10. SPINDLE SPEED FUNCTION
1 When an alarm is issued in automatic operation, a single
block stop occurs. The spindle overheat alarm is indicated
on the CRT screen, and the alarm signal “SPAL” is output
(set to 1 for the presence of an alarm). This signal is cleared
2 Even when reset operation is performed after an alarm
occurs, the alarm is issued again unless the cause of the
alarm is corrected.
3 No check is made during spindle stop state (SSTP = 0).
4 By setting the parameter (No. 4913), an allowable range of
speed fluctuations can be set which suppresses the
occurrence of an alarm. However, an alarm is issued one
second later if the actual speed is found to be 0 rpm.