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80
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Troubleshooting
Parameter values change to the former value.
Category
Parameter
Causes
Parameter values are not down-
loaded into EEPROM before
power off.
Countermeasures
See "Parameter Setting" chapter (page 52).
Category
Wiring
Causes
T h e c o m m u n i c a t i o n c a b l e
(RS232C) is connected to CN
NET.
Countermeasures
The communication cable (RS232C) must be con-
nected to CN SER.
In PANATERM, a message "communication port or driver cannot
be detected" appears.
Category
Parameter
Adjustment
Causes
The velocity command input gain
is not correct.
The position loop gain is too
small.
The scale is not appropriate.
Countermeasures
Check that the value of Pr50 (velocity command in-
put gain) is 500 (i.e. 3000rpm/6V).
Adjust the value of Pr10 (position loop gain) to ap-
proximately 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.
The motor speed does not increase up to the specified value.
The speed (movement) is too large or small.
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