Mitsubishi Electric 800 Series Instruction Manual page 250

 Emergency drive operation selection (Pr.523, Pr.524)
• Use Pr.523 Emergency drive mode selection to select the emergency drive operation. Set a value in the hundreds place
to select the operation when a valid protective function is activated (critical fault) during emergency drive. Set values in the
ones and tens places to select the operation method.
Pr.523 Emergency drive operation mode
setting
1[][] Output shutoff mode
2[][] Retry / output shutoff mode
*1 Retry / commercial mode
3[][]
*1 Commercial mode
4[][]
[]00 Normal operation mode
[]11 Fixed Forward rotation
frequency
[]12 Reverse rotation
mode
[]21 PID control Forward rotation
mode
[]22 Reverse rotation
[]23 Forward rotation
(Second PID
measured value input)
[]24 Reverse rotation
(Second PID
measured value input)
9999 Emergency drive disabled
*1 Under PM motor control, the operation is not switched over to the commercial power supply operation the output is shut off.
NOTE
• The operation is automatically switched from the PU operation mode or External/PU combined operation mode to the
External operation mode when the emergency drive is activated in the fixed frequency mode or in the PID control mode.
 Retry operation during emergency drive (Pr.515, Pr.514)
• Set the retry operation during emergency drive operation. Use Pr.515 Emergency drive dedicated retry count to set the
retry count, and use Pr.514 Emergency drive dedicated retry waiting time to set the retry waiting time.
• The ALM signal output conditions depend on the Pr.67 Number of retries at fault occurrence setting. (Refer to
242.)
• For the protective functions (critical faults) for which a retry is performed during emergency drive operation, refer to
251.
NOTE
• During emergency drive operation, Pr.65 Retry selection is not available.
Selecting operation Output shutoff at a critical fault occurrence.
when a critical fault
Retry operation at a critical fault occurrence.
occurs during
The output is shut off when a critical fault for which retry is not
emergency drive
permitted occurs, or the retry count is exceeded.
operation
Retry operation at a critical fault occurrence.
The operation is switched over to the commercial power supply
operation when a critical fault for which retry is not permitted
occurs, or the retry count is exceeded.
While Pr.515 = "9999", the operation is switched over to the
commercial power supply operation when the retry count
reaches 200.
The operation is switched over to the commercial power supply
operation when a critical fault occurs.
Selecting the operation The operation is performed with the same set frequency and by
method during the same starting command as those in the normal operation.
emergency drive Use this mode to avoid output shutoff due to a fault.
operation
The operation is forcibly performed with the frequency set in
Pr.524.
Even when the motor is stopped, the operation is started by the
emergency drive execution.
The operation is performed under PID control using the Pr.524
setting as a set point. The measured values are input in the
method set in Pr.128.
The operation is performed under PID control using the Pr.524
setting as a set point. The measured values are input in the
method set in Pr.753.
Description
5. PARAMETERS
5.7 (H) Protective function parameter
3
4
5
5
5
6
7
8
9
10
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