Siemens 6RA70 DC Drive
2
Posts
1
Users
0
Reactions
169
Views
Jun 13, 2022 9:45 am
How can resolve problem A039 alarm in siemens 6RA70 DC Drive ?
1 Reply
Jun 13, 2022 9:46 am
Cause : I2t value of power section too high (active in all operating states)
This alarm is activated if the permissible I2t value for the relevant power section is reached. At the same time, the current limit is set to P077 * 100% of the converter rated DC current. This limit is not cancelled again until the setpoint drops below 100% of the converter rated DC current. See also Fault F039 and Parameter P075.
