Sto Type - Delta ASDA-A3 Series User Manual

Troubleshooting

STO type:

AL500 STO function is enabled
Trigger condition
11
and causes
Checking methods
and corrective
actions
How to clear the
alarm?
AL501 STO_A loss (signal loss or signal error)
Trigger condition
and causes
Checking
methods and
corrective actions
How to clear the
alarm?
AL502 STO_B loss (signal loss or signal error)
Trigger condition
and causes
Checking methods
and corrective
actions
How to clear the
alarm?
AL503 STO self-diagnostic error
Trigger condition
and causes
Checking methods
and corrective
actions
How to clear the
alarm?
11-32
Safe torque off function (STO) is enabled.
Safe torque off function (STO) is enabled. Please check why it is enabled.
1. Use DI.ARST or 0x6040.Fault Reset, or set P0.001 to 0.
2. If not using STO, plug the short circuit device into CN10 or wiring to
short circuit the block. Follow the instructions in Section 3.9.3 for the
STO wiring.
Loss of STO_A signal or STO_A and STO_B signals are not synchronized
for more than 1 sec.
Make sure the wiring of STO_A is correct.
Cycle power on the servo drive.
Loss of STO_B signal or STO_A and STO_B signals are not synchronized
for more than 1 sec.
Make sure the wiring of STO_B is correct.
Cycle power on the servo drive.
An error occurs during STO self-diagnosis.
Make sure the wiring of STO_A and STO_B are correct.
If the wiring is correct, it might be that the STO circuit is causing the error.
Please contact the distributor.
ASDA-A3
Revision December, 2017