NSK MEGATORQUE MOTOR SYSTEM - Alarm and Warning Management; Cause and Remedy of Alarm and Warning; C4: Fieldbus Error

4. Alarm and Warning
— 4-1 —
4. Alarm and Warning
4.1. Cause and Remedy of Alarm and Warning
4.1.1. C4: Fieldbus Error
 The Driver Unit gives the alarm if an error in the built-in CC-Link interface unit occurred and
disabled continuous communication.
◊ The alarm does not report an abnormality of the whole fieldbus.
Table 4-1: Status when an error in the fieldbus is detected
７ seg
LED
Command TA:
Tell Alarm Status
Warning/Alarm Motor state
DRDY
output
WRN
output
OTPA
OTMA
output
History Clear
C4
C4>Fieldbus Error
Fieldbus error Servo off 0
－ －
○
×
 The table below shows the history of alarm occurence read out by the command TA/HI (Tell
alarm history) and their remedy.
Table 4-2: Cause and remedy of fieldbus error
Alarm history Cause Remedy
C4-0 Two slave stations are not connected
C4-1
Error in verifying the manufacturer code
C4-2
Error in verifying machine code and/or
software version
C4-3
Busy for writing the data
C4-4
Time over agaisnt the setting
• The Driver Unit may be defective if the alarm occurs again after the reboot
of the system. Follow the “Appendix 4: Procedure manual for replacing the
EDC Driver Unit Raplacing” of the instruction manual.