
3. TROUBLESHOOTING AND
B-65235EN/02 TROUBLESHOOTING AND RECOVERY RECOVERY PROCEDURES
- 75 -
3.3.7
Rotation Speed Data Error Alarm
Serial pulse coder A
#7 #6 #5 #4 #3 #2 #1 #0
(See Subsec. 3.3.1)
RCAL (#3) A rotation speed data error alarm occurred.
α pulse coder
#7 #6 #5 #4 #3 #2 #1 #0
Alarm 1 FBAL
#7 #6 #5 #4 #3 #2 #1 #0
Alarm 2 ALDF
#7 #6 #5 #4 #3 #2 #1 #0
(See Subsec. 3.3.1)
CMAL (#3) A pulse count error occurred. If the CNC software does not
correspond to α series, this bit is not used for a mode other
than the APC MODE. If a built-in pulse coder hardware
discontinued alarm (#1 of alarm 1 = 1 and #7 of alarm 2 = 1)
occurs in a system with an α pulse coder, a pulse count error
has occurred.
3.3.8
Pulse Coder Communication Error Alarm
#7 #6 #5 #4 #3 #2 #1 #0
(See Subsec. 3.3.1)
STB (#5) A communication error occurred from the pulse coder. The
pulse coder or feedback cable is abnormal, or the servo unit
is defective.
CRC (#6) A communication error occurred from the pulse coder. The
pulse coder or feedback cable is abnormal, or the servo unit
is defective.
DTER(#7) The pulse coder does not communicate. The pulse coder or
feedback cable is abnormal.