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How to setup a PTC alarm without tripping the ATV61 drive?

FA236064

23 January 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.