Chapter 12 Description of Parameter Settings
ME300
Display the Frequency Command Executed by the External Terminal
Default: Read only
Settings 0.00–599.00 Hz (Read only)
When you set the source of the Frequency command as the external terminal, if Lv or Fault occurs,
the external terminal Frequency command is saved in this parameter.
Preheating output current level
This parameter controls the level of the preheating DC current input to the motor. The percentage
of the preheating DC current equals to the percentage of motor rated current (Pr.05-01).
Therefore, when you set this parameter, increase the level slowly to reach the desired preheating
temperature.
Related parameters: Pr.02-73 Preheating DC Current Duty Cycle, Pr.02-13 and 16 Multi-function
Output Relay 69: Indication of Preheating Function, Pr.02-01–05 Multi-function Input Terminal 69:
Auto-activate preheating function.
This parameter is to set up the duty cycle of the preheating DC current input to the motor. 0–
100% corresponds to 0–10 sec. If the setting is 0%, there is no output current from the motor
drive. If the setting is 100%, there is continuous output DC current. For example, when the setting
of this parameter is 50%, the cycle time is the time spent to input current to motor for 5 seconds
and stop inputting for 5 seconds. When MI #69 is enabled, this parameter operates periodically
with MI #69 until the motor drive starts to run the motor or until MI # 69 is disabled.
Preheating function works only when the setting value for Pr.02-72 and Pr.02-73 are not 0.
When MI = 69 (auto-activate preheating function) is enabled, MI = 69 controls the start and stop
of preheating function.
When MI = 69 is DISABLED, the preheating function starts after:
The motor drive stops its first operation. The motor drive cycles the power.
The figure below shows the timing relationship when MI = 69 auto-activate preheating function is
enabled and when preheating DC current is enabled and cycle time is 50%.
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