
9.DIGITAL SERVO B-63945EN/02
- 530 -
separate detector outputs position feedback pulses correctly. If
the separate detector outputs position feedback pulses correctly,
such a situation that only the motor makes turns in the reverse
direction at the start of machine movement because of a large
backlash between the motor position and scale position is
considered to have occurred.
#7 #6 #5 #4 #3 #2 #1 #0
2003 TGAL
#1 TGAL 1: The parameter-set detection level is used for a soft disconnection
alarm.
2064 Soft disconnection alarm level
Standard setting 4: An alarm is issued when the motor makes a 1/8 revolution.
Increase the setting of this parameter.
Action 3:
This alarm is issued when synchronization between phase data
and absolute position data sent from the built-in Pulsecoder is
lost. While the power to the NC is turned off, unplug the
Pulsecoder cable, then plug the cable once again after about 10
minutes. If this alarm is still issued, replace the Pulsecoder.
9.3.7 Alarm Related to Invalid Parameter Settings
An alarm is identified from the data of alarm 4.
Alarm 4
DTER CRC STB PRM
Description
1
Invalid parameter detected by the
servo software
When PRM = 1, an invalid parameter is detected by the servo
software. Read the value indicated by diagnosis 352, and troubleshoot
according to "FANUC AC SERVO MOTOR αis/αi series Parameter
Manual".
When PRM = 0, read the bit value indicated by diagnosis 280, and
determine the cause according to the following:
Diagnosis 280#0 = 1: In parameter (No. 2020) used for motor module
specification, a value not within the specifiable range is specified.
Diagnosis 280#2 = 1: In parameter (No. 2023), an incorrect value such
as a value equal to or less than 0 is set.
Diagnosis 280#3 = 1: In parameter (No. 2024), an incorrect value such
as a value equal to or less than 0 is set.
Diagnosis 280#4 = 1: In parameter (No. 2022), a correct value (111 or
-111) is not set.
Diagnosis 280#6 = 1: In parameter (No. 2023), an incorrect value is
set.