Resetting Sen Signal; Status When Alarm Occurred; Troubleshooting - YASKAWA SGM series User Manual

INSPECTION, MAINTENANCE AND TROUBLESHOOTING
6.2.1 Troubleshooting Problems with Alarm Display cont.
Note
NOTE
6
348
A Absolute encoder power not supplied from
Servopack.
B Incorrect absolute encoder wiring (PA, PB,
RESET, SEN signal (for speed control),
etc.)
C Absolute encoder malfunctioned
D Incorrect user constant setting.
Incremental encoder used with Cn-01 Bit E
set to 1.
E Absolute encoder defective
F Circuit board (1PWB) defective
Alarm A.00 is reset when the power is turned OFF and back ON. It is not reset by the normal
alarm reset.

Resetting SEN Signal

When resetting the SEN signal (i.e., turning it OFF and then back ON) for any reason, keep
the SEN signal at the high level for more than 1.3 s before turning it OFF.
SEN signal
Display and Outputs
Digital Operator g p
Display and Di l d
Alarm Name Alarm Name
ALO1
A.02 OFF
User constants
breakdown

Status When Alarm Occurred

A Power turned OFF during parameter write.
Alarm occurred next power ON.
B Circuit board (1PWB) defective
Cause
Use the Servopack power supply for the
absolute encoder.
Check and correct the absolute encoder
wiring.
• For speed control (Cn-01 Bit 1 = 0), turn
• For speed control (Cn-01 Bit 1 = 1) or posi-
Set Cn-01 Bit E to 0.
Replace servomotor.
Replace Servopack.
ON = High Level
OFF
1.3 s min.
Alarm Output
Alarm Code Output
ALO2
OFF
At power ON
Cause
Replace Servopack.
Replace Servopack.
Remedy
SEN signal OFF and back ON. (See note)
tion control, turn Servopack power OFF
and back ON.
OFF ON
15 ms min.
Alarm Output
ALO3
OFF OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
A B
,
Remedy
p