Instruction manual

CHAPTER 4 Troubleshooting Guide
4 - 2
4. Troubleshooting Guide
4.1 If the Servo Drive Cannot Be Connected
If the servo drive cannot be connected, proceed as directed below.
Probable cause Remedy
A wrong connector is used for connecting the servo
drive to the personal computer.
Check the connector and use a correct connector.
The connection cable is improperly connected or in
poor contact.
Check to ensure that the cable is properly
connected and in proper contact.
The servo drive differs from the personal computer in
baud rate or other communication setting.
Check the baud rate and other communication
settings. Correct the personal computer or servo
drive settings as needed.
The RS-232C port (COM) is improperly set.
(Personal computer setting check --- Choose [Start],
[Settings], [Control Panel], [System], [Device
Manager] and then check the COM port setting.)
Note the personal computer's COM port setting for
AHF, and then adjust AHF's "Communication
Format" setting until it agrees with the personal
computer's setting.
4.2 If Parameters Cannot Be Written
If the above message appears, proceed as directed below because it is conceivable that
the problem cause is as indicated below:
Probable cause Remedy
An attempt was made to rewrite a write-protected
parameter while an operation was performed with the
SON terminal turned on.
Turn off the SON terminal and write a parameter.
An attempt was made to write parameter data that
was outside the acceptable parameter range.
Write data that is within the acceptable parameter
range.
An attempt was made to write data while the servo
drive was tripped.
Reset the trip with the RS terminal and then write
data.
4.3 If Parameters Cannot Be Read
If the parameters can not be read from the servo drive, proceed as directed below
because it is conceivable that the problem cause is as indicated below:
Probable cause Remedy
An attempt was made to read data while the
communication cable between servo drive and PC
was break or the connector of the cable is not
connected to PC and the servo drive firmly.
Check the communication cable and connect it to
PC and the servo drive again.