Mitsubishi Electric 800 Series Instruction Manual page 248

 Emergency drive execution sequence
• When X84 signal is ON for 3 s, the emergency drive is executed.
• Y65 signal turns ON during emergency drive operation.
• "ED" appears on the operation panel during emergency drive operation.
• 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 Pr.523 ≠ "9999"
parameter settings Pr.524 ≠ "9999" (Setting is not required when Pr.523 = "100, 200, 300, or 400".)
Contradictory condition None of the following conditions are satisfied.
• Enabling the electronic bypass sequence function
• During offline auto tuning
• Supplying power through terminals R1 and S1
• 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.)
Condition
5.7 (H) Protective function parameter
3
4
5
5
5
6
7
8
9
10
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5. PARAMETERS