Frequently asked questions
How to setup a PTC alarm without tripping the ATV61 drive?
FA236064
29 September 2021
Issue:PTC alarm installation
Product Line:
ATV61, altivar 61, ATV71, Altivar 71
Environment:
All models, all serial numbers
Cause:
Using PTC probes, they can only get an indication when the drive goes into fault. They would like warning alarm before the fault condition
Resolution:
The only way to have just a warning: Alarm Group 1 and R2 ON, is to assign:
1.8 Fault Management
PTC Management
LI6=PTC Probe [PTCL] = Always
Motor Thermal Prot
Overload Fault Mgt [OLL] = Ignore
1.5 Inputs/Outputs CFG
R2 Configuration
R2 Assignment [R2] = Alarm Grp1
Alarm Grp1 Definition
LI6=PTC Alarm [PLA] = ON
!! However, the side effect of: Overload Fault Mgt [OLL] = Ignore is, that motor thermal protection by calculating the I2t will not trip the drive. The drive will not have overload protection.