and communication errors (such as E.SER) do not occur. (A protective
function is performed according to its operation during emergency drive operation.)
Pr.523 ≠ "9999"
Pr.524 ≠ "9999" (Setting is not required when Pr.523 = "100, 200, 300, or 400".)
Either of the following control methods is selected (when Pr.800 = "9, 10, 20, 109, or 110" or Pr.451
= "10, 20, 110, or 9999")
• V/F control
• Advanced magnetic flux vector control
• Real sensorless vector control (speed control)
• PM sensorless vector control (speed control)
• PM sensorless vector control test operation
None of the following conditions are satisfied.
• Enabling the electronic bypass sequence function
• Enabling the brake sequence function
• Using the FR-A8NS (option)
• During offline auto tuning
• Supplying power through terminals R1 and S1
• Pr.30 = "2, 102"
Condition
3 BCN-C22005-957