Panasonic minas a series Operating Manual page 81

Troubleshooting
The motor speed does not increase up to the specified value.
The speed (movement) is too large or small.
Category
Parameter The velocity command input gain is
not correct.
Adjustment The position loop gain is too small.
The scale is not appropriate.
Parameter values change to the former value.
Category
Parameter Parameter values are not downloaded
into EEPROM before power off.
In PANATERM, a message "communication port or driver cannot be detected"
appears.
Category
Wiring The communication cable (RS232C)
is connected to CN NET.
Causes
Check that the value of Pr50 (velocity command input gain)
is 500 (i.e. 3000rpm/6V).
Adjust the value of Pr10 (position loop gain) to approximately
100.
Correct the values of Pr46 (numerator of 1st command pulse
ratio), Pr4A (Multiplier of numerator of command pulse radio)
and Pr4B (denominator of pulse command scale). See "Details
of Parameters" chapter.
Causes
See "Parameter Setting" chapter (page 52).
Causes
The communication cable (RS232C) must be connected to
CN SER.
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Countermeasures
Countermeasures
Countermeasures