
8
8.4 Alarms Displayed on Spindle Servo Unit and CNC
562
8.4.2 Errors displayed on the spindle amplifier
NOTE*
1
Note that the meanings of the SPM indications differ depending on
which LED, the red or yellow LED, is on. When the yellow LED is
on, an error code is indicated with a 2–digit number. Error codes
can be checked with diagnostic information (DGN710, 711, 730,
and 731).
When the red LED is on, the SPM indicates the number of an alarm
generated in the serial spindle.
³ See “Subsec 8.4.1.”
SPM
indica-
tion(*1)
Faulty location and
remedy
Description
00 Check the *ESP and MRDY
sequence. (For MRDY, pay
attention to the parameter
setting regarding the use of
the MRDY signal (PRM4001
#0).)
Although neither *ESP (emergency stop
signal; there are two types of signals in-
cluding the PMC signal and PSM contact
signal (NOTE*
2
)) nor MRDY (machine
ready signal) is input, SFR (forward rota-
tion signal)/SRF (reverse rotation sig-
nal)/ORCM (orientation command) is in-
put.
01 Check the spindle motor
speed detector parameter
(PRM4011#0, #1, #2).
When the spindle motor has a high–reso-
lution magnetic pulse coder (Cs sensor)
(PRM4001#6, #5 are set to 0 and 1, re-
spectively), 128 /rev is to be set for the
speed detector (PRM4011#2, #1, #0 are
set to 0, 0, and 1, respectively). Howev-
er, a value other than 128 /rev is set. In
this case, the motor is not excited.
02 Check the parameters for the
detector for Cs contour con-
trol (PRM4001#5 and 4018
#4).
Although use of a high–resolution mag-
netic pulse coder (PRM4001#5=1) or
use of the Cs contour control function by
the sensor (PRM4018#4=1) is not set,
a Cs control command is input. In this
case, the motor is not excited.
03 Check the position coder sig-
nal parameter (PRM4001#2).
Although use of the position coder signal
(PRM4001#2=1) is not set, a servo mode
(rigid tapping, spindle positioning) or
spindle synchronization command is in-
put. In this case, the motor is not excited.
04 Check the orientation soft-
ware option.
Although the orientation option is not set,
an orientation command signal (ORCM)
is input.
05 Check the spindle output
switching software option and
power line status signal
(RCH).
Although the output switching option is
not set, the low–speed winding is se-
lected (RCH = 1).
06 Check the sequence (CON,
SFR, SRV).
Although the Cs contour control mode is
specified, PMC signal (SFR/SRV) is not
input.
07 Check the sequence (SFR,
SRV).
Although the servo mode (rigid tapping,
spindle positioning) is specified, PMC
signal (SFR/SRV) is not input.
09 Check the sequence
(SPSYC, SFR, SRV)
Although spindle synchronization mode
is specified, PMC signal (SFR/SRV) is
not input.